JP3399613B2 - Optometry device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optometry apparatus, and more particularly, to an optometry apparatus which combines subjective measuring means and objective measuring means to carry out subjective and objective measurements.

[0002]

2. Description of the Related Art A built-in lens having various dioptric powers, which are selectively exposed to an optical path for a measurement, and a subjective measurement means for performing a subjective measurement, and a combination of the subjective measurement means, An optometry apparatus provided with an objective measuring means for performing objective measurement has been proposed (USP 379171).
No. 9).

In the case of this optometry apparatus, the subjective measurement by the subjective measuring means and the objective measurement by the objective measuring means can be performed with a relatively compact structure.

[0004]

However, in the case of the above-described optometry apparatus, it is not possible to simultaneously perform the subjective or objective measurement of either the left or right eye to be inspected. It is possible.

Also, in the case of this optometry apparatus, it is possible to measure the near vision state of either the left or right eye to be examined using the near vision target by the subjective measuring means, but this near vision state No measures have been taken to carry out the objective measurement for the measurement.

Therefore, it is an object of the present invention to provide an optometry apparatus capable of objectively measuring the near vision state of an eye to be inspected and simultaneously selecting either or both eyes simultaneously. Is.

[0007]

An optometry apparatus according to claim 1, wherein a subjective measuring means comprising a left-eye unit and a right-eye unit, which are individually configured, and an integral unit in each of the left-eye unit and the right-eye unit. A pair of objective type measuring means, and the objective type measuring means in which the objective type measuring means is integrally configured, the optical path of the left and right eye units is changed to a near vision target.
The optical path changing means to be brought together and the optical path changing means
Objective measurement is performed with the optical path focused on the target.
The above-mentioned control means is provided.

[0008]

An optometry apparatus according to a second aspect comprises an optical path changing means,
It is obtained by a structure in which gather light path by Ri near vision target to <br/> inserting a prism in the optical path in the subjective measurement means.

[0010]

[0011] optometric apparatus according to claim 3, but also between the own Satoshishiki measurement objective type measuring was measurable.

[0012]

The operation of the optometry apparatus having the above-mentioned structure will be described below.

In the optometry apparatus according to the first aspect, both the left and right units in which the objective measuring means are integrally constructed are provided.
Convergence converges the optical path to the near vision target. In this state, it performs other Satoshishiki measurement.

[0014]

In the optometry apparatus according to claim 2 , the optical path
The changing means inserts a prism in the optical path inside the subjective measuring means.
And, since it is intended to make gathering the optical path to the near vision target, without any way displace the subjective measuring means itself and thus far measurement, it is possible to smoothly switch the near measurement.

[0016]

The optometric apparatus according to claim 3, since the self Satoshishiki objective type measuring even during the measurement is measurable and make measurements while comparing the result of the reaction and objective-type measurement of subjective measurements be able to.

[0018]

EXAMPLES Examples of the present invention will be described in detail below.

The optometry apparatus 1 shown in FIG. 1 and FIG. 2 has a pair of left and right subjective measuring means 6 suspended above a measuring table 2 via a column 3, first and second arms 4, 5. ,
Objective measuring means 7 and objective measuring means 7 composed of a pair of left and right
The pair of support plates 8a and 8b attached to the end faces of the eyepieces 8a and 8b respectively supported by the pair of support plates 8a and 8b to face the respective optometry windows 9a and 9b of the subjective measuring means 6 and arranged in a 45-degree inclined arrangement. Mirror members (dich lock mirrors) 10a and 10b having the optical characteristics described above, an operation section 11 for inputting various operation signals arranged on the measurement table 2, various measurement information, an anterior face image of the eye E, etc. The input means 12 has a display section 12a composed of a liquid crystal display or the like, and a visual acuity chart device 13 for presenting the optotype C arranged at a position ahead of the measurement table 2 as required.

The conscious measuring means 6 includes a box-shaped left-eye unit 15a and a right-eye unit 15b, each of which has a left-eye rotation unit 1.
6a and the right-eye rotating unit 16b, the left-eye rotating unit 16a and the right-eye rotating unit 16b are connected to the slide driving unit 17, and the slide driving unit 17 is supported by the second arm 5. It is composed.

