CN116709969A - Method and device for measuring the visual field of a person - Google Patents
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Abstract
The invention relates to a method for measuring the field of view of a person by means of a device, comprising the following steps: displaying a visually detectable test point on a segmented display of a device that a person views through the eyes, wherein a spatial position of the person's head relative to the segmented display remains unchanged; during a measurement run, moving test points on the partitioned display along a path by the device, when the displayed test points become invisible to a person at the current position or become visible again during the movement along the path, triggering by the person the interaction device of the device, triggering by the interaction bar causing the device to store the respective current position and related information, from which it can be derived whether the test points become invisible or visible again to the person at the current position; and displaying the field of view of the person on another segmented display, the current location forming an edge point of the area.
Description
Description
The invention relates to a method and a corresponding device for measuring the field of view of a person.
Visual field inspection is an inspection technique of the vision system. Human vision has a central and peripheral vision component. Central vision may be determined as central visual acuity and peripheral vision measured as peripheral vision. The field of view corresponds to a hill and the respective height of a point in the field of view corresponds to the visual acuity of that point. The maximum of this optical field of view is located above the center of the retina, the fovea. Towards the periphery, visual acuity continues to decline. Peripheral visual acuity is measured as light differential sensitivity. Technically, there are two different methods to measure the view field mountain:
■ Dynamic visual field inspection method
Static or contour or grid visual field inspection
Both of these approaches attempt to define the field of view by signaling the patient's perception of the optical stimulus. Thus, the perception threshold is subjectively determined. In dynamic visual field inspection, the test marks slowly progress toward the center in a hemispherical perimeter of constant brightness and then progress on further meridians of the entire circumference, whereas in static visual field inspection, the brightness of the original subthreshold test marks gradually increases at fixed test points located on the meridian. In each case, the perceived test patch is marked. In the dynamic visual field inspection method of a horizontal scanning mountain, several bisectors, i.e., lines having the same sensitivity to brightness differences, are gradually formed. In static vision inspection, a hill is scanned vertically, resulting in a mountain contour that passes through the center of the field of view. Modern computer-controlled grating perimeter follows a predetermined grid of test points, and also scans the field of view vertically, drawing a map, darkening the off-standard portions to varying degrees.
The visual field inspection method and the planar visual field inspection method are different in that in the planar visual field inspection method, the test object is not provided in a hemisphere as in the visual field inspection method, but on a screen or a plane. Thus, the flat visual field inspection method is more suitable for measuring near-center visual field.
Common to all current approaches is that the perception threshold is slowly approached horizontally or vertically. This process is laborious and time consuming. It must be considered that many patients are already elderly at the time of examination and that the willingness of many patients to fit is reduced in a short time.
Current visual field examination typically requires 15 minutes of focused coordination per eye. The lengthy examination time explains the difficulty in correctly characterizing the perception threshold at all measurement points. Therefore, the inspection results are greatly different.
Computerized automated vision inspection procedures free the inspector from cumbersome inspections, but so far have not been free for the patient.
Based on this background it was an object of the present invention to provide an improved method and apparatus for measuring the field of view of a patient or person. This object is solved by the subject matter of the independent claims, preferred embodiments being detailed in the respective dependent claims and in the following description.
According to claim 1, a method of measuring a field of view of a person by means of a device is disclosed, comprising the steps of:
a. displaying a visually detectable test point on a segmented display of a device that a person views through the eyes, wherein the spatial position of the person's head relative to the segmented display is fixed, and
b. During a measurement run, the test points on the segmented display are moved by the device over a predetermined path and during the measurement run the interactive device of the device is triggered, preferably whenever the displayed test point becomes invisible (so-called off-point) or visible again to the person during the movement of the current position on the path, wherein the triggering of the interactive device causes the device to store the respective current position and the relevant information, from which it can be derived whether the test point of the current position becomes invisible or visible again to the person.
Preferably, the method comprises the further steps of:
c. -displaying an area (90) of the field of view of the information and/or person (P) on the segmented display (2) and/or on the further segmented display, said current position forming an edge point of the area (90).
The method according to the invention is also referred to as a rapid planview examination method and represents a screening method by means of which the central 10 ° view of a person can be measured in a minimum time, for example in a minute. During the measurement run, the density of test spots is relatively high, preferably lasting less than one minute, which is in contrast to the computer automated visual field inspection method, which is advantageous for detecting light spots. Automated computer vision inspection typically only measures 16 or 25 test points in a 10 ° field of view, whereas the present method can effectively make highly accurate measurements of a person's field of view in fine grid runs, for example, scanning the entire 10 ° field of view in each case on five paths above and below, left and right of the center of the inspection field of view. Thus, during standard operation of the inspection, the path length taken by the test point is: patient to monitor distance by a factor of 0.5 to patient to monitor distance by a factor of 3, particularly patient to monitor distance by a factor of 1 to patient to monitor distance by a factor of 2, and more particularly patient to monitor distance by a factor of 1.7625.
Example 01: the distance of the patient from the display is 40cm by a factor 1.7625 =70.5 cm
Example 02: the patient is at a distance of 80cm from the display by a factor 1.7625 =141 cm
The relatively rapid movement of the test points and the preferably large contrast between the background of the segmented display and the test points, as well as the short inspection time, help to pay attention to and increase the security of the measured data. In addition, the short examination time, such as 1 minute, improves the applicability of the method in clinical routine. In the event that a field of view defect is found, additional investigation controlled by the inspector may ensure that the collected measurement data is more accurate. The trend of nerve fibers is known. The coordinates assigned to the focal spot, the boundaries of which can be defined precisely in a programmed manner according to the trend of the nerve fibers in the direction of the optic nerve (see fig. 3).
Preferably, the procedure is performed separately for each eye, covering the non-measuring eyes of the person. For example, the field of view area may be displayed by displaying or marking the current location, thereby creating the impression of the area for the inspector. Furthermore, by creating an external boundary line connecting the current position on another divided display, the area can be more clearly highlighted. Alternatively or additionally, the area within the displayed borderline (or the virtual borderline not displayed) may be highlighted with color in the context of another segmented display.
The path of movement of the test points need not be continuous but may be made up of separate parts and then traversed one by one, for example, one after the other. In principle, the path or the part may take all conceivable forms, wherein preferably the field of view of the person being examined is traversed several times along the path by the test spot, so that the area is scanned, for example in two dimensions (e.g. horizontal and vertical, or with respect to a segmented display, e.g. row-wise and column-wise).
According to an embodiment of the method, provision is made for the test point to have a speed S/f in [ cm/S ] when moving on the segmented display, wherein S/f is the ratio of the movement distance S to a number f in the range of 2 to 7, in particular in the range of 3 to 6, in particular in the range of 4 to 5, wherein the number f is in particular 4.7.
Example 01: patient to display distance = 40cm; the calculation results were 14.1 cm/factor 4.7=3 cm/s for a total of 14.1cm on the screen for vertical scans of 10 ° above and below the center of the examination zone.
Example 02: patient to display distance = 80cm; the calculation results were 28.21 cm/factor 4.7= 6.00213cm/s for a total of 28.21cm on the screen for a vertical scan of 10 ° above and below the center of the examination zone.
