JP4003916B2 - Optometry equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an optometry apparatus suitable for subjectively examining the refractive power of an eye to be examined.
[0002]
[Prior art]
In an examination to prescribe spectacle lenses, etc., a measurement unit that switches and arranges lenses with various optical characteristics to the optometry window is used, and the examination target is shown through the lens placed in the optometry window to refract the eye to be examined. The power is examined subjectively. In this subjective optometry, optometry can be performed easily by associating and programming the examination procedure and the operation of the apparatus. Some optometry programs have standard procedures prepared by manufacturers in advance, but an apparatus that allows an examiner (user) to program and register an examination procedure has been proposed.
[0003]
[Problems to be solved by the invention]
However, in the conventional apparatus in which the examiner himself can program the examination procedure, the procedure is always fixed, and the examination cannot always be performed efficiently.
[0004]
In view of the above-described problems of the prior art, an object of the present invention is to provide an optometry apparatus that can perform an examination efficiently even in an optometry program set by a user.
[0005]
[Means for Solving the Problems]
In order to solve the above problems, the present invention is characterized by having the following configuration.
[0006]
(1) It has an input means for inputting an objective measurement value obtained by objectively measuring the refractive power, and the examination is performed by operating the optotype presenting apparatus and the subjective eye refractive power measurement unit according to a pre-programmed procedure. The optometry program may include two types of optometry programs, an existing standard optometry program and a specific optometry program created by the examiner. In an optometry apparatus that subjectively examines the refractive power of an optometry, a control program for an examiner to create a unique optometry program, which displays a program writing screen on a display and / or presents an examination optotype and / or A control program that can select the optical characteristics to be optically applied to the eye to be examined using the operation keys and set the examination items in sequence, and a supplement to the creation of a specific optometry program. The optometry program created by the user can be applied to the cross-cylinder (XC) test in the optometry program. The astigmatism power of the input objective measurement value is approximately In the case of 0, the examiner created an auxiliary program and a cross-cylinder test in a specific optometry program to replace the cross-cylinder test or the cross-cylinder test omission program that omits the red cylinder test once and the cross-cylinder test. Select in advance whether to execute all inspection items according to the order of the inspection items of the cross cylinder test, or to execute the cross cylinder test omission program when the astigmatism power of the input objective measurement value is approximately 0 And the execution of the cross cylinder test omission program is selected. When the astigmatism power of the objective measurement value is approximately 0, selection means for omitting the operation of the cross cylinder test in the specific optometry program, or the red cylinder test once and the cross cylinder test program, It is characterized by having.
(2) In the optometry apparatus of (1), the cross-cylinder test omission program further adjusts the astigmatism power when the input objective measurement value is small, and when the astigmatism power is substantially zero. It has a process of omitting the subsequent cross cylinder test.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a diagram illustrating a configuration of an optometry apparatus according to the present embodiment.
[0015]
Reference numeral 10 denotes a measurement unit that subjectively measures the eye refractive power. The measurement unit 10 electrically switches and arranges various lenses on the two right and left optometry windows 11. Reference numeral 200 denotes an optotype presenting apparatus for presenting an inspection target on the examination window 201, 20 denotes an operation unit for operating the measurement unit 10 and the target presentation apparatus 200, and 3 denotes a projection of the fundus by projecting the measurement index onto the fundus of the eye to be examined. An objective eye refracting power measuring device 4 detects a refractive power by detecting an index image with a light receiving element, and 4 is a lens meter. The measurement unit 10, the optotype presenting apparatus 200, the objective eye refractive power measurement apparatus 3, and the lens meter 4 are connected to the operation unit 20 via the relay unit 50.
[0016]
FIG. 2 is a block diagram of a control system of the apparatus according to the embodiment. The operation unit 20 includes a display 22 for displaying optometry information, an input unit 23 having various operation keys as shown in FIG. The memory unit 24 includes an optometry program storage unit 24a in which an optometry program prepared by the manufacturer is stored, an optometry program for the test progress procedure created by the user, and a storage unit 24b in which measurement data is stored. And a storage unit 24c having a control program for displaying on the display 22 and creating an optometry program. The main control unit 21 converts the operation signal input from the input unit 23 into various data, controls the display on the display 21 in accordance with the control program of the memory unit 24, and sends a signal relating to refractive power to the measurement unit 10 for the target. Is sent to the optotype presenting apparatus 200.