A near-distance optotype plate 50 having a near-distance optotype K is slidably attached to the slide drive unit 17.

In the objective measuring means 7, objective units 18a and 18b having the same structure are detachably attached to the left eye unit 15a and the right eye unit 15b, respectively, as shown in FIG. There is.

That is, a mounting mechanism for the objective unit 18a, for example, a guide rail 19 is provided in a horizontal arrangement on the end surface of the left eye unit 15a, and a long groove 20 provided on the back surface of the objective unit 18a is provided in the guide rail 19. By engaging and sliding this objective unit 18a, the objective unit 18a is incorporated in the left eye unit 15a and attached to the reference position, and the mirror member 10a of the objective unit 18a is left eye unit. It faces the measurement window 9a of 15a.

Further, when the objective unit 18a constituting the objective measuring means 7 is removed from the left eye unit 15a, as shown in FIG. It is possible to make a measurement of the formula.
In FIG. 4, reference numeral 55 denotes an operation handle portion which is attached to the objective type unit 18a when it is removed from the left eye unit 15a, and switches such as a measurement switch are prepared. The operation handle 55 is attached using the long groove 20 provided on the back surface of the objective unit 18a or 18b, or a separate attachment mechanism is prepared.

At this time, the visual target viewed by the subject may be the external visual target as it is, or a fixation target device having an internal cloud vision mechanism (not shown) may be prepared separately.

The cords for signal / control of the objective measuring means 7 are connected to the terminals of the objective measuring means 7, and together with the subjective measuring means 6, the columns 3, the first, and the first columns above the measuring table 2. It is connected to the control means 40 described later via the inside or the outside of the second arms 4 and 5.

The objective unit 18b which is attached to and detached from the right eye unit 15b has the same structure, and the mirror member 10b.
Faces the measurement window 9b of the right eye unit 15b.

The left eye unit 15a and the objective unit 18a, and the right eye unit 15b and the objective unit 1
It is also possible to configure 8b integrally.

Here, the internal structure of the subjective measuring means 6 and the objective measuring means 7 will be described with reference to FIG.

Left eye unit 15 of the subjective measuring means 6
As shown in FIG. 5, a is the first, second, third, fourth and fifth lens discs 21, 21 ', 22, 22', 2
3, the first lens disk 21 has the holes 21a and spherical lens groups mounted in a circular arrangement. The second lens disc 21 'is provided with holes 21'a and a strong spherical lens group arranged in a circular arrangement.

The third lens disk 22 has holes 22a and weak elliptic lens groups mounted in a circular arrangement. Also,
The fourth lens disk 22 'has holes 22'a and a strong spherical lens group mounted in a circular arrangement. Further, the holes 23'a and the auxiliary lens group are attached to the fifth lens disk 23 in a circular arrangement.

The first to fifth lens discs 21, 21 ',
The lenses 22, 22 ', and 23 are rotationally driven by the lens driving units 24 provided in the left eye unit 15a, so that the spherical lenses, the cylindrical lenses, and the auxiliary lenses are selectively exposed to the eye examination window 9a. Has become.

The right eye unit 15b has the same structure as the left eye unit 15a except that it has a symmetrical structure.

As shown in FIG. 5, the objective unit 18a has a cover glass 25 at the end on the mirror member 10a side, and has a target 2 for measurement therein.
6, a half mirror 27 that reflects infrared rays, a knife edge 28 for limiting the amount of light, a relay lens 29, a magnification correction lens 30, an imaging lens 31, and a CCD camera 32, and in the range of, for example, +3 to -3D by the photorefraction method. Then, the objective measurement of the eye E is performed.

In FIG. 5, reference numeral 25 denotes a cover glass, which is inclined with respect to the optical axis and transmits infrared light and does not transmit visible light. The mirror member 10a faces the measurement window 9a of the left eye unit 15a.

Therefore, only the reflected light of the measurement light from the eye E is returned inside the cover glass 25 of the objective unit 18a.

[0037] The other Satoshishiki units 18a, 18b is has a right and left eyes symmetrical structure, the right and left eyes common, left unit 15a, it is also possible to allow shared by the right eye unit 15b. Further, at the time of subjective measurement, the objective type units 18a and 18b are connected to the guide rail 19
It is also possible to move it with and remove it from the measurement optical axis.