Furthermore, it is provided according to an embodiment of the invention that at least 500 to 50000 different positions (or pixels of the segmented display), in particular at least 1000 to 25000 different positions (or pixels of the segmented display), in particular at least 1500 to 10000 different positions (or pixels of the segmented display), in particular at least 2500 different positions (or pixels of the segmented display) in the field of view are checked by test points during a measurement run within 1 minute. Preferably, during the measurement run, these locations (also referred to as test points) are so close that they partially overlap. For example, at a distance of 40cm from the patient to the display, the path traversed is about 70.5cm, subjectively creating a locus of points or test points, for example, on a narrow retina, resulting in a subjectively perceived transient darkening of the locus only in the retinal region.
In particular, the invention is based on the basic idea that the test spot appears to the patient as a constantly moving constant spot. Furthermore, according to an embodiment of the invention, it is provided that the total length of the path is at least 17.625cm to 705cm, in particular at least 35.25cm to 352.5cm, in particular at least 52.875cm to 176.25cm, in particular at least 70.5cm, wherein the test point runs through the entire path during a measurement in less than or equal to 1 minute.
Furthermore, in an embodiment of the method it is preferably provided that the distance of the human eye or eyes from the segmented display is between 10cm and 400cm, preferably between 20cm and 200cm, preferably between 30cm and 100cm, in particular 40cm, when the test point is moved along the path.
According to another embodiment of the invention, the path may have a plurality of first sections parallel to each other. According to another embodiment, the path may have a plurality of second sections parallel to each other. In principle, this may enable a two-dimensional scanning of the field of view of the person or of the entire field of view. In this case, it is preferably provided that the first section intersects the second section so that the first and second sections define, for example, a grid.
According to an embodiment of the method, the test patch is first moved along a first section (e.g., each in a first direction) and then along a second section (e.g., each in a second direction). Here, the first section of the path may extend vertically over the segmented displays, and the second section preferably extends horizontally over the segmented displays (or vice versa) if one or both segmented displays are tilted with respect to the horizontal plane, which is also referred to as the vertical section, and then extends substantially vertically with respect to the horizontal section of the path.
Furthermore, according to an embodiment of the invention, it is provided that the path has at least one section extending in the vertical direction or being inclined to the vertical direction. Furthermore, according to one embodiment, it is provided that the path has at least one portion extending in an arc-shaped, in particular in a semicircular manner. Furthermore, according to one embodiment of the invention, it is provided that the path has at least one section extending through the nerve fiber, in particular orthogonal to the optic nerve fiber of the subject's eye.
Furthermore, according to one embodiment, the path has a plurality of linear sections.
Furthermore, according to an embodiment of the invention, it is provided that, for visualizing the area of the field of view, the current position of the measuring run in which the test point becomes invisible is connected to a line which is displayed as a borderline of the area on the other partial display and/or the current position of the measuring run in which the test point becomes visible is connected to a line which is also displayed as a borderline of the area on the other partial display.
According to a further embodiment of the method, it is provided that the area enclosed by the borderline is displayed on a further segmented display, optically distinguishable from the background of the further segmented display.
Furthermore, in an embodiment, the method according to the invention may provide for checking the detected area (limited by the stored current position) by repeatedly directing test points (controlled by the inspector on the segmented display) away from said area into the surrounding area where the test points are again visible to the person.
Furthermore, according to an embodiment of the method, it is provided that during a measurement run, a central target, in particular in the form of a cross, is displayed on the segmented display, which target is weaker than the test point and can be seen by the person in order to fix the gaze direction of the person (and thus the field of view), the device preferably detecting whether the gaze direction of the person deviates from the central target during the measurement run, and if a deviation is detected, stopping the movement of the test point.
Furthermore, it is provided according to an embodiment of the invention that during a measurement run, the movement of the test point is coupled with the interactive device in such a way that, when the interactive device is triggered, a stopping and returning movement of the test point (in particular corresponding to the reaction time of the person) along a path in opposite directions is performed.
According to an embodiment of the invention, the brightness of the test point is specified to be particularly 200cd/m 2 To 1000cd/m 2 In particular in the range of 300cd/m 2 To 400cd/m 2 Within a range of (2).
Preferably, according to an embodiment, the test points are displayed on a segmented display in front of a (preferably dark) monotonic background displayed on the segmented display, wherein the brightness of the test points is greater than the brightness of the background. For example, the background may be displayed in a dark blue color, particularly in a tone 000066 (hexadecimal RGB code). The background may also be another dark color.
Furthermore, according to an embodiment, the center target (e.g., a cross) may have the hue of hexadecimal RGB code 1111 AA. The test points may have a hexadecimal RGB code of FFFFF tone. However, other combinations of colors or contrast are also conceivable.
According to an embodiment of the invention, the test points on the segmented display are moved within the test field (i.e. the path is located within the test field, in particular defining its edges), the test field having four corners and a height H.
Furthermore, according to an embodiment of the invention, provision is made for the test points to be generated on the segmented display in such a way that the diameter in the corners of the test field is in the range from H/4.7 to H/470, in particular in the range from H/20 to H/200, in particular in the range from H/30 to H/100, in particular in H/47, where H is in each case the height of the test field in the vertical direction in cm.
Further, according to an embodiment of the present invention, the diameter of the test spot automatically varies with distance from the central target, decreasing in diameter toward the central target, and having a minimum diameter at the central target area.
Preferably, the minimum diameter of the test point is in the range from H/18 to H/1800, in particular in the range from H/75 to H/750, in particular in the range from H/125 to H/500, where in particular the minimum diameter is H/180, where H is in each case the height of the test field in the vertical direction in cm.
In an embodiment of the method according to the invention, the above-mentioned steps are preferably each performed automatically, except for the triggering of the interaction unit by a person, which is achieved by the action of the person. Furthermore, if necessary, the inspector can manually track the test points to accurately find any limit of the change in the visibility of the test points if necessary. The processing unit may be constituted by (or comprise) a computer on which a computer program comprising instructions may be executed, which instructions cause the processing unit to perform the method steps (using other components of the device). When referring to a processing unit, this also includes embodiments in which the method steps are performed by a plurality of cooperating processing units. Instead of at least one computer or at least one processing unit executing a computer program, the processing unit may also be constituted by a hard-wired control unit.
Furthermore, according to an embodiment of the method, it is provided that the speed of the test point is temporarily significantly slowed down, for example by at least 50%, if desired by the investigator, in particular by interaction with a user interface of the device, in particular in order to specify a current position at which the test point becomes invisible or visible again (for example when said position is traversed again with the test point if desired).
Furthermore, according to an embodiment of the method, it is provided that after a first measuring run along the above-mentioned path, when a current position is detected at which the test point becomes invisible or becomes visible again, in each case at least one further measuring run is performed at the respective stored current position, in particular in order to be able to more accurately detect or visualize the area (see above).
Furthermore, according to an embodiment of the method, the method further comprises the steps of: another measurement run is performed for each segment of a path of a (first) measurement run, which path extends between two adjacent stored current positions, in each case a test point on a partitioned display being moved by a device along another path within an area on the partitioned display, which partitioned display contains the respective section as a centre, and in each case an interactive device of the device being triggered by a person, becoming visible again when the displayed test point is not visible to the person at the current position, or during its movement along another path within the area, wherein triggering of the interactive device causes the device to store the respective current position of the test point within the area and related information, from which it can be derived whether the test point becomes invisible or visible again at the current position.
