CN209826666U - Non-contact type perimeter based on feedback interaction of display equipment - Google Patents

Abstract

The utility model relates to a non-contact perimetry based on the feedback interaction of a display device, which comprises an inspection terminal display, an eye movement collection module, a processing module and an input module, and the inspection terminal display, the eye movement collection module, and the input module are all connected with the processing module electrical connection; wherein, the inspection terminal display is used to alternately present the fixation point and the stimulation point, the eye movement collection module is used to collect the eye movement information generated by the subject during the inspection process, and the processing module is used to obtain the eye movement information according to the eye movement information. Check out the results. Compared with the standard perimetry, this new type of perimetry is small in size and good in portability, which makes the perimetry easier to popularize. At the same time, it uses eye movement technology to realize non-contact interaction and fully automatic feedback interaction, which simplifies the operation process and broadens the field of vision. Age-appropriate range for visual field testing.

Description

A non-contact perimetry based on display device feedback interaction

technical field

The utility model relates to the technical field of ophthalmic examination, in particular to a non-contact perimetry based on feedback interaction of a display device.

Background technique

Perimeter is a professional instrument used to measure the visual field range of the eyeball and conduct medical ophthalmic nerve tests. It is commonly used in clinical visual field inspection to assist in the diagnosis of various eye diseases with visual field defect symptoms, such as glaucoma, retinitis pigmentosa, and retinal detachment. It is an indispensable auxiliary diagnostic instrument in the field of medical ophthalmology.

Static visual field refers to the peripheral space area that can be seen when the eyeball is fixed to the front and does not move. Clinically, the central 30° static visual field test results are used as the main auxiliary diagnosis basis for visual field defect diseases. Most clinics and hospitals currently use a standard automated perimetry (as shown in Figure 1) for visual field testing. Before the examination, the subject needs to properly adjust the relative height between the person and the equipment and fix the head at the designated position. At this time, the subject is in front of a white hemispherical field of view screen, which is implanted with LED lights at different positions. Stimulating light spots with variable position and intensity can be presented by changing the voltage at both ends. During the inspection, the subject needs to keep fixating on the central point in front of him all the time. At regular intervals, a stimulus visual target with a specific stimulus intensity appears at a certain point on the visual field screen. If the visual target is visible, the subject needs to maintain the fixation state. Manually trigger the responder until the visual field sensitivities of all visual field sites are checked, and the visual field inspection ends. Although standard perimetry can perform visual field inspection, there are two major defects that make visual field inspection difficult to popularize:

1. Large size and poor portability

Medical standard perimetry covers an area of more than 1 square meter, weighs hundreds of kilograms, has poor portability, and usually requires a fixed place of use; and is composed of sophisticated optical modules and mechanical mechanisms (for example, the Holes are drilled at specific sites and LED lights are implanted), and the manufacturing and transportation costs are high. The above two reasons make visual field testing difficult to popularize in grass-roots hospitals, various vision testing institutions, schools, families, etc., for timely detection of potential visual field defect patients in the general population, timely early intervention treatment and prognosis follow-up for glaucoma and other visual field defect diseases Work is a major hindrance.

2. Complex interaction and poor user experience

For the subjects, there are mainly three problems: first, the head needs to be fixed on the chin rest before the visual field test, which reduces the comfort of use; second, the test must continue to watch the fixation point of the screen, that is, it is necessary to maintain the line of sight Not to be attracted by the stimuli that appear around the visual field requires the subject to have good self-control; third, when a certain stimulus is visible, the subject needs to press the responder quickly while fixing the sight, The operating ability of the subjects is required to be high. Combined with the second and third points, the standard visual field inspection method cannot be well applied to the elderly, children, and some disabled people who are not easy to operate.

Utility model content

The purpose of the utility model is to improve the above-mentioned deficiencies existing in the prior art, and to provide a non-contact perimetry based on the feedback interaction of the display device.

In order to achieve the purpose of the above-mentioned utility model, the embodiment of the utility model provides the following technical solutions:

A non-contact perimetry based on the feedback interaction of the display device, including an inspection terminal display, an eye movement collection module, a processing module and an input module, and the inspection terminal display, the eye movement collection module, and the input module are all electrically connected to the processing module; The inspection terminal display is used to alternately present fixation points and stimulation points, the eye movement acquisition module is used to collect eye movement information generated by the subject during the inspection process, and the processing module is used to obtain inspection results based on the eye movement information.

In a further optimized solution, the inspection terminal display is covered with a shading cover. Through the setting of the hood, light interference can be avoided and the accuracy of inspection results can be improved.

In a further optimized solution, a monitor at the supervisory end electrically connected to the processing module is also included for displaying the status information of the subject during the examination. Through the setting of the monitor at the monitoring end, it is convenient for medical staff to observe the effectiveness of the inspection process, so as to remind the subjects when necessary.

