JPH1028675A - Self-conscious type optometer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device which can determine a prescription for an optometrical lens by adjusting a degree of power. SOLUTION: A manipulating unit 20 for a self-conscious type optometer device 1 comprises an input part 26 incorporating a plurality of input keys, a memory part 25 for storing an optometry program, data and the like, and a main control circuit 27 for controlling the operation of a measuring unit 20 and an optotypes device 4, and calculating a prescription. Further, the optometry program is composed of an inquiry mode for carrying out an inquiry for a person to be examined, a complete correction power degree measuring mode for measuring a complete correction power degree in combination of an index exhibited by the optotypes device 4 and an auxiliary lens mounted on the measuring unit 10, and a power degree adjusting mode for adjusting a complete correction power degree with the use of an adjusting factor determined from measured data obtained during prosecution of the both modes in order to determine so as to determine a prescription.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a subjective optometry apparatus capable of subjectively measuring an eye of a subject.

[0002]

2. Description of the Related Art As a conventional subjective optometry apparatus, for example, one described in Japanese Patent Application Laid-Open No. Hei 2-307425 is known. In this type of subjective optometry device, a plurality of lenses are combined and presented to the measurement window, and the subject is shown an optotype through this, and by changing the lens combination stepwise while checking the appearance, The measurement of the eye refractive power and the like of the subject is performed subjectively.

In order to obtain a prescription example of spectacles using a conventional subjective optometry apparatus, a so-called perfect correction power is measured by detecting the weakest power at which the subject can obtain the highest visual acuity, and the perfect correction power is measured. Pseudo spectacles that combine lenses called optometry lenses based on the prescription. Furthermore, the examinee wears the prescribed optometry lens to check the feeling of wearing.

[0004] This is because the auxiliary lens of the subjective optometry apparatus has a difference in that the effective diameter is smaller than that of a normal spectacle lens, and a plurality of lenses are combined to generate a lens power. In addition, it is considered that more appropriate prescription of spectacles is possible by confirming a feeling of wearing with an optometry lens in a state close to a normal spectacle lens.

[0005] By the way, when a wear test using an optometry lens is performed, if an optometry lens having the same power as the completely corrected power measured by a conventional subjective optometry apparatus is used, the problem that the eyes become tired due to excessive visibility occurs. There are many. This is a symptom that occurs when the spectacle power is determined without considering the subject's spectacle history (e.g., history of use of spectacles and changes in lens power).

For this reason, conventionally, the measured perfect correction power is not used as it is, but is adjusted so as to be suitable for each individual subject, and the feeling of wearing is checked with an optometry lens of the power obtained as a result of the adjustment. ing.

[0007]

However, when adjusting the perfect correction power so as to be suitable for an individual subject, conventionally, each examiner adjusts the power based on his or her own experience, or A method of quantitatively determining each of a plurality of factors relating to frequency adjustment (hereinafter, referred to as frequency adjustment factors) using a mathematical formula and performing frequency adjustment based on the result has been adopted.

In particular, when an inexperienced examiner prescribes eyeglasses, complicated calculations must be performed in order to quantitatively consider various power adjustment factors. For this reason, the frequency adjustment processing becomes very troublesome, and there is a case where a load is imposed on the subject due to a wrong calculation or a long time for determining the frequency.

An object of the present invention is to provide a subjective optometry apparatus capable of determining a prescription for an optometry lens. It is another object of the present invention to provide a subjective optometric apparatus that can perform frequency adjustment irrespective of the examiner's experience and can further reduce the burden on the examinee.

[0010]

In order to achieve the above-mentioned object, the present invention provides a subjective optometric apparatus for performing an optometry along a predetermined examination procedure, wherein the predetermined examination procedure is performed stepwise. The optometry is performed, the optometry performing means for determining the complete correction power of the eye of the subject, and the power adjustment factor used in the calculation of the prescription example of the optometry lens based on the data obtained during the execution of the optometry are determined. A prescription example calculating means for calculating a prescription example of the optometric lens using the power adjustment factor and the perfect correction power.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a subjective optometry apparatus to which the present invention is applied will be described below with reference to the drawings.

In this embodiment, the subjective optometry apparatus 1
As shown in FIG. 1, during the optometry operation, the optometry is performed in conjunction with the visual acuity table device 4, the lens meter 2 that measures the power of the old glasses of the subject, the naked eye power of the subject, and the like. Is interfaced with an objective optometry device 3 that objectively measures the measurement data, and measurement data can be transferred from each device.

