JP3946277B2 - Optometry equipment - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to an optometry apparatus that examines the visual function of an eye to be examined.
[0002]
[Prior art]
In an examination for prescribing a spectacle lens or a contact lens, an optometry apparatus including a subjective refracting power measuring apparatus that switches and arranges a correction optical system to an examination window is used. The eye to be examined is made to observe the inspection target via the optical system of the subjective refractive power measurement device, and the refractive power is examined by adjusting the optical system based on the response of the subject.
Initializing the optical system based on the objective value data by the objective eye refractive power measurement device and the eyeglass data by the lens meter when starting the inspection by the subjective refractive power measurement device This method is widely used at present.
By the way, when the optical system is initially set based on the objective value data, an objective correction value confirmation test may be performed in order to check the reliability of the other objective value data. In this examination, a visual target with a visual acuity value of 1.0 was presented and it was confirmed whether it could be read. If it can be read, the reliability of the objective value data is high, and it is determined that there is no visual function abnormality such as amblyopia in the eye to be examined, and the next examination is performed. When it was not readable, the target to be presented was lowered to a visual acuity value of 0.9 → 0.8 → 0.7.
[0003]
[Problems to be solved by the invention]
However, if the objective correction value confirmation test is started from the presentation of the visual target having an eyesight value of 1.0,
Since there are many subjects whose corrected visual acuity cannot be secured by 1.0 or more with one eye, it is often necessary to lower the visual acuity value of the visual target. In this case, there is a problem that the inspection time becomes long.
A visual target having a visual acuity value of 1.0 is often used in subsequent correction visual acuity tests and the like, and if the visual target of 1.0 is used at this stage, the subject may remember the visual target. In particular,
In the case of a visual acuity table having a visual target sequence having different visual acuity values and specifying a visual target to be read by a subject using a mask, it is easy to memorize when the visual target of the same visual target sequence is presented to each of the left and right eyes.
In view of the above problems, an object of the present invention is to provide an optometry apparatus that shortens the examination time and prevents an examination error caused by storage.
[0004]
[Means for Solving the Problems]
In order to solve the above problems, the present invention is characterized by having the following configuration.
(1) A subjective refractive power measurement device that arranges an optical system with the desired characteristics by driving a correction optical system in an examination window, and a view that switches and presents a target divided into a number of target sets to an eye to be examined In an optometry apparatus comprising a sign presentation means and an input means for inputting measurement data of an eye to be examined measured by an objective refracting power measurement device, based on the measurement data input by the input means, A correction optical system control means for determining the initial set value of the subjective refractive power measurement device and driving the correction optical system , and a target control means for presenting a predetermined target to the subject in accordance with the execution of the optometry program of the device. In addition , confirmation of reliability of measurement data and confirmation of visual function abnormality as an initial presentation target of the target presentation means for performing objective correction value confirmation inspection prior to the start of subjective examination by execution of the optometry program Minimum eyesight required A visual target control means for presenting a visual acuity table of a visual target set including a visual acuity value of 0.5 as a value and comprising a plurality of visual acuity values smaller than 1.0 to a subject based on a subjective examination start signal; It is characterized by having.
[0005]
(2) A subjective refracting power measurement device that arranges an optical system with the desired characteristics by driving the correction optical system in the examination window, and a view that switches and presents the target divided into a number of target sets to the eye to be examined In an optometry apparatus comprising a sign presentation means and an input means for inputting measurement data of an eye to be examined measured by an objective refracting power measurement device, based on the measurement data input by the input means, A correction optical system control means for determining the initial setting value of the subjective refractive power measurement device and driving the correction optical system , and a target control means for presenting a predetermined target to the subject according to the execution of the optometry program of the apparatus. In addition , confirmation of reliability of measurement data and confirmation of visual function abnormality as an initial presentation target of the target presentation means for performing objective correction value confirmation inspection prior to the start of subjective examination by execution of the optometry program Minimum eyesight required A visual target control means for presenting a visual acuity table of a visual target group including visual acuity values of 0.5 as values and comprising three visual acuity values smaller than 1.0 to a subject based on a subjective test start signal; A mask means for masking a part of the visual acuity table for selectively presenting the visual target in the visual acuity table, and changing the position of the vertical mask by the left and right eyes of the subject. And
[0009]
【Example】
Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is an external view showing an overall configuration of an optometry apparatus according to an embodiment.