In one embodiment, the eye movement collection module includes an infrared light source and an image sensor, the infrared light source is used to emit infrared light to the subject's eyeball, and the image sensor is used to collect the subject's eyeball when being detected Eye movement information after irradiation with infrared light. Infrared light sources can be one or more. The infrared light source is preferably arranged below the display at the inspection end. This setting not only facilitates the collection of eye movement information, but also does not take up extra space.

Compared with the prior art, the utility model has the beneficial effects:

1. Good portability. The perimetry hardware part proposed by the utility model is composed of at most two display devices, a processor, an eye movement module and a shading cover. Compared with the standard perimetry, the volume is small and the portability is good, so that the perimetry is easy to popularize and convenient. Early screening for patients with relatively hidden visual field defects in the normal population, and relevant treatment and rehabilitation evaluation for glaucoma and other visual field defect diseases.

2. Non-contact automatic feedback based on eye movement technology, making the interaction more friendly. The vision meter proposed by the utility model uses the display device as a presentation platform for visual field stimulus visual targets, and does not require the subject to fix the head position; at the same time, eye movement technology is used to realize non-contact interaction, that is, the visible visual stimulus visual targets in the visual field are naturally scanned by eyeballs Instead of button interaction, after a series of stimulus visual targets are presented, the visual field range of the subject is automatically calculated through the eye movement data. The inspection process does not require any manual input, realizing fully automatic feedback interaction, and does not need to maintain a high degree of visual fixation throughout the inspection , Simplify the operation process and broaden the age-appropriate range of visual field examination.

3. The detection result is stable and reliable. The visual field inspection carried out by the perimetry based on the display device proposed by the utility model adopts the eye movement interactive mode, which effectively utilizes the human stress instinct to generate eye movement data, so that the result is stable and reliable, and it is not easy to be deviated due to the subject's subjective factors (such as In the standard visual field test, the subject may press the responder by mistake), which improves the efficiency and level of the visual field test.

Description of drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following drawings will be briefly introduced in the embodiments. It should be understood that the following drawings only show some embodiments of the present invention. Therefore, it should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained according to these drawings without creative work.

Fig. 1 is a schematic structural diagram of a standard automatic perimetry in the prior art.

Fig. 2 is a schematic diagram of the appearance and structure of the non-contact perimetry based on the feedback interaction of the display device in the embodiment.

Fig. 3 is a schematic diagram of the constituent modules of the non-contact perimetry based on the feedback interaction of the display device in the embodiment.

Marking description in the figure

Inspection end display 1, computer host 2, eye movement acquisition module 3, light shield 4, supervision end display 5, input device 6.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. . The components of the embodiments of the invention generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without making creative efforts belong to the scope of protection of the present utility model.

Please refer to FIGS. 2-3 , this embodiment provides a non-contact perimetry based on display device feedback interaction, including a storage module, a display module, an input module, an eye movement collection module and a processing module. During the visual field test, the storage module is used to store visual field test software system instructions and test-related data; the display module is used to display the program interface (mainly used to alternately display the fixation point and the stimulation point of a specific location and stimulation intensity), and may be used for Display or play the required prompt information; the input module is used to control the process of the program (such as exiting the visual field test program); the eye movement collection module is used to collect the real-time eye movement information of the subject during the visual field test (such as the gaze track , fixation point, etc.), within each stimulus point occurrence cycle, compare the above eye movement information with the current stimulus point preset information (such as the position of the stimulus point on the screen), and when the similarity reaches a certain threshold, determine the input The information is that the current stimulus point is visible to the subject, otherwise it is invisible, and the input information is sent to the processing module; the processing module performs the background operation of the program to determine the position, color, and stimulation point of the stimulus point within the cycle of each stimulus point Intensity and other information are sent to the display module for display, and the results of this inspection are given according to the current inspection data (and historical visual field inspection results, and subject information) after the inspection is over. Communication between devices (for example, an external printer).

For the above-mentioned eye movement acquisition module, a possible eye movement acquisition method is: emit at least one set of infrared light to at least one eyeball of the subject, generate reflection on the cornea and pupil of the subject's eye, and collect the infrared rays through the image sensor The cornea-pupil vector on the eye reflection image to obtain eye movement information. Before using the eye movement acquisition module to perform the above visual field inspection, the subject needs to perform eye movement calibration on the inspected eye and ensure that the accuracy of the calibration data reaches a certain standard. The calibration methods are optional: 9-point calibration, 5-point calibration, and 3-point calibration , 1-point calibration and free calibration, etc.; if eye movement calibration has been performed not long before the visual field test, it is necessary to check whether the calibration data is available.

According to whether the real-time data in the visual field inspection process needs to be displayed to the supervisor for viewing, the perimetric perimeter proposed by the utility model can be divided into two hardware structures: non-supervised type and supervised type.