The subjective optometry apparatus 1 performs an examination in accordance with a predetermined optometry program, and finally determines the power of the optometry lens used in the wearing test. The optometry program is a medical examination mode in which a medical examination is performed on a subject, a complete correction power measurement for measuring a complete correction power by combining a target presented to the visual acuity chart device 4 and an auxiliary lens loaded in the measurement unit 10. A mode, and a prescription example is determined by performing a frequency adjustment of the completely corrected power using a frequency adjustment factor determined based on data obtained during the processing of both modes, and a prescription example is determined. It comprises a power adjustment mode for determining the power of the optometry lens based on the power adjustment mode. The processing procedure in each mode will be described later.

In the present embodiment, the power adjustment factor is a plurality of predetermined evaluation items for grasping the current state of the subject's eye including the history of eyeglass use of the subject. It refers to the age range of the subject, the difference between the completely corrected power and the glasses worn before, the left and right difference of the completely corrected power, and the like. In the present embodiment, as described below, each power adjustment factor data is determined based on measurement data (data obtained in the inquiry mode or the complete correction power measurement mode) obtained by executing the optometry program, and this determination is performed. Using the power adjustment factor data obtained, a correction value to be used when determining a prescription example from the complete correction power of the eye to be examined is obtained.

As shown in FIGS. 1 and 2, the subjective optometry apparatus 1 includes a measurement unit 10 having measurement windows 11L and 11R into which auxiliary lenses used for optometry are respectively mounted.
And an operation unit 20 that receives an instruction from the examiner and controls the optotype presenting operation of the measurement unit 10 and the optotype chart device 4 to be interlocked according to the instruction, and a signal cable 8 that connects the two units. .

The operation unit 20 includes an input section 26 having a plurality of input keys provided corresponding to a plurality of types of instruction contents, a display section 21 including a liquid crystal panel and a drive section thereof, and a semiconductor memory. A memory unit 25 configured with elements, a hard disk device, and the like, and stores a control program and data necessary for operation of the subjective optometry apparatus 1.
And a main control circuit 27 that is implemented by, for example, a CPU and controls the operation of the measurement unit 20 and calculates a prescription example according to a program stored in the memory unit 25.
And an interface circuit 28 for interfacing with the lens meter 2, the objective optometry apparatus 3, and the eye chart apparatus 4.

The input section 26 is provided with a plurality of keys for inputting various instructions to the eye chart table device 4.
1, an optometry key unit 265 including a plurality of keys for controlling the auxiliary lens loading operation in the measurement unit 10 and inputting various instructions in the complete correction power measurement mode, and a numeric keypad unit 264 for inputting numerical values. And a forward key 266b and a return key 266a for instructing the progress and retreat of various processing operations in the subjective optometric apparatus 1.

The input unit 26 further includes an inquiry key 263 for instructing the start of processing in the inquiry mode, and a plurality of types of frequencies obtained or determined for the eye to be examined by the optometry program of the subjective optometry apparatus 1. It has a plurality of power switching keys 262 for selecting one and mounting an auxiliary lens corresponding to the selected power.

In the present embodiment, the power switching key unit 262 includes an old spectacle key 262a for mounting an auxiliary lens corresponding to the power of the spectacles (old spectacles) previously worn by the subject, an objective optometry. The objective key 262b for mounting the auxiliary lens having the power corresponding to the objective data measured for the naked eye of the subject by the apparatus 3, and the auxiliary lens having the perfect correction power determined by the process in the full correction power measurement mode is mounted. And a power adjustment key 262d for loading an auxiliary lens corresponding to the power of the optometry lens determined after performing the prescription example adjusted in the power adjustment mode or final fine adjustment. .

The display unit 21 includes the measuring unit 10
In this case, the power of the auxiliary lens loaded in the camera is displayed, or the contents of a question to be asked to the subject in the inquiry mode processing and an example of an expected answer to the question are displayed.

As shown in FIG. 3, for example, the memory section 25 stores a program storage section 251 for storing various programs for defining control procedures and the like, and a measurement section for storing measurement data and the like in an inquiry mode and a complete correction power measurement mode. A data storage unit 252, a frequency adjustment factor data storage unit 253 that stores frequency adjustment factor data obtained from the inquiry mode or the complete correction frequency measurement mode, and a pre-set of the frequency adjustment factor data and the correction value used for calculating the prescription example. A correction value database 254 for storing the determined correspondence.