As shown in FIG. 6, the mirrors 10a,
The inclination of 10b is changed, and the measurement optical axis of the objective measuring means 7 is adjusted with respect to each lens in the box-shaped left eye unit 15a and right eye unit 15b of the subjective measuring means 6 and the eye E. The measuring light of the objective measuring means 7 is made incident so as not to be parallel or coaxial but to be tilted so as to be incident.
Box-shaped left eye unit 15a, right eye unit 15b
It may be arranged so that the reflection by each lens therein does not return to the objective measuring means 7.

Alternatively, in the projection optical system of the objective measuring means 7, for example, a polarizing member is provided between the target 26 and the half mirror 27, and further in the observation optical system, for example, between the half mirror 27 and the knife edge 28. It is also possible to provide a polarizing member whose polarization axis intersects or is orthogonal to the polarizing member provided in the projection optical system. It is also possible to reduce the tilt amount and to combine both of them.

At this time, the lens shape shown in FIGS. 5 and 6 is a combination of convex and concave , but it is better to make it a biconcave or a biconvex combination.

[0041] 33, 34 is a reference distance correction lens, a structure arranged as needed. Further, the cover glass 25 described above may be a cover glass 25 'having another arrangement.

Next, the input means 12 will be described with reference to FIGS.

The operation section 11 of the input means 12 is provided with a large number of keys for instructing various operations of the subjective measuring means 6 and the objective measuring means 7. Furthermore, it is also possible to instruct the operation of the visual acuity chart device 13 that presents various visual targets of the visual target C.

That is, of the subjective measurement mode, the objective measurement mode, the subjective measurement mode, the distance mode, the near mode,
Keys for setting each binocular, left eye, right eye, etc. in the objective measurement mode such as binocular, left eye, right eye, etc., and other various keys required for measurement are provided. In addition, such an instruction can also be issued from the mouse 36.

The display section 12a of the input means 12 is adapted to display various modes. That is, as shown in FIG. 7, the values of the spherical power, the cylindrical power, and the axial angle by the objective measuring means 7 and the anterior ocular segment image of the eye E to be examined, as well as the right eye and the left when the subjective measuring means 6 are used. An eye target image, an icon I of the mouse 36, and the like are displayed.

Further, on the display section 12a of the input means 12,
As shown in FIG. 7, together with the anterior ocular segment image of the eye E, the spherical power, the cylindrical power, and the values of the left and right eyes of the axial angle by the objective measuring means 7, and the spherical power, the cylindrical power by the subjective measuring means 6. The values of the left and right eyes of the axial angle are displayed in a list, and the visual acuity value (1.2, 1.2, etc.) and the target image can also be displayed. In this case, the visual acuity value during actual measurement (for example, during 1.2) may be reversed or blinked as shown by the box in FIG.

Further, as shown in FIG. 9, the anterior ocular segment image of the eye E to be examined and the spherical power, cylindrical power, axial angle values of both eyes by the objective measuring means 7 and the spherical surface by the subjective measuring means 6. In some cases, the power, cylinder power, and left and right eye values of the axial angle are displayed in a list.

Furthermore, as shown in FIG. 10, an image of one side of the eye E to be inspected, the spherical power, the cylindrical power, the value of the axial angle by the objective measuring means 7, the spherical power by the subjective measuring means 6, and the cylindrical power. Display the degree and the value of the axis angle together with the visual acuity value,
Moreover, it is also possible to display an optotype image corresponding to the visual acuity value at the time of measurement by the consciousness-type measuring means 6 together and specify it by the icon I.

Next, referring to FIG. 11, the optometry apparatus 1
The control system of will be described.

This optometry apparatus 1 includes a control section 41 for controlling the whole and a program memory 4 storing an operation program.
2 is provided with a control means 40, and this control unit 41
Further, the left-eye driving unit 16a, the right-eye driving unit 16b, and the slide driving unit 17, which constitute the optical path changing unit, are connected, and the lens driving unit 24 of the subjective measuring unit 6 is connected. Further, the operation of the visual acuity chart device 13 that presents various visual targets of the visual target C is instructed.