[0017]
The measurement unit 10 includes a spherical lens disk, an auxiliary lens disk, a lens disk 12 such as a cross cylinder disk, a drive unit 13 including a motor for driving each lens disk, and a control unit 14 for constituting a correction optical system. The control unit 14 arranges various lenses in the optometry window 11 in accordance with a signal transmitted from the operation unit 20.
[0018]
The optotype presenting apparatus 200 has a concave mirror, a beam splitter, etc. inside, and is a space-saving type optically measuring distance of 5 m, and an optotype disc plate 202 on which the inspection target is drawn, A mask plate 203 for masking the presented target, a lamp 204 for illuminating the target of the target disc, a motor 205 for rotating the target disc plate 202, a motor 206 for rotating the mask plate 203, and a control unit 210 for controlling them. The control unit 210 selectively presents the visual target on the examination window 201 in accordance with a signal transmitted from the operation unit 20.
[0019]
The control unit 51 of the relay unit 50 stores the measurement data sent from the objective eye refractive power measurement device 3 and the lens meter 4 in the memory 22 and also designates the measurement data designated by the read command signal from the operation unit 20. Is transferred to the operation unit 20 side.
[0020]
FIG. 3 is a view of the operation unit 20 as viewed from above. The input unit 23 has the following operation keys. Reference numeral 32 denotes a setting switching key group, which has keys used when various settings are made by switching the display screen of the display 20 to the menu screen. 33 is a target key group for switching the target to be presented to the target presentation apparatus 200, 34 is a mask key group for applying a mask necessary for the presented target, 35 is a start key for executing the program optometry, and 36 is an inspection for the program optometry. A feed key that advances the step to the next, 37 is a mode key group that designates a mode for changing data, 38 is an input data designation key group that designates a mode for inputting data or a mode for measurement, and 39 is an objective Data input keys used when inputting data from the eye-type eye refractive power measuring device 3 and the lens meter 4, 40 is a print key, 41 is a measuring eye designation key group, and 42 is a change of a measured value or a numerical value input. The dial knob to use. 43a and 43b are cross cylinder keys for switching the cross cylinder. The above keys include those used as operation keys for program writing.
[0021]
Next, the operation of the optometry of this apparatus will be described. The optometry program storage unit 24a stores a program of the examination progress procedure prepared in advance by the manufacturer, so that the optometry can be advanced by using this program. When creating, do as follows. Here, it is assumed that a program up to an examination for obtaining a one-eye complete correction value (a weakness number that can obtain the highest visual acuity of the subject) is programmed.
[0022]
When the menu key 32a is pressed, a setting menu screen is displayed on the display 22, and an item for writing a program is selected by using the cursor movement keys 32b and 32c. The program writing mode is entered by the execution key 32d, and the screen of the display 22 is switched to the program writing screen. Refer to the flowchart in FIG. 4 for program writing.
[0023]
First, the first R / G (red / green) inspection items before the astigmatism inspection are set. The target is set by pressing the R / G target key 33a of the target key group 33, and the type of optical characteristic optically imparted to the eye to be examined is set. Here, SPH (spherical power adjustment) mode is set. By rotating the dial knob 42 to the left, a desired amount of fogging is set. For example, when the dial knob 42 is rotated two steps to the left, fog for S + 0.5D is set. When the feed key 36 is pressed, the above R / G inspection items are stored.
[0024]
Subsequently, an inspection for astigmatism axis adjustment using a cross cylinder lens (hereinafter referred to as an XC lens) is set. The target is set by pressing the point group target key 33b. When the point cloud target key 33b is pressed for the first time, an AXIS (astigmatic axis adjustment) mode and an XC test mode are set. Then, when the feed key 36 is pressed, the item of astigmatism axis adjustment inspection is stored.
[0025]
Next, an astigmatism power adjustment test is set. The target is set by pressing the point cloud target key 33b again. Since the AXIS mode is set first, this time, the CYL (astigmatism power) adjustment mode is automatically set by the operation signal of the point cloud target key 33b. At the same time, the XC test mode is set. When the feed key 36 is pressed, the item of astigmatism power adjustment inspection is stored.
[0026]
Next, a second R / G inspection is set to prevent overcorrection and obtain the highest visual acuity. As in the previous case, the target is set by pressing the R / G target key 33a, and the SPH mode is set. By rotating the dial knob 42 two steps to the left, fogging to add S + 0.5D is set. When the feed key 36 is pressed, the second R / G inspection item is stored.