The program storage unit 251 defines, for example, a control program 251a that defines a control procedure, an optometry program 251b that defines an optometry procedure, and a calculation procedure of each item of a power adjustment factor and a calculation procedure of a prescription example. The frequency adjustment factor / prescription example calculation program 251c is stored.

The measurement data storage section 252 stores data acquired by executing the optometry program. For example, the measurement data in each mode, the complete correction power,
The correction value for power adjustment, the prescription example determined from the perfect correction power and the correction value, and the power of the optometry lens finally determined are stored.

The frequency adjustment factor data storage unit 253 stores the measurement data and each frequency adjustment factor data obtained in accordance with the calculation procedure of the calculation program 251c.

The data stored in the frequency adjustment factor data storage unit 253 or the measurement data storage unit 252 of the memory unit 25 may be stored as a data file for each subject. According to such a configuration, at a later date,
This data can be used as a history of the subject's examination when a reexamination, etc. is performed, and, if necessary, a frequency adjustment process using not only current data but also past data Becomes possible.

The measuring unit 10, as shown in FIG.
An interface circuit 12 for receiving various control commands sent from the operation unit 20, a plurality of drive mechanisms 15a to 15n for performing an operation of loading an auxiliary lens, opening and closing shutters of the measurement windows 11R and 11L, and a drive mechanism 15a
To 15n, a motor drive circuit 14 for controlling a motor included as an actuator, and a main control circuit 13 for controlling the motor drive circuit 14 according to a control command received via the interface circuit 12.
And

Next, a procedure for prescribing spectacles and an operation of the subjective optometric apparatus 1 in the present embodiment will be described with reference to a flowchart of FIG.

If the subject already wears spectacles, the power of the old spectacles is measured by the lens meter 2 before the optometry by the subjective optometry apparatus 1 (step 1). In addition, objective measurement of the naked eye frequency of the subject is performed using the objective optometer 3 (step 2).

When the measurement in steps 1 and 2 is completed,
An optometry program using the subjective optometry apparatus 1 is executed. In this optometry program, processing in an inquiry mode (step 3), processing in a complete correction power measurement mode by subjective measurement (step 4), and power adjustment mode for calculating a prescription example and determining the power of an optometry lens are performed. Processing (step 5) is performed.

Finally, a wearing test (step 6) is performed in which the subject actually wears the optometric lens having the power determined in step 5 above, and the prescription of the eyeglasses is determined.

In the subjective optometry apparatus 1 of the present embodiment, the program storage unit 251 of the memory unit 25 of the operation unit 20
The above steps 3 to 5 are executed according to the optometry program 251b stored in. Hereinafter, each of the above procedures will be specifically described.

In the present embodiment, the optometry program 251
The inquiry mode b is activated by first pressing the inquiry key 263 or the feed key 266b (see FIG. 2) of the operation unit 20, and the process is started (step 3 in FIG. 4).

In this inquiry mode, the display unit 21 of the operation unit 20 displays, for example, a question 21a to be asked to the subject and an answer group 21b predicted for the question as shown in FIG. Is displayed. The examiner asks the examinee a question according to the displayed contents, and inputs the answer number corresponding to the examinee's response from the displayed answer group 21b using the numeric keypad 264 or the like.

Question 2 to be displayed on the display unit 21
1a includes, for example, the age of the subject, the history of spectacles, the purpose of using spectacles, and the like, which can be obtained by an inquiry from a plurality of frequency adjustment factors. The answer number corresponding to the input response of the subject may be, for example, the enter key 26 after the input of the answer number.
4a is pressed, the measurement data storage unit 252
Sent to and stored.

In the inquiry mode, when the enter key 264a is pressed, the process proceeds to the next inquiry item, and the input of the last inquiry item is completed and the enter key 264 is entered.
When a is pressed, the system automatically enters the next step, the complete correction power measurement mode (step 4 in FIG. 4).

In the complete correction power measuring mode, by pressing the feed key 266b of the operation unit 20, the optotype of the visual acuity chart apparatus 4 connected via the interface circuit 28 is changed in accordance with a preset inspection procedure. At the same time, the auxiliary lens used for measurement is
It is automatically loaded into the zero viewing windows 11R and 11L and enters the measurement state.