Further, the control unit 41 is provided with C of the objective measuring means 7.
CD camera 32, based on the reflected light beam of infrared light to be projected onto the eye E to calculate the refractive power of the eye E, the spherical power, cylindrical power, and connecting the calculating unit 4 4 for obtaining the axial angle, etc. There is.

When the objective unit 18a constituting the above-mentioned objective measuring means 6 is removed from the left eye unit 15a, the control means 40, which will be described later, prepared for the measuring apparatus 1.
Needless to say, the same control means other than the control means 40, for example, a signal / control code of the control means constituted only by the objective measurement means and the objective measurement means It is also possible to make a measurement by connecting through 7 terminals. In this case, the display unit 12 for displaying the anterior segment image of the subject and the measurement result may be configured to be detachable from the objective measuring unit 7, and another detachable display device may be prepared. .

Next, the operation of the measuring apparatus 1 having the above-mentioned structure will be described.

The examiner uses the measurement window 9 of the subjective measuring means 6.
Left and right eyes E to be examined are placed in the vicinity of a and 9b, and the eye E is placed at a position, for example, 5 m from the subjective measurement means 6 in front of the table 2 via the subjective measurement means 6 and the mirror members 10a and 10b. The visual target C on the arranged visual acuity chart device 13 is visually recognized.

At this time, the objective measuring means 7 is attached to the subjective measuring means 6 and is arranged between the eye to be inspected and the visual target C. In this state, the optotype C is viewed and the operation section 11 performs measurement in the objective measurement mode.

When the measurement is performed in the objective measurement mode and the refractive power of the eye E is strong, the eye E and the objective measuring means 7 are used.
It is also possible to add a lens of the subjective measuring means 6 during the measurement. In this case, by adding the lens of the subjective measuring means 6 so as to be substantially conjugate with the far point of the eye E to be inspected, the eye E to be inspected E of the visual acuity chart device 13 arranged at the position of 5 m. Can be seen clearly. Also, the eye E
In order to remove the influence of the adjustment, the lens of the subjective measuring means 6 may be added so as to be slightly on the plus side of the far point of the eye E to be measured, and the cloudy vision may be performed. In this case, the measured value is a value that takes into account the amount added to make the image look cloudy.

After the measurement in the objective measurement mode, the operation unit 11 sets the subjective measurement mode and the distance mode. At this time, a lens is added to the subjective measurement means based on the measurement result in the objective measurement mode.
The value to be set may be either the measurement result as it is or a value in which a fixed value is considered for the measurement value.

Then, by the eye E to be examined, the visual target C in the visual acuity chart device 13 arranged in front of the table 2 via the subjective measuring means 6 and the mirror members 10a and 10b, for example, at a position 5 m from the subjective measuring means 6 is used. Make it visible and make a subjective measurement.

When performing the subjective measurement, the visual target C
While visually recognizing, the reaction of the subject is heard, and the lens of the subjective measuring unit 6 is operated by the operation unit 11 to replace the lens, thereby performing the measurement.

When it is desired to measure the near mode of the eye E from the stage of performing the subjective measurement of the distance mode or after the subjective measurement of the distance mode. The person arranges the near vision target K of the near vision target plate 50 provided above the subjective measurement means 6 in front of the mirror members 10a and 10b, and operates the operation unit 11 to set the near vision mode. . At this time, when the near vision target K of the near vision target plate 50 is arranged in front of the mirror members 10a and 10b, a separate detection mechanism may be provided to automatically set the near vision mode.

Along with this near mode setting, the left-eye rotating unit 16a and the right-eye rotating unit 16b, which constitute the optical path changing means, operate under the control of the control unit 41, and the left and right individually constructed subjective type. Left eye unit 15a and right eye unit 15 of the measuring means
b is the objective unit 18a, 1 of the objective measuring means 7
8b and the mirror members 10a and 10b are interlocked while interlocking, and the optical path for the eye E to be inspected that passes through the left eye unit 15a and the right eye unit 15b is used for near vision target plate 50 as shown in FIG. Gather on K.

As a result, the eye E to be examined visually recognizes the near vision target K, and the subjective refractive power measurement of the near vision refractive power of the eye E can be performed.

Then, the examiner operates the operation section 11 to set the objective measurement mode so that the eye E to be inspected is visually recognizing the near vision target K or the subjective near measurement mode. During the measurement of, the objective measurement can be performed by the objective units 18a and 18b.