[0027]
Next, items for eyesight inspection are set. By pressing a visual acuity target key 33c having a visual acuity value of 0.8 to 1.0, the visual target is set and the SPH mode is set. By pressing the mask key 34b once, a horizontal mask with a visual acuity value of 1.0 is set. By pushing the feed key 36, items of visual acuity test are stored. Finally, pressing the start key 35 completes the program writing. The optometry program created by the user is stored in the storage unit 24a.
[0028]
The examination when the optometry program created as described above is executed will be described.
[0029]
Prior to the subjective optometry by the measurement unit 10, when the subject wears spectacles, the lens power is measured by the lens meter 4. The measurement data obtained by the lens meter 4 is transferred to the memory 52 of the relay unit 50 by pressing the print switch, and the measurement data storage unit 24b is further pressed by pressing the input key 39 and the glasses key 38a of the operation unit 20. Is remembered. Further, the objective eye refractive power measurement device 3 performs objective measurement of the subject's naked eye power, and the measurement data is similarly transferred to the memory 52 of the relay unit 5 by pressing a print switch. By pressing the input key 39 and the objective key 38b, it is stored in the measurement data storage unit 24b. When the objective value data is input, the other objective value data is displayed on the screen of the display 20. Further, a signal of objective value data is sent to the measurement unit 10 side, and the correction optical system of the objective value data is set as an initial value in the optometry window 11 of the measurement unit 10. The correction optical system initially set in the optometry window 11 of the measurement unit 10 can also be set to lens power data by the lens meter 4.
[0030]
When the objective value data can be input, the measurement unit 10 moves to the subjective optometry. After the consciousness key 38c of the operation unit is pressed to enter the consciousness measurement mode, the right eye or the left eye is designated by the measurement eye designation key group 41 to prepare for one-eye measurement. When the start key 35 is pressed, an optometry program registered in advance by the user is executed.
[0031]
Here, in the control program storage unit 24c, the progression procedure of the astigmatism test by the XC test is changed according to the astigmatism power (the astigmatism power of the measurement data input from the objective eye refractive power measuring device 3 or the lens meter 4). The program of the XC test sequence flow 101 as shown in FIG. 5 is stored. Even when the program created by the user is executed, the main control unit 21 replaces the examination progress flow 100 including the XC test with the XC test sequence flow 101 when the program has an XC test.
[0032]
According to the signal of the start key 35, the inspection starts from the first R / G inspection as previously set. A signal relating to the visual target is sent from the main control unit 21 to the visual target presenting apparatus 200, and a red-green visual target is presented in the inspection window 201. In addition, a signal relating to refractive power is sent to the measurement unit 10, and the optometry window 11 on the measurement eye side is subjected to a cloud that adds S + 0.5D to the initial value. The measurement mode of the operation unit 20 is an SPY mode in which the spherical power can be changed according to the optometry program. The subject is made to see the red-green target through the correction optical system set in the optometry window 11. The examiner obtains the response of the examinee and adjusts the spherical power of the measurement unit 10 by operating the dial key 42 so that the characters of red and green become the same.
[0033]
The optometry program is shifted to the next examination item by pressing the feed key 36. When the feed key 36 is pressed after the end of the first R / G inspection, the XC mode of astigmatism inspection is entered. When the main control unit 21 determines that the XC mode has been entered, according to the XC test sequence flow 101 of FIG. 5, the astigmatism power of the input objective value data (when the initial value setting of the measurement unit 10 is set to the spectacle data, The examination progress procedure is changed according to the astigmatism power).
[0034]
(A) In the embodiment, when the power of astigmatism = 0, the power step is set to 0.25D, and when the power of astigmatism in the objective value data is almost 0 (including a case where it is smaller than 0.25D), an astigmatism axis adjustment test using an XC lens Then, the astigmatism power adjustment test and the second R / G test are omitted, and the visual acuity test is started. This is because when there is no astigmatism frequency in the objective value data, astigmatism is hardly confirmed even in the subjective examination. In addition, duplication of R / G inspection can be eliminated.