According to a further embodiment of the method provision is made for, after a respective further measurement run, further measurement runs to be made on sections of a further path found in the respective region, which sections each extend between two adjacent stored current positions of the further path and are located at the edges of the region until a section previously found in the measurement run or in the further measurement run is found in the process, for which section a further measurement run is likewise made, in each case a test point on the partitioned display being moved by the device along the further path within the region of the partitioned display, which partition contains a section as a centre, in each case if the displayed test point is invisible to a person at the current position or becomes visible again during its movement along the further path within the region, the interaction device of the device being triggered by a person, the triggering of the interaction device resulting in the respective current position and the relevant information of the test point being stored in the region, from which it is possible to derive whether the test point becomes invisible or visible again at the current position to the person.
According to an embodiment of the method, it is further provided that the size of the individual regions is 5 °, in particular 2.5 °, in particular 1 ° around the center of the region, and that during the respective further measuring operation the distance between adjacent parallel sections of the further path in the region is in each case 2.5 °, in particular 1 °, in particular 0.5 °.
By selectively storing measurements of other people, such as in a database, artificial Intelligence (AI) can be used to further identify potential field of view failure areas of a person. In particular, two basic artificial intelligence methods can be used for this purpose:
statistical analysis based on the stored current position (e.g. in a coordinate system of a partitioned display or another partitioned display, where the respective position is designated as a (x, y) coordinate pair) -e.g. using AI machine learning, or
Image analysis of the visualized examination results or areas-e.g. using AI deep learning.
Based on the results of analysis of other individuals by artificial intelligence and the likelihood of visual field defects occurring in comparison to other individuals, areas of potential additional visual field defects that have not been detected can then be automatically inspected.
Accordingly, according to another embodiment of the method, the method comprises the further step of automatically selecting at least one region by means of an artificial intelligence algorithm, which algorithm has been trained with a plurality of data sets of different persons, wherein a further measurement run is performed,
in each case, the test point on the partitioned display is moved by the device along another path on the partitioned display, wherein,
In each case, if the displayed test point is not visible to the person at the current location or becomes visible again during its movement along another path within the area, the interaction device of the device is triggered by the person, wherein the triggering of the interaction device causes the device to store the respective current location of the test point within the area together with the relevant information, from which it can be derived whether the test point becomes invisible or visible again to the person at the current location.
Furthermore, according to an embodiment of the method, provision is made for the artificial intelligence algorithm to be designed to select at least one region based on a data record of a different person, wherein the respective data set of the person comprises a stored current location of the person, or for the artificial intelligence algorithm to be designed to select at least one region based on a data set of a different person, wherein the respective data set corresponds to a visualization region of the person.
Furthermore, according to an embodiment of the method, during manual area inspection, the inspector marks areas on the inspection area where further testing is automatically performed.
According to an embodiment of the method, the method further comprises the steps of: at least one further measurement run is performed on the area selected by the inspector, wherein the test points on the partitioned display are moved by the device on the partitioned display along a further path within the area, and in each case the interaction device of the device is triggered by the person, when the displayed test point is invisible to the person at the current position or becomes visible again during its movement along the further path within the area, triggering of the interaction device causes the device to store the respective current position of the test point within the area and the relevant information, from which it can be derived whether the test point becomes invisible or visible again to the person at the current position.
Furthermore, according to an embodiment of the method, provision is made for the inspector to perform a manual free inspection, wherein the test points are completely manually controlled by the inspector on the inspection area (e.g. the partition display or another partition display).
In this regard, it is further provided according to one embodiment of the method that the method further comprises the steps of: at least one further measurement run is performed in which test points on the segmented display are moved by the device along a further path under the control of the inspector, in each case when the displayed current position of a test point in the area becomes invisible or visible again to the person as it moves along the further path, the person triggering an interaction device of the device, wherein triggering of the interaction device causes the device to store the respective current position of the test point in the area together with the relevant information from which it can be derived whether the test point becomes invisible or visible again to the person at the current position.
When the region of the human field of view is displayed on the region display and/or further region display, the current position stored in the further measuring operation now also forms an edge point of the region. Thus, the accuracy of the region is also improved. In particular, in order to achieve a visualization of the area, the current position stored in the measuring operation and in the further measuring operation, as well as the position at which the test point becomes invisible, may be connected by a line, which is displayed in the further segmented display as a borderline of the area. Alternatively or additionally, the current position at which the test point stored in the measuring operation and in the further measuring operation becomes visible can be connected to a line which is displayed as a borderline of the area on the further partial display, whereby in particular the area surrounded by the borderline is displayed on the further partial display in a visually distinguishable manner from the background of the further partial display.
In the above-described measurement run or another measurement run, the inspector can optionally influence the respective measurement run in each case, for example: by passing through
Variable test point sizes (e.g., start and end sizes of test points and variations in test point sizes),
the speed of the test points along the respective path,
the direction of the path to be traversed (e.g. horizontal, vertical, diagonal),
-several sections of the path to be traversed on a partitioned display or on another partitioned display or within a certain area.
Another aspect of the invention relates to a computer program comprising instructions which, when executed by a computer, cause the computer or device to perform the steps of the method of the invention.
According to a further embodiment of the method according to the invention, it is provided that the content of the partial display is transmitted to the further partial display via a data transmission link, in particular during a measurement run, and/or the content of the further partial display is transmitted to the partial display via a data transmission link, in particular during a measurement run.
In the above embodiments, the data transmission link may be a computer network connection, in particular an internet connection, which may use one or more known network protocols. The data transmission link may also be a radio link or may be formed by radio link segments.
According to a further embodiment of the method, it is provided that the device comprises a processing unit, in particular for displaying and moving the visually detectable test points on the segmented display.
According to a further embodiment of the method, provision is made for the processing unit to be a local processing unit (client) located at the person's location, wherein the respective current location and the associated information are stored on the local processing unit and transmitted via a data transmission link to another processing unit and evaluated on the other processing unit, generating a result data set.
According to an alternative embodiment of the method, the processing unit is a local processing unit (client) located at the person's location, the respective current location and related information being stored on the local processing unit and evaluated on the local processing unit to generate a result data set, which is transmitted to another processing unit via a data transmission link.
The local processing unit may be a personal computer or a client, in particular in the form of a desktop, notebook or tablet computer. The other processing unit may be a (remote) server.
According to a further alternative embodiment of the method, provision is made for the device to further comprise a local processing unit located at the person's location, which processing unit is connected to the partition display, wherein the processing unit (in particular the server) causes the display and movement of the visually detectable test points on the partition display via a data transmission link with the local processing unit, wherein the respective current location and the associated information are stored and evaluated on the processing unit (server) to generate a result data set.
The local processing unit may in turn be a personal computer or a client (see above). The processing unit is preferably a (remote) server, which is connected to the local processing unit via a data transmission link.
In the above-described embodiments, the data transmission connection may be a computer network connection, in particular an internet connection, which may use one or more known network protocols. The data transmission link may also be a radio link or may be formed by radio link segments.
The result dataset may have graphically representable data corresponding to or encoding the region of the subject's field of view.