Reference numeral 1 denotes an optometry table disposed between the subject and the examiner. Reference numeral 2 denotes a subjective refracting power measuring apparatus. The conscious refractive power measuring apparatus 2 switches and arranges various optical elements to the optometry window.
Reference numeral 3 denotes an objective eye refractive power measurement apparatus that projects a measurement index onto the fundus of the eye to be examined and detects a projection index image of the fundus with a light receiving unit to measure eye refractive power. This objective eye refractive power measuring device 3 is placed on a moving tray that can slide on the optometry table 1 and moves to the center position of the optometry table 1 during the objective test prior to the subjective optometry. To perform the measurement.
Reference numeral 4 denotes a projection-type target presentation device that presents an inspection target. Reference numeral 5 denotes a controller for operating the subjective refractive power measurement device 2 and the projection target presentation device 4, and 6 is a relay unit that relays communication between the devices.
[0010]
FIG. 2 is a view of the controller 5 as seen from above.
Reference numeral 30 denotes a display for displaying optometry information. The display 30 uses a dot matrix screen so that various kinds of information can be switched and displayed.
Reference numeral 31 denotes a switch unit. The switch unit 31 includes a menu switch 32 for switching the display screen of the display 30 to a menu screen, and two cursor movement switches 33 for moving the cursor displayed on the display screen. , An execution switch 34, an auxiliary lens switch group 35 for driving the optical system of the subjective refractive power inspection apparatus 2, a measurement mode changeover switch group 36, a measurement eye designation switch group 37, and switches and knob switches used for numerical input. It has an input switch group 38, a shift switch 39 used in combination with other switches, a target switch group 40 for driving the target presentation device 4, a start switch 41a for executing program optometry, a program feed switch 41b, and the like. The program execution switch group 41 and the information displayed at a predetermined position below the screen of the display 30 Function switches 42, switches 43 to mask is disposed on target.
[0011]
FIG. 3 is a block diagram for explaining the control of the apparatus.
A switch signal from the switch unit 31 of the controller 5 is input to the microcomputer circuit 50 after being subjected to predetermined processing. The microcomputer circuit 50 is connected to a memory 51 that stores a control program such as an optometry program and a memory 52 that stores objective value data and the like. The microcomputer circuit 50 converts the switch signal into various data based on the program stored in the memory 51, and controls the screen of the display 30 via the display circuit 53.
Further, the microcomputer circuit 50 sends a switch signal to the subjective refracting power test apparatus 2 and the visual target presentation apparatus 4 via the microcomputer circuit 55. The microcomputer circuit 60 drives a motor 62 via a drive circuit 61 to rotate a weak spherical disk 63, a strong spherical disk 64, an auxiliary lens disk 65, a cross cylinder disk 66, etc. Place the system in the inspection window. The microcomputer circuit 70 turns on the lamp 72 through the drive circuit 71 and drives the motor 74 through the drive circuit 73 to rotate the target disk 75 and the mask disk 76 on which the target is drawn. Then, a predetermined inspection target is projected onto a screen (not shown) placed in front of the eye to be examined.
[0012]
The objective circuit refractometer 3 and the lens meter 9 are connected to the microcomputer circuit 55, and the measurement data sent is stored in the memory 56. When a read command signal is input from the microcomputer circuit 50, the microcomputer circuit 55 reads the designated measurement data from the memory 56 and transfers it to the controller 5 side.
Reference numeral 57 denotes a printer that outputs measurement results, and reference numeral 58 denotes a drive circuit thereof.
[0013]
The operation of the apparatus configured as described above will be described. Here, based on the procedure (refer to the flowchart in FIG. 4) when the program optometry which this apparatus has is executed, an objective correction value confirmation test performed at the beginning of the subjective test will be mainly described.
When starting the examination, the examiner sets the optometry program as necessary.
The program is set by operating a switch while viewing the display 30. A menu item screen (not shown) displayed on the screen is operated by operating the cursor movement switch 33 and the execution switch to open a set screen (not shown). A selection setting item displayed on the set screen is selected with the switch 33 or the like, and the execution switch is pressed to complete the input.
[0014]
After performing an objective test and an inquiry using the objective eye refractometer 3, the optometry program is started by pressing the start switch 41a. The program optometry is started from the naked eye vision test, and thereafter, the advance switch 41b is pushed to advance the anterior eyeglass vision test (when the front glasses are held), the subjective test, and the prescription value determination.