[0035]
(B) When the power of astigmatism ≧ 0.5D, the power of astigmatism in the objective value data is 0.50D or more (the power of astigmatism is negative reading, but in this specification, the negative display is omitted), the XC lens The process proceeds in the order of astigmatism axis adjustment inspection, astigmatism power adjustment inspection, and second R / G inspection. A point cloud target is presented on the target presentation device 200, and the measurement mode of the operation unit 20 is set to the AXIS mode. In the optometry window 11 of the measurement unit 10, the axis of the XC lens is arranged according to the astigmatic axis angle of the objective value data. The examiner operates the cross cylinder keys 43a and 43b to invert the XC lens by 90 degrees, and has the subject respond to the appearance of the target before and after the inversion. In the AXIS mode, the astigmatism axis moves by turning the dial knob 42 to the left or right. Therefore, the astigmatism axis is adjusted so that the visual target can be seen to the same degree before and after the inversion of the XC lens.
[0036]
After the astigmatism axis is determined, when the feed key 36 is pressed, the astigmatism power adjustment inspection is started. The measurement mode of the operation unit 20 is a CYL mode, and the axis of the XC lens of the measurement unit 10 is arranged according to the adjusted astigmatism axis. Similarly, the subject inverts the XC lens by 90 degrees, responds to the appearance before and after the inversion, and adjusts the astigmatism power so that it looks the same. In the CYL mode, the astigmatism power can be changed by turning the dial knob 42.
[0037]
When the feed key 36 is pressed, the second R / G inspection is started. As in the case of the first R / G examination, a red-green visual target is presented on the visual target presenting apparatus 200, and the measurement mode is set to the SPY mode. The spherical power of the measurement unit 10 is clouded with + 0.50D. Then, the spherical power is adjusted by operating the dial key 42 so that the characters of red and green become the same level.
[0038]
(C) When the power of astigmatism is 0.25D When the power of astigmatism in the objective value data is 0.25D, the ascension power adjustment test using the XC lens is performed first. This is because when the astigmatism value data is weak astigmatism, the adjustment of the astigmatism power often becomes 0 (there is almost no astigmatism), and when the astigmatism power = 0, the astigmatism axis degree adjustment test is unnecessary. .
[0039]
If the power of the astigmatism is adjusted to be greater than 0.25D, the astigmatism axis can be confirmed more easily than the case of the astigmatism axis adjustment → astigmatism power adjustment with 0.25D, and the axial accuracy is improved. Furthermore, it takes less time than the case of astigmatism axis adjustment → astigmatism power adjustment → astigmatism axis adjustment with 0.25D.
[0040]
In the same manner as described above, the degree of astigmatism is adjusted by confirming the appearance of the point cloud target before and after the inversion of the XC lens. As a result, if the degree of astigmatism = 0, the inspection of astigmatism axis adjustment is omitted, and the process proceeds to the second R / G inspection (this second R / G inspection may also be omitted). If the power of astigmatism is not 0, the process proceeds to an astigmatism axis adjustment test. Then, when the feed key 36 is pressed, the inspection procedure moves again to the inspection for astigmatism power adjustment. Here, the reason why the astigmatism power adjustment inspection is performed again is that the astigmatism power may change when the astigmatism axis largely changes in the previous step. Note that the residual astigmatism due to the amount of change in the astigmatism axis and the astigmatism power is taken into consideration, and if necessary, the second astigmatism power adjustment can be stopped. Thereafter, the spherical power is adjusted by the second R / G inspection.
[0041]
After the second R / G test is performed (after the first R / G test is performed when the astigmatism degree of the objective value is 0), the test is performed by pressing the feed key 36 and the test is performed by the user. Move on to the visual acuity test which is the inspection item. The visual target presenting apparatus 200 presents a visual target having a visual acuity value of 1.0 with a horizontal mask, and the measurement mode is set to the SPH mode. The examiner confirms the highest visual acuity that can be visually recognized by the examinee with the mask movement key 34a or 34b of the mask key group 34. When the mask movement key 34a or 34b is operated, the visual acuity value target to be masked of the target presentation device 200 is changed. When the maximum visual acuity is determined, the spherical power is adjusted by operating the dial key 42, and the complete correction value for one eye is determined as the spherical power that gives the highest visual acuity with the most positive.
[0042]
FIG. 6 is a diagram showing a modification example of the XC test sequence flow 101. 5, it is possible to replace the first R / G inspection set by the user with the XC test inspection progress flow 102 and the XC test sequence flow 103. The difference is whether the R / G inspection is included in the XC test sequence.