Another aspect of the invention relates to a computer program comprising instructions which, when executed on a processing unit, cause the processing unit or device to perform the steps of the method according to any of claims 22 to 25.
Another aspect of the invention relates to a computer readable storage medium on which a computer program according to the invention is stored.
Another aspect of the invention relates to a device for measuring a person's field of view, which device is particularly arranged for performing the method according to the invention (within this scope, the device may also be further described by the various features of the method according to the invention described herein). The device comprises at least:
A partition display configured to be viewable by a person,
a processing unit configured to display the test patch to a person on the segmented display and to move the test patch along a predetermined path on the segmented display,
-an interaction device configured to be triggered by a person when the displayed test patch is not visible to the person during movement on the path or is visible again at the current location, wherein the processing unit is configured to store the respective current location and related information from which it can be derived whether the test patch is not visible to the person or is visible again at the current location when the interaction device is triggered.
In particular, the device may be configured to perform or be used to perform the steps of the method of any one of claims 1 to 25.
According to an embodiment of the invention, the interaction device comprises an actuation element for triggering the interaction device. For example, this may be one of the following actuating elements: switch, microphone, touch-sensitive screen, rotatory knob, slider.
If the area or field of view being inspected is scanned by the test point, so that the test point is again alternately made invisible and visible, it is sufficient if the interaction device is triggered with a single signal, which is generated, for example, by activating one of the above-mentioned actuating elements when the visibility of the test point changes. In this respect, a microphone is also understood as an actuating element. Signals from the interaction device may reach the processing unit and be received and processed by it in various ways. It is conceivable here, for example, an electrical signal, an electromagnetic signal, an optical signal, an acoustic signal.
Furthermore, according to an embodiment of the device, it is provided that the device is configured to generate a central target (in particular in the form of a cross) on the segmented display, which central target is observable by a person through the eye to be measured. According to another embodiment of the device, it is provided that the device comprises another partitioned display, which is configured to be viewable by an inspector.
Furthermore, according to an embodiment of the device, it is provided that the partitioned display is formed by or comprises a screen.
Furthermore, in an embodiment of the device, the further segmented display for the inspector is formed by a screen or comprises a light source for generating an image on the projection surface.
According to a further embodiment of the device, the processing unit is further configured to determine and display a field of view area of the person to the inspector on a further partitioned display, wherein said detected or stored current position forms an edge point of the area.
According to a further embodiment of the device, it is provided that the device comprises a fixation unit configured to fix the head position of the person relative to the segmented display.
According to a further embodiment of the apparatus, it is provided that the device comprises a further processing unit, wherein the processing unit is configured to transmit the current position and the related information to the further processing unit via a data transmission link, wherein the further processing unit is configured to evaluate the current position and the related information to generate the result data set.
The resulting dataset may have graphically displayable data corresponding to or encoding the field of view of the person. The partition display and the interaction device may be connected to a processing unit, which is arranged at the person's location or may be located. The other processing unit may be a remote server. The data transmission link may be a computer network connection, in particular an internet connection, which may use one or more known network protocols. The data transmission link may also be a radio link or may be formed by radio link segments. In addition, the other partitioned display may be connected to a server or a client connected to the server through a computer network. Thus, the above-described embodiments allow a patient to perform a measurement run on a partitioned display in the home and send corresponding data (current location and related information) to a remote server for evaluation.
According to a further embodiment of the device, it is provided that the device comprises a further processing unit, wherein the processing unit is configured to evaluate the current position and the related information to generate a result data set and to transmit the result data set to the further processing unit via the data transmission link.
The resulting dataset may then have graphically displayable data corresponding to or encoding the field of view of the person. The partition display and the interaction device may be connected to a processing unit, which is arranged at the person's location or may be located. The other processing unit may be a remote server. The data transmission link may also be a computer network connection, in particular an internet connection, which may use one or more known network protocols. The data transmission link may also be a radio link or may be formed by radio link segments. In addition, the other partitioned display may be connected to a server or a client connected to the server through a computer network. This embodiment also enables the patient to perform a measurement run on a locally partitioned display in the home, where the evaluation of the measurement data (current location and related information) is also performed locally, with only the resulting data set being transmitted to a remote server or inspector.
According to a further embodiment of the device, the device further comprises a local processing unit located at the person's location, which processing unit is connected to the partition display, wherein the processing unit, in particular the server, causes the visually detectable test points on the partition display to be displayed and moved to the local processing unit via a data transmission link, wherein the respective current location and the associated information are stored and evaluated on the processing unit (server) to generate a resulting data set.
Again, the resulting dataset may have graphically displayable data corresponding to or encoding the field of view of the person. The partition display and the interactive device may be connected to a local processing unit, which may be arranged or positioned at the person's location. The processing unit may be a remote server. The data transmission link may be a computer network connection, in particular an internet connection, which may use one or more known network protocols. The data transmission link may also be a radio link or may be formed by radio link segments. In addition, the other partitioned display may be connected to a server or a client connected to the server through a computer network. Thus, the above-described embodiments enable a patient to perform a measurement run on a segmented display at home. Thus, the measurement runs are performed and evaluated on the server. For example, the patient may access an internet page through his local processing unit using a web browser, which forms a user interface for performing the measurement run. The corresponding application may be executed on a server.
The device according to the invention can furthermore be characterized by the features mentioned above in connection with the method.
It is particularly important that the segmented displays are characterized by their graphical display surfaces being substantially flat.
Hereinafter, embodiments of the present invention and further features and advantages of the present invention will be explained with reference to the accompanying drawings. The drawings show:
figure 1 is a schematic view of an embodiment of the device according to the invention,
fig. 2 is a path diagram traced from a test point in a method according to the invention,
fig. 3 is a schematic diagram of an optic nerve, for comparison with the access segment shown in fig. 2,
fig. 4 shows the current position of the detected or stored test point, which changes its visibility at these positions,
fig. 5 shows a colored highlighting of a field of view of a person measured with the method or device according to the invention as described in fig. 2, which may correspond to a field of view defect,
fig. 6 is a diagram of another path that may be scanned through a test point in a method according to the present invention,
fig. 7 is a schematic view of an embodiment of the device according to the invention, which is particularly suitable for telemedicine purposes,
fig. 8 is a schematic of the current positions recorded during the first measurement, at which positions the test points again become invisible or visible,
Fig. 9 is a schematic diagram of a further measurement run in a reduced area, the center of which corresponds to the loss previously detected during the first measurement run,
fig. 10 is a schematic diagram of another measurement run in a zoomed-out region, the center of which corresponds to the loss previously detected in a certain region,
fig. 11 is a schematic illustration of a further measurement run in a reduced area, the center of which corresponds to the further loss detected in the first measurement run,
fig. 12 is a schematic diagram of further measurement operations in two reduced areas by using an artificial intelligence algorithm trained on patient data,
FIG. 13 is a schematic diagram of further measurement runs in two contracted areas previously determined by an inspector, and
FIG. 14 is a schematic diagram of a further measurement run in which the test point is moved along another path, which is determined in real time by an inspector.