①Non-supervised type: In this mode, the hardware structure of the perimetry includes at least one display device (such as a liquid crystal display) as the inspection terminal, a processor (such as a computer host), an eye movement acquisition module, and a light-shielding monitor set on the inspection terminal. cover and input devices (eg keyboard, mouse). The eye movement acquisition module is mainly composed of an infrared light source (indicated by two gray circles on the display 1 of the inspection side in Figure 2) and an image sensor. It can be an external hardware or a display embedded module. When it is an external hardware, it usually Place it under the display device, and adjust its placement angle so that the infrared light source can be sent to the eye under test. The light shield is used to ensure that the stimulus intensity of the stimulus point presented on the display device is hardly disturbed by external ambient light. Input devices are primarily used for program progress control.

②Supervised mode: In this mode, the hardware structure of the perimeter meter is based on the non-supervised mode, and at least one display device is added as the supervisory terminal, and the input device is configured as required. During the above-mentioned visual field inspection process, the display device at the inspection end alternately presents fixation points and stimulation points, and the display device at the supervision end displays some subject status information (such as pupil size, eyeball image, etc.) , system administrator, etc.) to properly control the test process (for example, when persistent vision loss is found according to the eyeball image, the supervisor will remind the subject in time). The input device should be at least configured on the monitor display device for program process control.

It should be noted that in this embodiment, there is no more detailed description of the inspection method of the perimetry provided by the utility model, because the inspection method of the perimetry is not improved in this embodiment, and the method of the standard perimetry is still used. However, compared with the standard perimetry, the perimetry in this embodiment has the following advantages in terms of hardware structure:

1. Has the advantage of portability

The perimetry hardware part proposed by the utility model is composed of at most two display devices, a processor, an eye movement acquisition module and a shading cover. Compared with the standard perimetry, it is small in size and good in portability, making the perimetry easy to popularize. It is convenient for early screening of patients with hidden visual field defects in the normal population, and relevant treatment and rehabilitation evaluation for glaucoma and other visual field defect diseases.

2. Non-contact automatic feedback interaction based on eye movement technology is more friendly

The vision meter proposed by the utility model uses the display device as a presentation platform for visual field stimulus visual targets, and does not require the subject to fix the head position; at the same time, eye movement technology is used to realize non-contact interaction, that is, the visible visual stimulus visual targets in the visual field are naturally scanned by eyeballs Instead of button interaction, after a series of stimulus visual targets are presented, the visual field range of the subject is automatically calculated through the eye movement data. The inspection process does not require any manual input, realizing fully automatic feedback interaction, and does not need to maintain a high degree of visual fixation throughout the inspection , Simplify the operation process and broaden the age-appropriate range of visual field examination.

3. The test result is stable and reliable

The visual field inspection carried out by the perimetry based on the display device proposed by the utility model adopts the eye movement interactive mode, which effectively utilizes the human stress instinct to generate eye movement data, so that the result is stable and reliable, and it is not easy to be deviated due to the subject's subjective factors (such as In the standard visual field test, the subject may press the responder by mistake), which improves the efficiency and level of the visual field test.

The above is only a specific embodiment of the present utility model, but the scope of protection of the present utility model is not limited thereto. Anyone familiar with the technical field can easily think of changes or changes within the technical scope disclosed by the utility model Replacement should be covered within the protection scope of the present utility model.

Claims (7)

1. A non-contact type perimeter based on feedback interaction of display equipment is characterized by comprising an inspection end display, an eye movement acquisition module, a processing module and an input module, wherein the inspection end display, the eye movement acquisition module and the input module are all electrically connected with the processing module; the examination end display is used for alternately presenting a fixed viewpoint and a stimulation point, the eye movement acquisition module is used for acquiring eye movement information generated by a subject in an examination process, and the processing module is used for obtaining an examination result according to the eye movement information.

2. The non-contact perimeter based on feedback interaction of display devices as claimed in claim 1, wherein said inspection end display is sleeved with a light shield.

3. The non-contact perimeter based on feedback interaction of display device of claim 1, further comprising a monitor end display electrically connected to the processing module for displaying status information of the subject during the examination.

4. The non-contact perimeter based on feedback interaction of display device of claim 1, wherein said eye movement collection module comprises an infrared light source and an image sensor, said infrared light source is used for emitting infrared light to the eyeball of the subject, said image sensor is used for collecting the eye movement information of the eyeball of the subject after being irradiated by said infrared light.

5. The non-contact perimeter of claim 4, wherein the infrared light source is located below the inspection end display.

6. The non-contact perimeter based on feedback interaction of display devices of claim 1, wherein said processing module is a host computer.

7. A display device based feedback interaction touchless perimeter according to claim 1, wherein said input module is a keyboard and/or mouse.