JP2006149843A - Optometer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an optometer capable of immediately coping with the change of a once-found prescription value and efficiently examining eyes. <P>SOLUTION: The optometer is for measuring the degree of correction for correcting the ametropia by subjectively examining the refraction of an examined eye. The optometer comprises a complete correction value examining means for measuring the complete correction value for long distance of the examined eye, a recruitment value examining means for measuring the complete correction value of the recruitment degree for short distance of the examined eye, a storing means for storing the complete correction value for long distance and the complete correction value of the recruitment degree obtained by the measurement, an arithmetic operation processing part for finding a prescription value and prescription recruitment value from the complete correction value for long distance and the complete correction value of the recruitment degree stored in the storing means, and a changing means for changing at least one of the obtained complete correction value for long distance, complete correction value of the recruitment degree and prescription value. The arithmetic operation processing part, after computing the prescription recruitment value, computes the prescription recruitment value again according to the change by the changing means of at least one of the complete correction value for long distance, complete correction value of the recruitment degree and prescription value. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an optometry apparatus that subjectively measures the refractive power of an eye to be examined.

A plurality of rotating disks each having various optical elements (spherical lenses, cylindrical lenses, auxiliary lenses such as prisms and polarizing elements) are provided in a pair of left and right lens chamber units, and each rotating disk can be rotated to rotate freely. 2. Description of the Related Art An optometry apparatus is known in which an optical element is switched to an examination window and the refractive power of an eye to be examined is measured subjectively. In this type of optometry apparatus, after obtaining the complete correction value and the prescription value in the distance test, the near-field test is further performed as necessary to obtain the complete correction value of the addition power. Thereafter, a predetermined calculation process is performed based on the complete correction value, prescription value obtained in the distance inspection, the complete correction value of the addition power obtained in the near inspection, and the prescription value of the addition power is obtained ( Patent Document 1).
JP-A-8-266467

An optometry apparatus that can automatically obtain a prescription value predicted from a complete correction value obtained in such a distance examination, a prescription value of the addition power, etc. is very convenient because the examination efficiency improves. . However, in recent years, in order to further improve the feeling of wearing, the prescription value once obtained is often slightly changed, and an optometry apparatus corresponding to this is required.
In view of the above-described problems of the prior art, the present invention provides an optometry apparatus that can respond immediately even if a prescription value that has been obtained once is changed, and that can perform examination (measurement) efficiently. And

In order to solve the above problems, the present invention is characterized by having the following configuration.
(1) In a optometry apparatus that measures the correction power for correcting a refractive error by subjectively examining the refractive power of the eye to be inspected, a complete correction value inspection means for measuring a complete correction value at a distance of the eye to be examined; Addition value inspection means for measuring the addition power complete correction value at the near distance of the eye to be examined; storage means for storing the distance complete correction value and addition power complete correction value obtained by the measurement; and the storage means An arithmetic processing unit for obtaining a prescription value and a prescription addition value from the complete correction value and addition complete correction value for distance, and the obtained complete correction value for addition, complete addition power correction value for the distance, Change means for changing at least one prescription value, and after the arithmetic processing unit obtains the prescription addition value, the distance complete correction value, addition power complete correction value by the change means, At least one prescription value The prescription addition value is recalculated in accordance with the change of the above.
(2) In the optometry apparatus according to (1), the arithmetic processing unit prescribes a trigger signal for changing at least one of the distance complete correction value, the addition power complete correction value, and the prescription value by the changing means. It also serves as a trigger signal for recalculating the addition power.
(3) The optometry apparatus according to (2) further includes recalculation setting means for setting whether or not the prescription addition value is automatically recalculated by the arithmetic processing unit.