The method according to the invention is also referred to hereinafter as rapid planview examination (RAP CAMP or RAP-CAMP). In the method, according to one embodiment, for example using the device according to fig. 1, which will be described in detail below, the following steps are basically performed:
o displays a visually detectable test point 6 on the segmented display 2 of the device 1, which is viewed by eyes of the person P, wherein the spatial position of the head of the person P with respect to the segmented display 2 remains unchanged,
o during the measuring run, by means of the device 1 moving along the path 7 the test point 6 on the segmented display 2, when the displayed test point 6 becomes invisible or visible to the person P during the movement of the current position 9 along the path 7, an interactive device 8 (see fig. 4) of the device 1 is triggered by the person P, wherein the device 1 stores the respective current position and the related information by triggering the interactive device 8, from which information it can be derived whether the test point 6 becomes invisible or visible again to the person P at the current position, and
o displaying an area 90 of the person's P field of view on the other segmented display 3, said current position 9 forming an edge point of this area 90.
This may directly lead to the decisive advantage of the procedure according to the invention or of the individual embodiments of the procedure:
repeated test points 6 and accelerated inspection.
Within 10 ° of the field of view, the inspection can be performed in hundreds to thousands of positions, instead of 16 or 25 positions (like the perimeter of a modern computer), improving the detectability of absolute spots.
Concentration and cooperation with the patient are easy to exercise, about 1 minute. This makes the patient information more reliable.
The applicability of the method is increased, since it is possible to integrate in routine examinations for a period of about 1 minute, contrary to visual examinations.
RAP-CAMP becomes an easily adaptable method for screening absolute spots.
Each patient suspected of normal tension glaucoma may be examined. About 0.3% of the population over 40 years of age in germany suffers from normal tension glaucoma.
Risk factors for normal tension glaucoma are myopia and migraine. In germany, migraine is about 1% of the incidence. Every patient with myopia and migraine who is over 40 years old should be examined. The frequency of diagnosis of normal tension glaucoma increases because the flare can be found faster and more reliably and more patients will be examined.
Glaucoma patients (approximately 1% of the population over 40 years in germany) are easily controlled more frequently.
However, the method described here is not in particular a diagnostic method, but is merely a measurement method, which in particular does not comprise a diagnostic step, but in particular only performs a measurement of the field of view.
According to an embodiment, the method according to the invention may be performed, for example, by the following steps:
■ The patient sits in front of the segmented display 2 in the form of a screen, for example at a distance a of 40cm.
■ The head of the patient P is fixed by a fixing unit 4 including a chin and forehead support.
■ The bright white test spot 6 runs in rapid succession on the otherwise dark screen 2.
■ Test points 6 traverse the field of view horizontally, vertically and diagonally, so the test program covers the grid of quadrants.
■ As soon as the test point 6 becomes invisible to the patient P and becomes visible later, the patient P will in each case signal a change.
■ At the end of the examination, the current positions 9 of all these detected test points are connected to one another in a preliminary connection when the test point 6 becomes invisible (off point) or visible again (on point), so that the area 90 of the field of view, which may correspond to a field of view failure, becomes identifiable (see fig. 4).
■ Subsequently, the visual field loss can be clarified during the dynamic visual field inspection.
Fig. 1 shows an embodiment of a device 1 for measuring the field of view of a person P, which device is adapted to perform the method according to the invention. The device 1 comprises a segmented display 2 configured to be viewed by a person P. The device 1 further comprises a further segmented display 3 configured to be viewed by an inspector U, and an optional fixing unit 4 configured to fix the position of the head of the person P relative to the segmented display 2. The device 1 further comprises a processing unit 5 (e.g. in the form of a computer) configured to display and move the test points 6 of the person P on the partitioned display 2 along a predictable path 7 on the partitioned display 2. The device 1 further comprises an interaction device 8 configured to be triggered by the person P when the displayed test patch 6 becomes invisible to the person P or becomes visible at the current position 9 during its movement along the path 7, wherein the processing unit 5 is configured to store the respective current position 9 and related information from which it can be derived whether the test patch 6 becomes invisible to the person P or becomes visible at the current position 9 when the interaction device 8 is triggered (see fig. 4). The processing unit 5 is further configured to display an area 90 of the field of view of the person P on the further segmented display 3, wherein the current position 9 forms an edge point of the area 90.
The fixation unit 4 may have, for example, a chin and forehead support, on which the patient P may place his chin. Prior to this, a holder may be provided, so that any ophthalmic lens that may be required may be used.
Preferably, the segmented display 2 is designed in the form of a screen and is arranged at a fixed distance a from the unobstructed eye of the patient P. The interaction device 8 may be operated by the patient, for example by singing/sounding.
Furthermore, a stationary control unit may be provided to ensure that the patient P concentrates on the central target 10 (e.g. a cross) with the eye to be examined. Preferably, the observation of this central fixed cross 10 is controlled by the inspector U and is precisely adjusted at the beginning of the inspection (e.g. by corneal reflection or pupil image). In the case of an offset from the central fixed point 10, the operation of the test point is preferably stopped automatically by the fixed control unit.
The segmented display 2 or screen 2 is preferably completely different from any common visual field examination method and planar visual field examination method. It preferably has the following characteristics:
the color of the segmented display 2 is darkened, for example, with a shade of dark blue; other dark colors are also possible.
The distance of the patient's eye P to the partition display or screen 2 is set to, for example, 40cm. Thus, the flat visual field inspection according to the present invention is performed within a central 10 ° range of 14.1cm mesh size (vertical) to 15 ° range of 21.4cm mesh size (horizontal). Within this range, all cases of early glaucoma, as well as blind spot F (see fig. 3), can demonstrate to the patient the disappearance of the test spot.
Fig. 3 schematically shows the course of the nerve fibers N on the back of the eyeball. The square corresponds to a central 10 ° field of view G, and in addition, the most visually acute position S is shown. The circle BS shows an exemplary path of the arc-shaped spot.
According to an example of the invention, test point 6 is bright white. Unlike the hemispherical perimeter, there is no increase in brightness (environment + test point). Instead of a dark background, there are bright test points.
The central target 10 (e.g. a central cross) acts as a fixed point, see above. It is therefore preferably clearly visible for ease of viewing, but on the other hand not too bright, causing the patient P to see his eyes. Thus, it is preferably weaker than the test point 6 and may have a shade of, for example, bluish (other colors are possible).
The size or diameter of the test site 6 is preferably adjustable and may be adjusted according to the needs of the patient being examined. According to one example, the diameter of the test spot may be 2mm, corresponding to a range of 0.3 in the field of view. In some applications, a 2.5mm test point (a range of 0.4 ° in the field of view) may be necessary, with the test area being more than 10 ° from the center, as visual acuity decreases toward the periphery. In addition, patients with poor visual acuity should also be able to receive the examination. A test point as small as 1 or 1.5mm will allow for a more accurate inspection as long as it is easily perceived. However, the inspector may be larger. The device 1 is preferably designed in such a way that the test point 6 becomes larger with increasing distance from the center 10.
One of the significant differences from all prior art visual field inspection methods is the speed of operation of test point 6. Because it moves relatively fast 6 in the patient's field of view. Thus, the perceptibility of the test point 6 can be measured at a very large number of locations in a short time. According to one example of the invention, it is possible to check 3750 positions within 10 ° in 30 seconds, for example. Modern computer vision inspection is 16 to 25 points in the 10 range, depending on the program. On the other hand, the inspection speed of the present invention may be, for example, 125 frames per second. In the method or device 1 according to the invention, the speed of operation of the test points 6 can be adjusted according to the individual requirements of the patient under examination.