[0043]
Even in the optometry program set by the user as described above, the progress of the examination procedure in the XC mode is automatically determined according to the astigmatism degree of the objective value data, so that there is no mistake or bothering and efficiency. The inspection can be performed well. In other words, if the normal XC lens procedure is followed, measurement will not be possible if there is no astigmatism, or if the astigmatism is weak, the measured value will be obtained after the XC test takes time. Although it may not be fixed, these problems are solved by this apparatus. In addition, since it is not necessary to consider the procedure by looking at the astigmatism power, errors can be reduced.
[0044]
Even when the astigmatism power is 0.25D, it is possible to set the astigmatism axis adjustment and the astigmatism power adjustment in the same order as in the case of 0.50D or more. This is done as follows. After the setting menu screen is displayed on the display 22 by the menu key 32a, the parameter set menu is selected from the menu screen. FIG. 7 shows an example of the screen at this time. By moving the reverse cursor 110 displayed on the screen with the cursor movement keys 32b and 32c, the item "C = 0.25XC test" is selected, and the dial knob 42 is rotated so that the black dot cursor 111 in the right column is displayed. Match “A → C”.
[0045]
Further, the above XC test sequence flows 101 and 103 can be made to follow the procedure according to the optometry program set by the user without applying this program. This is done as follows. On the parameter set menu screen shown in FIG. 7, after the reverse cursor 110 is set to the item “automatic XC setting”, the dial knob 42 is rotated to change the black dot cursor 111 in the right column to “No”. As a result, the procedure proceeds according to the procedure according to the optometry program set by the user.
[0046]
【The invention's effect】
As described above, according to the present invention, an examination can be performed efficiently even with an optometry program set by an examiner (user). Moreover, since it can also carry out according to the optometry program set by the examiner, it can be set as an apparatus easy to use for the examiner who is used to optometry.
[Brief description of the drawings]
FIG. 1 is a diagram illustrating a configuration of an optometry apparatus according to an embodiment.
FIG. 2 is a control system block diagram of the apparatus according to the embodiment.
FIG. 3 is a view of an operation unit as viewed from above.
FIG. 4 is a flowchart illustrating an example of program writing.
FIG. 5 is a diagram showing an optometry flow set by a user and an optometry flow changed by the apparatus.
FIG. 6 is a diagram showing a modification example of the optometry flow changed by the apparatus.
FIG. 7 is a diagram illustrating a parameter setting change.
[Explanation of symbols]
3 Objective eye refractive power measurement device 4 Lens meter 10 Measurement unit 20 Operation unit 21 Main control unit 22 Display 23 Input unit 24 Memory unit 200 Visual target presentation device

Claims (2)

An optometry program that has an input means for inputting objective measurement values obtained by objectively measuring refractive power, and operates the target presentation device and the subjective eye refractive power measurement unit according to a pre-programmed procedure. The optometry program may have two types of optometry programs, an existing standard optometry program and a specific optometry program created by the examiner. The optometry program is selectively executed to refract the eye to be examined. In an optometry apparatus that subjectively examines power, a control program for an examiner to create a unique optometry program, displaying a program writing screen on a display, and presenting it on an examination target and / or eye to be examined Assists in creating a control program that can set the inspection items in sequence by selecting the optical characteristics to be optically provided with the operation keys and a specific optometry program A program, the optometry program created by the user, a program that can be applied to the cross cylinder (XC) test in specific optometry program, the astigmatic power of the input objective measurements of substantially 0 In the case of cross cylinder test or cross cylinder test created by the examiner for the cross cylinder test in the specific optometry program that replaces with the cross cylinder test omission program that omits the red cylinder test once and the cross cylinder test. Whether to execute all the inspection items according to the order of the inspection items of the test, or to execute the cross cylinder test omission program when the astigmatism power of the input objective measurement value is approximately 0, is selected in advance, When the execution of the cross cylinder test omission program is selected Provided with a selection means for omitting the operation of the cross-cylinder test in the optometry program unique to the astigmatism power of the objective measurement value or the program of the red-green test once and the cross-cylinder test. An optometry apparatus characterized by the above.   2. The optometry apparatus according to claim 1, wherein the cross cylinder test omission program further adjusts the astigmatism power when the inputted objective measurement value is small, and performs the subsequent cross when the astigmatism power is substantially zero. An optometry apparatus characterized by having a process of omitting a cylinder test.

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