When the objective eye refractive power measurement device 3 obtains the respective objective value data of SPH (spherical power), CYL (astigmatic power), and AXIS (astigmatic axis angle) of the left and right eyes, the objective eye refractive power is obtained. By pressing the print switch of the measuring device 3, these data are stored in the memory 56 of the relay unit 6. Thereafter, when the input switch and the objective value switch of the controller 5 are pressed, the data stored in the memory 56 is transferred to the objective value memory area of the memory 52 on the controller 5 side.
Further, the apparatus copies the objective value data to the subjective value memory area of the memory 52, and displays the objective value data on the display 30 via the display circuit 53 (not shown).
The objective value data may be input manually by operating the measurement mode changeover switch group 36 and the input switch group 38 in addition to data transfer by communication.
[0015]
The examiner starts the optometry program and conducts the naked eye vision test. The display screen of the display 30 is switched to the naked eye measurement mode, and the naked eye visual acuity value can be input. The optotype presenting apparatus 4 presents a test optotype having a predetermined visual acuity value, and the examiner obtains the naked eye visual acuity by changing the presenting target with the optotype mask switches of the optotype switch group 40 and the switch group 43. In this case, the subjective refractive power inspection apparatus 2 may be removed from the front of the subject's eye, or one eye of the inspection window of the subjective refractive power inspection apparatus 2 may be opened and the other eye may be shielded.
When the feed switch 41b is pressed after the completion of the naked eye vision test, a message for confirming the presence / absence of glasses and a switch operation instruction for the function switch group 42 depending on the presence / absence of glasses are displayed on the display screen. When a function switch with glasses is pressed in accordance with this instruction, the mode is switched to a spectacle measurement mode for performing a spectacle eyesight test (goes to a subjective test when there is no spectacles).
[0016]
When performing a spectacle vision test, the spectacle data is input. The eyeglass data is stored in the memory 56 by transferring data from the lens meter 9 in the same manner as the objective value data, and then stored in the eyeglass memory area of the memory 52 by pressing the input switch and the eyeglass switch ( In the same manner as the objective value data, the data may be transmitted manually or manually by operating the input switch group 38). The spectacle eyesight test is performed on a subject wearing spectacles in the same manner as the naked eye eyesight test (one eye of the inspection window of the subjective refractive power test apparatus 2 is a lens having the power of the front glasses, etc. You can also block your eyes).
[0017]
Then move on to the subjective examination. This device displays on the screen whether the initial value of the subjective refractive power measurement device 2 at the start of the subjective examination corresponds to the objective value data or the front spectacle value data. It can be selected in advance. Hereinafter, the case where the objective value data is selected will be described.
When the objective value data is selected, the process proceeds to an objective correction value confirmation test for confirming the suitability of the objective value data. The examiner places the subjective refractive power inspection device 2 in front of the subject's eyes, and performs an examination by specifying the examination eye.
The apparatus switches the display screen of the display 30 to the subjective measurement mode. FIG. 5 shows a display example at this time. The central display unit 80 displays data (objective value data) copied in the subjective value memory area, indicating that the bright and dark inverted display part can be changed. The left and right display unit 81 displays objective value data, and the lower display unit 82 displays a message such as a target type currently presented and an operation explanation.
[0018]
The apparatus arranges an optical system corresponding to the data (objective value data) copied to the subjective value memory area in the inspection window of the subjective refractive power inspection device 2 and also performs inspection on the visual target presentation device 4. Present the mark. The target to be presented is, for example, a target having a target set having a visual acuity value of 0.5 to 0.7 (see FIG. 6). The objective correction value confirmation test is performed to confirm the reliability of the objective value data of the left and right eyes and whether there is an abnormal visual function such as amblyopia in the eye to be examined. Present an optotype with visual acuity value. In this embodiment, the minimum visual acuity value is set to 0.5, but this is a visual acuity value from which the number inside the visual target can be read by the red green test in the subjective test, and even a visual target with an visual acuity value of 0.5. This is because, when it cannot be read, it means that re-measurement of the objective eye refractive power measurement device 3 or that the eye to be examined requires a close examination due to amblyopia or the like.
[0019]
Further, the apparatus puts a vertical mask on the visual acuity table of the visual target group having the visual acuity values of 0.5 to 0.7, and changes the position of the vertical mask depending on the right and left of the examination eye. When the right eye is designated, for example, the left column target is presented by masking as shown in FIG. 6A, and when the left eye is designated, the right column target is presented as shown in FIG. 6B. To do. Of course, the mask position can be changed by the mask switch of the switch group 43.