Fig. 2 illustrates a path 7 that a test point 6 may take during a measurement run due to a corresponding configuration or design of the device 1.
According to an embodiment of the invention, the device 1 is designed to run the test point 6 along the path 7, first along six vertical sections 70 from right to left, in particular alternately from top to bottom and from bottom to top, and then along four horizontal sections 71. The length of the path 7 may be, for example, about 130cm on the segmented display 2. If a test point speed of 3cm/s is used, the result of this example is a test time of less than 1 minute.
Fig. 5 shows another configuration of path 7. In this case, the test points 6 are first guided along four vertical sections 70 from right to left, in particular alternately from top to bottom and from bottom to top. Thereafter, the test points 6 are guided along four sections 72 which are inclined with respect to the vertical, for example through a 5 ° circle and/or a 10 ° circle, in particular orthogonal to the respective circle. This has proved to be advantageous because the nerve fibers N of the optic nerve (see fig. 3) are thus cut as vertically as possible.
The other segmented display 3 or the other screen 3 of the examiner U preferably also has a central target/cross 10, which corresponds to a fixed point 10 of the patient on the screen 2. Furthermore, circles of 5 °, 10 °, and 15 ° of the field of view size are preferably displayed.
The two partial displays/screens 2, 3 are coupled to each other and cooperate in particular, wherein the test point 6 is also visually operated for the inspector U on the other screen 3. If the patient P signals the disappearance or reappearance of the test points 6, these test points or current positions 9 (see fig. 4) are marked on the screen 3 of the inspector U.
At the end of the examination, the processing unit 5 of the device 1 connects all the positions or points 9 of the test points 6 that become invisible (off-point) or visible again (on-point) to each other in a preliminary connection, so that the possible form of the field of view loss becomes identifiable, as is shown by way of example in fig. 4. If necessary, the pre-drawn field loss probability can be verified by moving the test point (the test mark like a cursor) from the invisible area to the visible area, as in the dynamic visual field inspection method. Such a test point movement controlled by the inspector U is controlled by the inspector U, for example, by means of an input device 11, in particular a direction key of the computer or processing unit 5. The device 1 or the processing unit 5 may further be designed to automatically visualize said area 90 or suspected field of view loss at the end of the examination, as shown in fig. 5.
During the measurement run, the patient P may signal a change in the visibility of the test point 6 by various means, such as pressing a button, speaking or the like. The interaction device 8 is provided with corresponding input means for this.
The location 9 of the loss of signal sent by the patient P is stored by the device 1. After the first measurement run, the region indicated by patient P may be manually specified by the inspector. Such an explanation is made for a hypothetical visual field failure 90, for example, by approaching again more slowly the approximate location of the change in visibility after the first measurement run, and focusing attention on the failure area indicated by patient P. In principle, the method according to the invention also appears to be suitable for design as a telemedicine method. For example, the measurement run or inspection may be performed over the internet. If the patient P is in his premises with only a computer he can be checked and if necessary the inspector U can remotely perform the measurement run. Especially for experienced patients, such as glaucoma patients, who have been examined several times, the examination procedure is known, so that the examination can be repeated autonomously if necessary (covering one eye, keeping a distance of e.g. 40cm, fixing the central object 10, e.g. pressing a button when the checkpoint disappears). No auxiliary personnel will be needed. For example, the patient may collect his findings periodically and send them to his doctor (inspector U). In other areas of the world where visual field inspection is not available, support personnel receiving inspection technical instructions via the internet can collect and send findings of one-sided visual field inspection.
Fig. 1 shows a further embodiment of a device 1 for measuring the field of view of a person P, which is suitable for performing the method according to the invention, and which does not require that an inspector U be present at the location of the patient P.
In this case the device 1 comprises a segmented display 2, which segmented display (in particular a screen) 2 is connected to a local processing unit (for example in the form of a computer) 5, which in turn is connected to an interaction device 8, which may be, for example, a keyboard or a microphone of a computer. The local processing unit 5 is connected via a data transmission link V, for example an internet connection, to a further processing unit 55, which may be, for example, a server. At the server side, a partition display 3 and a keyboard 11 may also be provided for use by inspector U. With regard to the measurement run, this can now be realized by a computer program executed on the local processing unit 5. On the local processing unit 5, the measurement data (current position and related information) can be stored and evaluated, while a result data set is generated. The resulting data set may be transmitted to the server 55 or inspector U via the data transmission link V. Alternatively, the measurement data may also be transmitted to the server 55 and evaluated there to generate a result data set.
Furthermore, it is possible to implement the measurement run by a computer program executing on another processing unit 55, e.g. a server, for example as a browser-based application. The patient may access the application program via a data transmission link or an internet connection V, and measurement data collected during a measurement run may be stored on a server 55 where it is evaluated to generate a result data set.
In a variation of the above procedure, the resulting dataset may have graphically representable data corresponding to or encoding said region 90 of the person's field of view (see fig. 4 and 5). This area 90 may be displayed to the patient, for example, via the partition display 2, or via another partition display 3 to the remote inspector U.
The inspector U can communicate with the patient P, in particular during the measurement run. Such a (e.g. audiovisual) communication between the patient and the inspector (e.g. in the form of a video chat) may also be realized by means of a data transmission link V or other means between the two processing units 5, 55.
Thus, various designs according to the embodiment of FIG. 5 enable a patient to perform a measurement run on a segmented display at home. If necessary, the patient can be examined in real time under guidance of an inspector or with accompanying.
Furthermore, it is provided according to an embodiment of the method or of the corresponding device according to the invention that after a first measuring run along the above-defined path, when a field of view loss is detected (i.e. when the current position 9 is detected, the test point becomes invisible and then visible again), a further, optionally detailed examination or another measuring run can be performed, scanning any detected field of view loss more accurately. This can be done in the manner described above (for example for smaller areas 92), in particular (partially) automatically (see fig. 9 to 11), and further with the support of an Artificial Intelligence (AI) based method (see fig. 12). Further, manual region inspection (see fig. 13) and even manual free inspection (see fig. 14) may be performed.
In detail, for example, the sections 91 along the path 7 detected during the first measuring run or standard run, which extend between two consecutive current positions 9, in which the test points 6 become invisible or visible again to the person P under examination, can be further specified in an automatic manner by checking the area around the relevant section 91 (potential occlusion area), for example, applying the following process steps:
A region 92 is defined around the section 91 (potential spot or defect region) detected during the first measurement, through which region the test spot is guided along the further path 70, the current position 9 (see fig. 9) at which the test spot 6 becomes invisible or visible again being detected again. After a further measurement pass along the further path 70 in the relevant region 92, the sections 91 lying in each case at the edge of the region 92 (new potential loss regions) are used as centers for the further region 92, these regions 92 being passed again until overlapping with the further sections 91 detected in the first measurement pass or in the further measurement pass (potential blind spot regions). This section 91 is also selected as the center of the region 92 which is traversed according to the same principle (see fig. 9 to 11).
As an alternative to this procedure, the section 91 (or potential spot or defect area) determined during the first measurement (see fig. 8) may be taken as the center of the area 92, respectively, in each case the test point 6 being guided along a further path 70, the current position 9 being stored again, at which position the test point 6 becomes invisible or visible again to the person P to be examined (see fig. 9 and 11).