The examiner operates the power adjustment keys 265a, 265b and the like of the optometry key unit 265 to perform measurement, and advances the measurement item step by step using the feed key 266b. In the present embodiment, the specific measurement procedure is not limited, and for example, a red / green optotype test, a cross cylinder (axiality) test, a cross cylinder (frequency) test, a measurement of the maximum visual acuity value, and the like. By performing a well-known measurement procedure, such as one after another, the complete correction power of the subject is measured.

When the complete correction power measurement mode is completed and the complete correction power of the subject is determined, the measured data such as the determined complete correction power is stored in the measurement data storage unit 252, and then the power adjustment is performed. The mode is entered (step 5 in FIG. 4).

The processing in the frequency adjustment mode is executed, for example, according to the procedure shown in the flowchart of FIG.

In step 61, the data previously obtained by the lens meter 2 and the objective optometer 3 connected to the subjective optometer 1 via the interface circuit 28, and the data obtained at the time of the interview in step 3 , Step 4
The measurement data such as the data obtained during the execution of the optometry program is read from the measurement data storage unit 252. Here, the measurement data refers to, for example, age, spectacle calendar, spectacle use purpose, old spectacle data, complete correction value, objective ophthalmoscope measurement data, and the like as shown in FIG. 7A.

In step 62, frequency adjustment factor data as shown in FIG. 7B is obtained based on the measured data, and stored in the frequency adjustment factor data storage unit 253. As the power adjustment factor data, for example, age, spectacle history, spectacle use purpose, difference in spherical power between completely corrected value and old spectacle data, left and right difference in spherical power of perfect corrected value, astigmatism between perfect corrected value and old spectacle data There are a difference in power (astigmatic axial power), a left-right difference in astigmatic power of the perfect correction value, an equivalent spherical power of a difference between the perfect correction value and objective ophthalmoscope measurement data, and the like. The values in FIG.
This is determined based on the value of the measurement data shown in (a).

In the present embodiment, as for some frequency adjustment factor data, the value of the measured data or the value obtained by calculating the measured data is not used as it is, but a plurality of values whose values are set in advance are used. Is determined as a value. For example, regarding the age, it is determined whether the age of the subject belongs to any of a plurality of predetermined age ranges (for each generation), rather than using the age of the subject as it is.

In step 63, the correction value (FIG. 7C) corresponding to the combination of the frequency adjustment factor data obtained as described above (FIG. 7B) is obtained by using the correction value database 254. decide. Here, it is assumed that correction values corresponding to various combinations of values of the frequency adjustment factor data are set in the correction value database 254 in advance. Therefore, in this step, the above step 6
The same combination as the combination of the frequency adjustment factor data determined in 2 is searched from the correction value database 254, and the correction value corresponding to the searched combination is set as the correction value corresponding to the frequency adjustment factor. .

In step 64, the prescription example (FIG. 7 (d)) is added by adding values for the corresponding elements of the correction value determined in step 63 and the complete correction power.
Is calculated, and the calculation result is displayed on the display unit 21 as a prescription example. Further, the measurement unit 10 is controlled so that the measurement windows 11R and 11L are loaded with auxiliary lenses having the power corresponding to the prescription example.

When the auxiliary lens corresponding to this prescription example is loaded, the examiner starts final fine adjustment while checking the appearance of the subject.

In step 65, various instructions input by the examiner are sequentially received in accordance with the fine adjustment, and when the auxiliary lens determined by the examiner to be the most suitable is finally loaded, for example, the enter By pressing the key 264 or the like, the power of the optometry lens is determined.

In this step, when the power addition / decrement keys 265a and 265b are pressed for fine adjustment of the power, the prescription example determined in step 64 is used as an initial value, and the time during which each power addition / depression key is pressed or The power is adjusted by an amount corresponding to the number of times, and the auxiliary lens having the resulting power is loaded in the measurement window 11. Further, the power of the loaded auxiliary lens is displayed on the display unit 21.

Also, the old glasses key 262a and the objective key 26
2b, when the complete correction key 262c or the power adjustment key 262d is pressed, auxiliary lenses corresponding to the respective powers are loaded in the measurement windows 11R and 11L. By operating these power switching keys 262a to 262d, it is possible to easily compare the appearance of old glasses or the like with the lens of the power obtained as a result of the optometry, so that the accuracy of the prescription is improved and the wearing test ( Step 6) can be performed smoothly.

When the power of the optometry lens is determined by the above-described procedure, the lens having that value is mounted on the test frame, and the subject is worn by the subject to perform a wearing test.