  According to the present invention, even after a series of inspections are completed and a prescription value for addition power is obtained, any one of the complete correction value, the prescription value, and the complete correction value for addition power in the distance test Since the prescription value of the addition power is automatically changed in response to the change, the inspection can be performed efficiently.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a schematic external view of an optometry apparatus according to an embodiment, and FIG. 2 is a main part configuration diagram including a control system.
Reference numeral 1 denotes an optometry apparatus body that subjectively performs a refractive power test on a measurement eye, and includes a pair of left and right lens units 10. Each lens unit 10 is rotatably provided with a plurality of lens disks in which various optical elements are arranged on the same circumference. As the lens disks, a weak spherical lens disk 12, a strong spherical lens disk 13, a first auxiliary lens disk 14, a strong astigmatic lens disk 15, a weak astigmatic lens disk 16, and a second auxiliary lens disk 17 are prepared. As the auxiliary lens disk, a shielding plate, a red / green filter (R / G), a deflection lens (P135 °, P45 °), a dispersion prism (6 / 10Δ), a Madox lens, and the like are prepared. Each disk also has an opening that contains no optical element such as a lens. Each disk is driven to rotate by motors 12M to 17M, and a correction optical system intended for the inspection window 11 is switched and arranged. Reference numeral 18 denotes a microcomputer unit for performing drive control of the optometry apparatus main body 1.

  Reference numeral 8 denotes a rod attached to the upper portion of the lens unit 10 via an attachment member (not shown). A near target presentation unit 9 having a near chart 9a in which a plurality of near test targets are drawn is attached to the rod 8 so as to be movable in the longitudinal direction. The near visual target presenting unit 9 is suspended from the rod 8 so that the displayed near chart 9 a has the same height as the inspection window 11. Further, a scale is provided on the rod 8 so that the distance from the measuring eye located in the examination window 11 to the near chart 9a can be understood, and the near chart 9a is set to a desired distance from the eye to be examined during the near examination. It is possible to keep it in place. Note that the mounting member (not shown) has a configuration in which the mounted rod 8 can be folded upward, and the rod 8 is raised in the direction of the arrow in the drawing except during near-field inspection, thereby obstructing the inspection. I am trying not to become.

  Reference numeral 2 denotes an optotype presenting apparatus for presenting an inspection target. The lamp 20 is turned on to rotate and drive the target disk 21 and the mask disk 22 to a predetermined position so that a desired inspection target is placed in front of the eye to be examined. Projects onto a screen (not shown). Various test targets for inspecting visual functions such as subjective refractive power of the eye to be examined are formed on the target disc 21. Reference numeral 23 denotes a microcomputer unit for controlling the driving of the optotype presenting apparatus 2. In this embodiment, a projection-type target presentation device is used. However, the present invention is not limited to this. A space-saving type (a type using a concave mirror and a number of reflection mirrors) or a stationary type (a target from behind) is used. Conventionally used optotype presenting devices such as an illumination type) can be used.

  Reference numeral 3 denotes a controller for operating the optometry apparatus main body 1 and the optotype presenting apparatus 2, and various switch groups described later are arranged. The switch signal from the controller 3 is transmitted to the optometry apparatus main body 1 and the optotype presenting apparatus 2 via the relay unit 4, and the microcomputer units 18 and 23 control the operation of each disk based on the transmitted signals.

  Reference numeral 5 denotes an objective eye refractive power measuring apparatus that measures eye refractive power by projecting a measurement target on the fundus of the eye to be examined and detecting a projected target image of the fundus with a light receiving means. Is a lens meter for measuring optical characteristics of the spectacle lens in advance when the subject is using spectacles. Objective values and spectacle value data from the eye refractive power measurement device 5 and the lens meter 6 are stored in the memory 7 of the controller 3 via the relay unit 4.

  FIG. 3 is a view of the controller 3 as viewed from above. Reference numeral 31 denotes a liquid crystal display for displaying optometry information. Reference numeral 32 denotes a switch unit, which designates a mode for changing a target switch group 34, a mask switch group 35, a start switch 36 and a feed switch 37 for program optometry, and measurement data (S, C, A, addition power, etc.). A switch group 38, an input data designation switch group 39, a setting changeover switch group 40 for changing various parameter setting conditions, a measurement eye designation switch 41, a dial switch 42 used for changing measurement values and inputting numerical values, etc. Prepare. Further, reference numeral 30 shown in FIG. 2 denotes a microcomputer unit for performing drive control of the controller 3. The microcomputer unit 30 stores various inspection programs in advance.