In particular, these areas 92 are smaller in area than the area swept by the path 7 during the first measurement. In particular, the respective region 92 may cover a region around the respective center (section 91) which corresponds to a visual angle of 5 °, in particular 2.5 °, in particular 1 °, the distance between adjacent parallel sections 70a of the other path 70 being in each case 2.5 °, in particular 1 °, in particular 0.5 °.
With respect to further measurement runs, more human patient data may also be used, for example, for training artificial intelligence algorithms. In this way, potentially lost areas or segments 91 not found in previous inspection methods can be found. To this end, among other things, two basic artificial intelligence methods can be applied, namely, on the one hand, a statistical analysis based on the current position 9 stored in the examination area coordinate system (e.g., the (x, y) coordinates in the partitioned display or another partitioned display coordinate system), and, on the other hand, an image analysis of the visualized examination result, i.e., the area 90 whose edges are formed by the positions 9, for example. Based on the results of the artificial intelligence analysis of other people and the probability of potential defects/spots compared to other people, another area 92 may be automatically inspected where potential, unidentified sections 91 may be found. To this end, as described above, further measurement runs may be performed in the region 92 determined by artificial intelligence (see FIG. 12).
Furthermore, the respective region 92 may also be determined by an inspector, after which further measurement runs (automatically) may be performed along the further path 70 in the manner described above (see fig. 13).
Finally, the inspector can also determine or control the path 70 of further measurement runs in real time (see fig. 14).
In all of the above-described inspection methods or further measurement runs, the inspector can optionally influence or adjust the following inspection parameters, namely in particular:
the size or diameter of the test point 6 (e.g., the starting and ending sizes of the test point 6, and, if applicable, the change or rate of its size),
the speed 6 at which the test point is moved,
the direction (e.g. horizontal, vertical, diagonal, etc.) of the path 7, 70 to be traversed,
in the area 92 or on a segmented display or another display, several sections 70a of the path 7, 70 to be travelled.
Claims (33)
1. A method of measuring a field of view of a person (P) by a device (1), comprising the steps of:
o displaying a visually detectable test point (6) on a segmented display (2) of a device (1) for viewing a person (P) through the eyes, wherein the spatial position of the head of the person (P) relative to the segmented display (2)
Remain unchanged and
o during a measuring operation, moving along a path (7) by means of a test point (6) of the device (1) on the segmented display (2), along the path (7) when the displayed test point (6) is at a current position (9)
The device is triggered by the person (P) when it becomes invisible or visible again to the person (P) during movement
(1) Wherein the device (1) stores by triggering the interaction device (8)
The respective current position and the associated information from which it can be derived whether the test point (6) becomes invisible or visible again to the person (P) at the current position.
2. The method according to claim 1, wherein the method comprises the further step of:
-displaying an area (90) of the field of view of the information and/or person (P) on the segmented display (2) and/or the further segmented display (3), said current position forming an edge point of the area (90).
3. Method according to claim 1 or 2, wherein the test point (6) has a speed S/f in cm/S when moving on the display (2), wherein S is the distance the test point moves in cm, wherein f is a number in the range of 2 to 7, in particular in the range of 3 to 6, in particular in the range of 4 to 5, wherein f is in particular 4.7.
4. A method according to any of claims 1 to 3, wherein the distance (a) of the eyes of the person (P) from the segmented display (2) when moving the test point (6) along the path (7) is in the range of 10cm to 400cm, in particular in the range of 20cm to 200cm, in particular in the range of 30cm to 100cm, in particular in the range of 30cm to 50cm, in particular in the range of 35cm to 45cm, wherein the distance is in particular 40cm.
5. The method according to any of the preceding claims, wherein at least 500 to 50000 different positions, in particular at least 1000 to 25000 different positions, in particular at least 1500 to 10000 different positions, in particular at least 2500 different positions, in the field of view are tested by test points (6) during a measurement run within 1 minute, and/or wherein the total length of the path (7) is at least 17.625cm to 705cm, and/or wherein the total length of the path (7) is at least 35.25cm to 352.5cm, and/or wherein the total length of the path (7) is at least 52.875cm to 176.25cm, and/or
Or wherein the total length of the path (7) is at least 70.5cm, wherein the test point (6) is moved along the entire path (7) during the measurement for less than or equal to 1 minute.
6. The method according to any of the preceding claims, wherein the path (7) comprises a plurality of mutually parallel first sections (70), and/or wherein the path (7) comprises a plurality of mutually parallel second sections (71).
7. The method according to claim 6, wherein the first portion (70) intersects the second portion (71) such that, in particular, the first portion and the second portion define a grid.
8. The method according to any one of claims 6 to 7, wherein the test patch (6) is first moved along each of the first sections (70) and then along each of the second sections (71).
9. A method according to any one of claims 6 to 8, wherein the first section (70) extends vertically on the segmented display (2) and the second section (71) extends horizontally on the segmented display (2); or wherein the first section extends horizontally over the segmented display and the second section extends vertically over the segmented display.
10. The method according to any of the preceding claims, characterized in that the path (7) has at least one section (72) running in the vertical direction or inclined to the vertical direction; and/or the path (7) has at least one section extending in an arc, in particular a semicircle; and/or the path (7) has at least one section (72) extending through the nerve fiber (N) and in particular orthogonally to the nerve fiber (N).
11. Method according to claim 2 or to any of claims 3 to 11 within the scope of claim 2, wherein for visualizing the area (90) the current position (9) at which the test point (6) becomes invisible is connected to a line which is displayed on the other partial display (3) as a borderline of the area (90) and/or the current position (9) at which the test point (6) becomes visible is connected to a line which is displayed on the other partial display (3) as a borderline of the area (90), wherein in particular the area (90) enclosed by the borderline is displayed on the other partial display (3) optically distinguishable from the background of the other partial display (3).
12. Method according to claim 2 or to any of claims 3 to 11 in the scope of claim 2, wherein the inspection is performed by repeatedly guiding the test points (6) on the segmented display (2) from the detection area (90) to the surrounding area where the person can see the test points (6) under control of the inspector (U) and under human observation.
13. Method according to any of the preceding claims, wherein during a measurement run a central target (10) is displayed on the segmented display (2), in particular in the form of a cross, which central target is weaker than the test point (6) and is observed by the person (P) to fix the direction of observation of the person (P), wherein the device (1) detects during the measurement run whether the direction of observation of the person (P) deviates from the central target (10) and if a deviation is detected, the movement of the test point (6) is stopped, wherein in particular the diameter of the test point (6) decreases with decreasing distance from the central target (10).
14. Method according to claim 3 or to any of claims 4 to 13 in the scope of claim 3, wherein the speed of the test point (6) is temporarily slowed down according to the requirements of the inspector, in particular by interaction with a user interface of the device (1), in particular specifying the current position at which the test point (6) becomes invisible or becomes visible again.