In this target presentation, the examiner asks the subject, for example, “Please read these targets in order from the top.” If the target with a visual acuity value of 0.5 can be read at the minimum, the reason is as described above. The objective value data is reliable, and the objective correction value confirmation test is completed assuming that there is no abnormality such as amblyopia.
[0020]
After completion of the one-eye objective correction check test, the examiner presses the feed switch to perform a red green test, an astigmatism axis detection test, an astigmatism power detection test, and a red green to prevent overcorrection. Perform a complete inspection and obtain a complete correction value. Similarly, an objective correction value confirmation test for other eyes is performed. As described above, in the objective correction value checking test, a mask is applied to a target different from that of the anterior eye.
The examiner performs a predetermined subjective test to determine the prescription value. When all inspections are completed, the print switch is pressed to output the inspection results.
[0021]
【The invention's effect】
As described above, according to the present invention, since the target of the lowest visual acuity value necessary for confirming the reliability of the objective measurement value and the visual function abnormality is first presented in the objective correction value confirmation test, the examination time Can be shortened.
In addition, since it is not necessary to present a visual target having a visual acuity value near 1.0, which is frequently used, it is possible to prevent memory of the visual target.
Furthermore, since the initial presentation target is changed according to the designation of the right eye and the left eye, the examiner can present a different target without operating the switch, preventing reading based on memory and checking accuracy. Can be improved.
[Brief description of the drawings]
FIG. 1 is an external view showing an overall configuration of an optometry apparatus according to an embodiment.
FIG. 2 is a view of the controller as viewed from above.
FIG. 3 is a block diagram for explaining control of the apparatus.
FIG. 4 is a flowchart illustrating a program optometry that the apparatus has.
FIG. 5 is a diagram showing an example of a display screen at the objective correction value confirmation test;
FIG. 6 is a diagram illustrating an example of a presented visual target at the objective correction value confirmation test;
[Explanation of symbols]
2 Self-aware refractive power measurement device 2
4 Projection-type target presentation device 4
3 Objective Eye Refractive Power Measuring Device 36 Measurement Mode Changeover Switch Group 50, 60, 70 Microcomputer Circuit

Claims (2)

A subjective refracting power measurement device that arranges an optical system with the desired characteristics by driving the correction optical system in the examination window, and a target presentation means for switching and presenting the target divided into a number of target sets to the eye to be examined And an input means for inputting measurement data of the subject's eye measured by the objective refractive power measurement device, and the subjective refraction at the time of subjective examination based on the measurement data input by the input means A correction optical system control means for determining an initial setting value of the force measuring device and driving the correction optical system; and a target control means for presenting a predetermined target to the subject in accordance with the execution of the optometry program of the apparatus, Prior to the start of subjective examination by the execution of the optometry program, it is necessary for confirmation of reliability of measurement data and confirmation of visual function abnormality as an initial presentation target of the target presentation means for performing objective correction value confirmation inspection. the minimum visual acuity Includes visual acuity value of 0.5, the optotypes optotype set of consisting of less than 1.0 plurality of visual acuity, with a, a target control means for presenting to the subject based on the subjective examination start signal An optometry apparatus characterized by that. A subjective refracting power measurement device that arranges an optical system with the desired characteristics by driving the correction optical system in the examination window, and a target presentation means for switching and presenting the target divided into a number of target sets to the eye to be examined And an input means for inputting measurement data of the subject's eye measured by the objective refractive power measurement device, and the subjective refraction at the time of subjective examination based on the measurement data input by the input means A correction optical system control means for determining an initial setting value of the force measuring device and driving the correction optical system; and a target control means for presenting a predetermined target to the subject according to the execution of the optometry program of the apparatus, Prior to the start of subjective examination by the execution of the optometry program, it is necessary for confirmation of reliability of measurement data and confirmation of visual function abnormality as an initial presentation target of the target presentation means for performing objective correction value confirmation inspection. the minimum visual acuity Includes visual acuity value of 0.5, the optotypes optotype sets of consisting acuity value of 1.0 is less than 3 stages, and target control means for presenting to the subject based on the subjective examination start signal, optotypes A mask means for masking a part of the eye chart to selectively present the target in the mask, and a mask means for changing the position of the vertical mask by the left and right eyes of the subject. Optometry device.

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