In the wearing test, in addition to checking the visual appearance by seeing the optotype, the wearing feeling is checked in a state suitable for actual use such as walking while wearing the target. Fine adjustment of the frequency as performed in step 65 of FIG. 6 is performed. When the wearing test is completed, the value is determined as a prescription value, and eyeglasses are manufactured.

According to the subjective optometry apparatus of this embodiment, even an inexperienced examiner can determine a prescription example for an optometry lens and can smoothly adjust the power. Furthermore, since the time required for optometry can be reduced,
It is also possible to reduce the burden on the subject, and it is also possible to suppress variations in frequency adjustment by the examiner.

[0052]

According to the present invention, it is possible to provide a subjective optometric apparatus capable of determining a prescription example for an optometric lens.

Further, according to the present invention, when deciding on a prescription example, a subjective optometry apparatus capable of performing power adjustment regardless of the experience of the examiner and further reducing the burden on the examinee. Can be provided.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of an embodiment of a subjective optometry apparatus according to the present invention.

FIG. 2 is a front view showing the shape of an embodiment of a subjective optometry apparatus according to the present invention.

FIG. 3 is a block diagram illustrating a configuration example of a memory unit of the device in FIG. 1;

FIG. 4 is a flowchart showing an example of a prescription procedure for glasses.

FIG. 5 is an explanatory diagram showing an example of display on a display unit in an inquiry mode.

FIG. 6 is a flowchart illustrating an example of a processing procedure in a frequency adjustment mode.

FIG. 7A is an explanatory diagram showing a specific example of measurement data. FIG. 7B is an explanatory diagram showing a specific example of the value of the frequency adjustment factor obtained from the data of FIG. 7A. FIG. 7C is an explanatory diagram showing a specific example of a correction value corresponding to the value of the frequency adjustment factor in FIG. 7B. FIG. 7D is an explanatory diagram showing a specific example of a prescription example obtained from the values in FIGS. 7A and 7C.

[Explanation of symbols]

1: subjective optometry device 2: lens meter 3: objective optometry device 4: visual acuity table device 5-8: communication cable 10: measurement unit 11: measurement window 12: interface circuit 13: main control circuit 14: motor drive circuit 15: Drive mechanism 20: Operation unit 21: Display unit 25: Memory unit 26: Input unit 27: Main control circuit 28: Interface circuit.

Claims (5)

[Claims] 1. A subjective optometry apparatus that performs an optometry in accordance with a predetermined examination procedure, wherein the optometry is performed by performing the predetermined examination procedure in a stepwise manner, and a complete correction power of the eye of the subject is obtained. The optometry performing means to determine, the power adjustment factor used in the calculation of the prescription example of the optometry lens is determined based on the data acquired during the execution of the optometry, using the power adjustment factor and the perfect correction power, 1. A subjective optometry apparatus, comprising: a prescription example calculating means for calculating a prescription example of an optometry lens. 2. The subjective optometric apparatus according to claim 1, further comprising: an interview data acquisition unit for acquiring interview data obtained by an interview among data acquired during execution of the optometry, wherein the frequency adjustment factor is A subjective optometry apparatus determined based on the inquiry data. 3. A subjective optometric apparatus according to claim 2, wherein: a lens meter for measuring the power of old glasses of the subject; and an objective optometric apparatus for performing objective measurement of the naked eye power of the subject. Measurement data acquisition for acquiring measurement data obtained by measuring at least one of the lens meter and the objective optometry apparatus, among data used for calculating the power adjustment factor, which is connected to at least one of A prescription example calculating unit, wherein the prescription example calculating unit calculates a prescription example of the optometry lens using the inquiry data, the completely corrected power, and the measurement data, and is a subjective optometry apparatus. . 4. The subjective optometric apparatus according to claim 3, further comprising display means for displaying a frequency of the prescription example calculated by the prescription example calculating means. 5. The subjective optometry apparatus according to claim 3, wherein a lens loading mechanism for loading an auxiliary lens into a measurement window, a lens loading mechanism control means for controlling a lens loading operation of the lens loading mechanism, and the optometry performed. The complete correction power determined by the means, the power corresponding to the prescription example calculated by the prescription example calculation unit, the power of the old glasses of the subject measured by the lens meter, and the objective optometer Selecting means for selecting any one of the measured objective measurement powers of the subject, wherein the lens loading mechanism control means sets the lens having the power selected by the selection means to A subjective optometry apparatus, wherein the optometry apparatus is mounted on a measurement window, and wherein the display unit displays a frequency selected by the selection unit.