15. A method according to any one of the preceding claims, wherein the method further comprises the step of: further measurement runs are performed on each section (91) of a path (7) of measurement runs extending between two adjacent stored current locations (9), in each case a test point (6) on the partitioned display (2) being moved by the device (1) along the other path (70) within a region (92) on the partitioned display containing the respective section (91) as a centre, and in each case an interaction device (8) of the device (1) being triggered by the person (P), when the displayed test point (6) becomes invisible or again visible to the person (P) during the movement of the current location (9) within the region (92) along the other path (70), wherein the device (1) stores the respective current location (9) of the test point (6) within the region (92) and the relevant information by triggering the interaction device (8), from which it is possible to derive whether the test point (6) of the current location (9) has been invisible or again visible to the person (P).
16. Method according to claim 15, wherein after a respective further measurement run of a section (91) of the further path (70) found in the respective region, said section in each case extending between two adjacent stored current locations (9) of the further path (70) and being located at the edge of the region (92), a further measurement run is performed until a section (91) previously found during the measurement run or during the further measurement run is detected in the process, wherein the further measurement run is also performed on said section (91).
17. Method according to any one of claims 1 to 14, wherein at least one area (92) is automatically selected by means of an AI algorithm, which algorithm has been trained with multiple data recordings of different persons, wherein a further measurement run is performed, in each case the test point (6) on the partitioned display (2) being moved by the device (1) along a further path (70) within the area (92) on the partitioned display, wherein in each case the interaction device (8) of the device (1) is triggered by a person (P), and when the displayed test point (6) moves along the further path (70) within the area, becomes invisible or visible again to the person (P) at the current position (9), wherein the device (1) stores the respective current position (9) of the test point (6) in the area (92) and the relevant information, from which it can be derived whether the test point (6) of the current position becomes invisible or visible again to the person (P) by triggering the interaction device (8).
18. The method of claim 17, wherein the AI algorithm is configured to select at least one region (92) based on records of different persons, wherein each record of a person comprises a stored current location (9) of the person, and/or to select at least one region (92) based on records of different persons, wherein each record corresponds to a visualized region (90) of the person.
19. The method according to any of the preceding claims, further comprising the step of: at least one further measurement run is performed on the area selected by the inspector, wherein the test points (6) on the segmented display (2) are moved by the device (1) along a further path (7) within the area on the segmented display, and in each case the interaction device (8) of the device (1) is triggered by the person (P) during the movement of the displayed test points (6) along the further path (7) within the area, becoming invisible or visible again to the person (P) at the current location (9), wherein the device (1) stores the respective current location of the test points in said area and the relevant information from which it can be derived whether the test point (6) of the current location is already invisible or visible again to the person (P) by triggering the interaction device (8).
20. The method according to any of the preceding claims, further comprising the step of: at least one further measurement run is performed, wherein the test point (6) on the segmented display (2) is moved by the device (1) along a further path (70) under the control of the inspector, and in each case when the displayed current position (9) of the test point (6) within the area becomes invisible or visible again to the person (P) during the movement along the further path (70), the person (P) triggers the interaction device (8) of the device (1), wherein the device (1) stores the respective current position of the test point within said area and the relevant information by triggering the interaction device (8), from which it can be derived whether the test point (6) has been invisible or visible again to the person (P) at the current position.
21. The method according to claim 2 or any of claims 3 to 20 within the scope of claim 2, wherein the content of the partitioned display (2) is transmitted to the other partitioned display (3) via a data transmission link (V), and/or wherein the content of the other partitioned display (3) is transmitted to the partitioned display (2) via the data transmission link (V).
22. The method according to any of the preceding claims, wherein the device (1) comprises a processing unit (5, 55), in particular for displaying and moving visually detectable test points (6) on a segmented display (2).
23. Method according to claim 22, wherein the processing unit (5) is a local processing unit located at the person (P) location, and the respective current location and related information are stored on the local processing unit (5) and transmitted to the further processing unit (55) via a data transmission link (V) and evaluated on the further processing unit (55) to generate the result data set.
24. The method according to claim 22, wherein the processing unit is a local processing unit located at the person (P) location, and wherein the respective current location and related information are stored on the local processing unit (5) and evaluated on the local processing unit (5) to generate a result dataset, wherein the result dataset is selectively transmitted to another processing unit (55) via a data transmission link (V).
25. The method according to claim 22, wherein the device (1) further comprises a local processing unit (5) located at the person (P) location, which is connected to the partition display (2), wherein the processing unit (55) causes the visually detectable test points on the partition display (2) to be displayed and moved to the local processing unit (5) via the data transmission link (V), wherein the respective current location and the related information are stored on the processing unit (55) and evaluated to generate the result data set.
26. A computer program comprising instructions which, when executed on a processing unit, cause the processing unit to perform the steps of the method according to any of claims 22 to 25.
27. Device (1) for measuring a field of view of a person, comprising:
a segmented display (2) configured to be viewable by a person (P),
a processing unit (5, 55) configured to display the test point (6) to the person (P) on the segmented display (2) and to move the test point along a predetermined path (7) on the segmented display (2),
-an interaction device (8) configured to be triggered by the person (P) when the displayed test point (6) becomes invisible to the person (P) or becomes visible again at the current position during its movement along the path (7), wherein the processing unit (5) is configured to store the respective current position and related information from which it can be derived whether the test point (6) becomes invisible to the person (P) or becomes visible at the current position when the interaction device (8) is triggered.
28. The device according to claim 27, wherein the device (1) comprises a further partitioned display (3) configured to be viewed by an inspector (U).
29. The device according to claim 28, wherein the processing unit (5) is further configured to display an area (90) of the field of view of the person (P) on another partitioned display (3), the current position (9) forming an edge point of the area (90).
30. The device according to any of claims 27 to 29, wherein the device (1) comprises a fixation unit (4) configured to fix the position of the head of the person (P) relative to the segmented display (2).
31. The device according to any one of claims 27 to 30, wherein the device (1) comprises a further processing unit (55), and wherein the processing unit (5) is configured to transmit the current location and the related information to the further processing unit (55) via a data transmission link (V), wherein the further processing unit (55) is configured to evaluate the current location and the related information to generate a result data set.
32. The device according to any one of claims 27 to 30, wherein the device (1) comprises a further processing unit (55), and wherein the processing unit (5) is configured to evaluate the current location and related information to generate a result data set and to transmit the result data set to the further processing unit (55) via a data transmission link (V).
33. The device according to any one of claims 27 to 30, wherein the device further comprises a local processing unit (5) located at the location of the person (P), which processing unit is connected to the partition display (2), wherein the processing unit (55) causes the visually detectable test points on the partition display (2) to be displayed and moved to the local processing unit (5) via the data transmission link (V), wherein the respective current location and the related information are stored on the processing unit (55) and evaluated to generate a result data set.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP21151704.0 | 2021-01-14 | ||
| EP21176171.3 | 2021-05-27 | ||
| EP21196409.3 | 2021-09-13 | ||
| EP21196409 | 2021-09-13 | ||
| PCT/EP2022/050765 WO2022152861A1 (en) | 2021-01-14 | 2022-01-14 | Method and device for measuring the visual field of a person |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116709969A true CN116709969A (en) | 2023-09-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202280009961.1A Pending CN116709969A (en) | 2021-01-14 | 2022-01-14 | Method and device for measuring the visual field of a person |
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| Country | Link |
|---|---|
| CN (1) | CN116709969A (en) |
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2022
- 2022-01-14 CN CN202280009961.1A patent/CN116709969A/en active Pending
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