  In the apparatus configured as described above, the optometry operation will be described based on the flowchart shown in FIG. The general procedure for optometry is as follows: Interview-Preliminary examination (Naked eye vision measurement, Correction vision measurement, Interpupillary distance measurement, Diopter detection, etc.)-Objective test-Subjective test-Temporary frame test The explanation will focus on the examination after the objective examination. In the present embodiment, the optometry is performed by executing an optometry program stored in advance in the microcomputer unit 30 of the controller 3.

First, the start switch 36 of the controller 3 shown in FIG. 3 is pushed to execute the program.
The objective test is performed in advance using the objective eye refractive power measuring device 5. Each measured value of the measured spherical power (S), astigmatism power (C), and astigmatic axis angle (A) of the left and right eyes is obtained by pressing the objective value switch of the input data designating switch group 39 shown in FIG. It is read from the objective eye refractive power measuring device 5 and stored in the memory 7. Each data stored in the memory 7 is sent by the microcomputer unit 30 to the microcomputer unit 18 of the optometry apparatus main body 1 via the relay unit 4. The microcomputer unit 18 appropriately rotates the lens disks 12 to 17 using a drive circuit and motors 12M to 17M, and arranges a shielding plate on one inspection window 11 (inspection window that is not a measurement eye) to perform measurement. An optical element of a refractive optical system corresponding to the objective value data is arranged in the inspection window 11 on the side to be operated. When the subject is using spectacles, the frequency data of the front spectacles may be acquired by the lens meter 6 shown in FIG. 2, and this may be used instead of the objective value data.

  In the subjective examination, first, complete correction of each eye at a distance is performed. This measurement is based on visual acuity check based on objective test data, red green test, astigmatism axis test, astigmatism power test, red green test again, and finally the visual acuity test to complete one-eye correction value. Is generally calculated. As described above, in the apparatus according to the present embodiment, each inspection item is programmed in the microcomputer unit 18. When the inspection is performed according to the optometry program, the start switch 36 is pressed to start the optometry program. Thereafter, by pushing the program feed switch 37, operation signals necessary for the inspection are issued to the optometry apparatus main body 1 and the optotype presenting apparatus 2 to sequentially perform the inspection. Further, the near vision target presenting unit 9 shown in FIG. 1 is placed at a position that does not interfere with the distance examination by folding the rod 8 upward.

  The examiner presses a switch in the visual target switch group 34 to cause the visual acuity presentation device 2 to present the visual target necessary for the examination. When a switch in the optotype switch group 34 is pressed, the microcomputer unit 30 transmits a command signal to the effect of presenting the optotype to the microcomputer unit 23. Based on the received command signal, the microcomputer unit 23 of the optotype presenting apparatus 2 turns on the lamp 20 and drives and controls the drive circuit and the motor to rotate the optotype disc 21 and the mask disc 22 for designation. The inspected visual target is projected onto a screen (not shown) placed in front of the eye to be examined.

  The spherical and astigmatic correction optical system arranged in the inspection window 11 can be switched by the switch group 38, the dial switch 42, and the like, and using this, a complete correction value determination inspection (spherical power, astigmatic axis angle, astigmatic power, etc.) )I do. Complete correction value determination tests are performed for both eyes. When the complete correction value determination inspection is completed, the examiner stores the measurement result (inspection result) in the memory 7 using the switch of the controller 3, and shifts to the binocular visual function inspection which is the next step. The examiner uses the target switch group 34, the mask switch group 35, the dial switch 42 and the like of the controller 3 to change the presented target or change the optical element arranged in the inspection window 11, and to obtain a complete correction value for one eye. Ask. When the one-eye perfect correction values for the left and right eyes can be obtained, the feed switch 37 is pressed to check the binocular balance to obtain the binocular perfect correction values.

  When the binocular perfect correction value is obtained, it proceeds to the correction power adjustment test for determining the prescription value. When the prescription value switch in the input data designation switch group 16 is pressed, the display screen of the display 31 is changed to the prescription value mode. The apparatus of the present embodiment has a correction power adjustment program for calculating an adjustment power (prescription value) that is expected to be optimal for the subject, and necessary operations are displayed on the display to notify the examiner. The microcomputer unit 30 includes, for example, a table that is applied to first wearers with myopia, a table that is applied to wearers such as glasses with myopia, and a table that is applied to first wearers with astigmatism. A plurality of tables such as a table and a table to be applied to a wearer such as glasses in astigmatism are stored. The examiner presses the shift switch and the prescription value switch shown in FIG. 3 to execute the correction power adjustment program. When the correction power adjustment program is executed, the microcomputer unit 30 calculates distance prescription values based on the obtained binocular perfect correction values and a plurality of stored table tables, and the results are shown in FIG. The data is displayed on the display 31 of the controller 3 in the display format as shown in FIG. In FIG. 5A, the prescription values (S, C, A) for the left and right eyes are displayed at the center, and the complete correction values obtained by the subjective examination are displayed small on both sides. . If there is no abnormality in the obtained prescription value, the feed switch 37 is pressed to determine the prescription value for distance. The determined prescription value for distance is stored in the memory 7.

  When the feed switch 37 is pressed, the microcomputer unit 30 causes the display 31 to display a confirmation message as to whether or not to perform the near-field inspection. When the near inspection is necessary, the examiner uses the switch of the controller 3 to input that the near inspection is to be performed.

  If it is determined that a near-field examination is necessary, the microcomputer 30 notifies the microcomputer unit 18 of the optometry apparatus body 1 via the relay unit 4. A lens corresponding to the binocular perfect correction power and a cross cylinder lens are set again in the lens unit 10 of the optometry apparatus main body 1, and the lens unit 10 converges to a distance of 35 cm in the vicinity. As shown in FIG. 1, the examiner keeps the rod 8 horizontal and positions the near-field target presenting unit 9 at a predetermined distance (35 cm in the present embodiment).

  On the display 31 of the controller 3, as shown in FIG. 5B, a distance complete correction value and a predetermined amount of addition power (1.25 in the present embodiment) are added to the center portion. The message indicating that the near-term addition measurement is to be performed is displayed. The controller becomes the ADD addition mode, and the spherical power can be increased or decreased by operating the dial switch 42. The examiner presents the near-field chart 9a of the near-field target presenting unit 9 shown in FIG. 1 as a cross-grid near-field target and performs addition measurement with both eyes to obtain a complete correction value of the addition power. When the complete correction value of the addition power is obtained, the feed switch 37 of the controller 3 shown in FIG. 3 is pressed to obtain the prescription value of the addition power.

  When the feed switch 37 is pressed, the microcomputer unit 30 stores the obtained correction value of the addition power in the memory 7 and executes a program for calculating the prescription value of the addition power, which is obtained by a distance test. A prescription value for the addition power is calculated based on the complete correction value, its prescription value, and the complete correction value obtained in the near-field inspection. As a method for calculating the addition power, for example, if the addition power is 0, the distance prescription value is determined as the prescription value of the subject as it is, and if the addition power is not 0, the binocular obtained in the distance test The difference between the spherical power adjusted by calculating the complete correction value and the prescription value and the astigmatism equivalent spherical difference are converted into the addition power, and a value obtained by subtracting this from the complete correction value of the addition power is set as the prescription value of the addition power. In this embodiment, the astigmatism equivalent spherical difference is calculated in units of 0.25, and the surplus is rounded down. The calculated prescription value of the addition power is displayed on the display 31 of the controller 3 as shown in FIG. Thereafter, the examiner confirms whether the visual acuity is less than 0.7 by using the near vision chart 9a having the visual acuity 0.7.

  Based on the prescription value determined as described above, the examiner confirms the wearing feeling through the temporary frame inspection and determines the final prescription value. At this time, when the prescription value obtained in the distance inspection is changed again because the feeling of wearing is not preferable due to difficulty in seeing in the temporary frame inspection, the prescription switch of the input data designation switch group 39 of the controller 3 is again set. Push. When the prescription switch of the input data designation switch group 39 is pressed, the microcomputer unit 30 changes the display on the display 31 of the controller 3 to the state where the prescription value is displayed at the center as shown in FIG. The prescription values (S, C, A) obtained in (1) can be changed. After selecting an item (S, C, A) to be changed using the switch group 38 of the controller 3, the examiner appropriately changes each item of the prescription value using the dial switch 42. When the dial switch 42 is used and a signal indicating that the prescription value is changed is sent to the microcomputer unit 30, the microcomputer unit 30 changes the prescription value to the microcomputer unit 18 of the optometry apparatus body 1 via the relay unit 4. Send a signal to the effect. The microcomputer unit 18 of the optometry apparatus main body 1 rearranges the optical elements in the examination window 11 based on the changed prescription value.

  On the other hand, the microcomputer unit 30 of the controller 3 displays the changed prescription value on the display 31 as shown in FIG. 5 (d), and completes the distance test using the prescription value change signal from the dial switch 42 as a trigger. Based on the correction value, the changed prescription value, and the complete correction value of the addition power, the prescription value of the addition power is recalculated, and the result is displayed. In addition, in FIG.5 (d), in response to having changed the prescription value in a distance test from R-2.25 to R-2.50, L-2.75 to -3.00, the addition power prescription In this example, the value is changed from +0.75 to +1.00.

Thus, even after the prescription value of the addition power is once determined, the prescription value obtained in the distance inspection is changed, and the prescription value of the addition power is automatically changed accordingly. Inspection can be performed efficiently without recalculation by the examiner. In the present embodiment, an example of changing the prescription value obtained in the distance inspection has been described. However, the present invention is not limited to this, and the complete correction value and the addition power obtained in the distance inspection are not limited. Similarly, when the correction value is changed, the prescription value for the addition power is automatically recalculated.
When it is not necessary to automatically recalculate the addition power as described above, a setting change screen is displayed on the display 31 using the menu switch of the setting changeover switch group 40 of the controller 3 shown in FIG. It is also possible to stop automatic recalculation by calling up and turning off the automatic power recalculation mode from on to off.

It is the external view which showed the structure of the optometry apparatus of this embodiment. It is a principal part block diagram which showed the control system of the optometry apparatus of this embodiment. It is the figure which showed the structure of the controller for operating the optometry apparatus in this embodiment. It is the flowchart which showed optometry operation. It is the figure which showed the format displayed on the display of a controller.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Optometry apparatus main body 2 Visual target presentation apparatus 3 Controller 9 Near-field visual target presentation unit 10 Lens unit 18 Microcomputer part 23 Microcomputer part 30 Microcomputer part 31 Display 32 Switch part

Claims (3)

In an optometry apparatus that subjectively examines the refractive power of a subject eye and measures the correction power for correcting a refractive error, a perfect correction value inspection means for measuring a perfect correction value at a distance of the subject eye, and a subject eye An added value inspecting means for measuring the added power complete correction value at a near distance, storage means for storing the distance complete correction value and the added power complete correction value obtained by the measurement, and stored in the storage means A calculation processing unit for obtaining a prescription value and a prescription addition value from the complete correction value and addition complete correction value for the distance, and the obtained complete correction value, addition complete correction value and prescription value for the distance Change means for changing at least one value, and after the arithmetic processing unit obtains the prescription addition value, the distance correction value, addition power complete correction value, prescription value of the distance by the change means Change at least one value Correspondingly, optometric apparatus characterized by recalculating the prescription subscription value. The optometry apparatus according to claim 1, wherein the arithmetic processing unit generates a trigger signal for changing at least one of the distance complete correction value, the addition power complete correction value, and the prescription value by the changing means, and a prescription addition power. An optometry apparatus that doubles as a trigger signal for recalculation. The optometry apparatus according to claim 2, further comprising recalculation setting means for setting whether or not to automatically recalculate the prescription addition value by the arithmetic processing unit.