That is, with the setting of the objective measurement mode,
The objective units 18a and 18b operate, the light flux of infrared light from the target 26 is projected on the eye E, and the light amount distribution of the eye E is detected from the output of the light receiving surface of the CCD cameras 18a and 18b. Then, the calculation unit 44 calculates the refractive power of the eye E by a known method based on the inclination.

Further, the calculation section 44 calculates the spherical power, the cylindrical power, the axial angle, etc. of the eye E to be examined. The measurement in the objective measurement mode is not limited to this method and may be another known method.

In this case, the examiner arbitrarily selects the binocular simultaneous measurement or the measurement of one eye by the operation unit 11, so that the spherical power, the cylindrical power, the axial angle, etc. of the eye E to be examined are determined by the left eye or the right eye. Only, it is possible to determine appropriately and promptly according to the state of the eye E to be inspected, that is, both eyes are at the same time.

The spherical power of the subject's eye E obtained by the calculation unit 44,
The values of the cylindrical power, the axis angle, and the like are displayed on the display unit 12a together with the image of both eyes of the eye E or the anterior segment of any one eye as shown in FIGS. It is displayed and used for visual inspection.

FIG. 13 shows another example of the optical path changing means.

This optical path changing means is applied to the left-right integrated subjective measuring means 60, and the rotary prism 6 is provided outside the lens plate groups 61a and 61b for the left and right eyes.
2a, 63a, 62b, 63b are arranged, the rotary prisms 62a, 63a are inserted and removed so as to face the measurement window 60a, and the rotary prisms 62b, 63b are attached to the measurement window 6a.
It is designed to be inserted and removed so as to face 0b.

According to this optical path changing means, the subjective measuring means 60 itself is not displaced and the rotary prisms 62a, 63a, 62b, 63b are simply inserted into the optical path to make the optical path the near vision target K. Can be terminated,
As a result, it is possible to quickly switch between distance and near vision.

Each rotary prism 62a, 63
Of course, it is also possible to incorporate a, 62b and 63b into the left eye unit 15a and the right eye unit 15b described above.

Further, as described above, the objective measuring means 7 may not be detachable, but the subjective measuring means 6 and the objective measuring means 7 may be integrally incorporated for the left and right eyes, respectively. .

With the objective measuring means 7 attached to the subjective measuring means 6, a shielding plate is placed between the mirrors 10a and 10b and the eye E to be inspected, for example, in the vicinity of the cover glass 25 '. Make the external visual target C visible with both eyes,
Whether or not there is movement of the eye to be inspected with or without the occlusion plate alternately or with the occlusion plate removed is determined by, for example, the movement of the pupil or the corneal reflection image by the illumination light of the objective measuring means 7. The positional relationship between a certain bright spot image and the pupil is observed by the observation system of the objective measuring means 7 to observe the presence / absence and degree of phoria or the amount of deviation of the objective units 18a, 18b.
The output can be measured by adding control and calculation of this output to the control unit 40 and the calculation unit 43, respectively. The observation at this time is performed by the illumination light of the near red light of the objective measuring means 7.

When the pupil or the positional relationship between the pupil and the luminescent spot image which is the corneal reflection image by the illumination light of the objective measuring means 7 and the pupil is stored in the binocular state, the position is blocked. The prism amount is calculated from the outputs of the objective units 18a and 18b in the same manner as described above so that the amount of deviation is detected and becomes the same as when viewed with both eyes, and the prism is inserted and the shielding plate is inserted. It can also be fixed.

The present invention is not limited to the above-mentioned embodiments, but various modifications can be made within the scope of the gist thereof.

According to the present invention described in detail above, since it has the above-mentioned structure, the following effects can be obtained. According to the first aspect of the invention, while the near vision state, allowing another Satoshishiki measurement.

[0077]

According to the second aspect of the present invention, it is possible to provide an optometry apparatus which can smoothly switch between distance measurement and near measurement without displacing the subjective measuring means itself. You can

[0079]

According to the third aspect of the present invention, it is possible to provide an optometry apparatus capable of performing the measurement while comparing the reaction of the subjective measurement and the result of the objective measurement.

[Brief description of drawings]

FIG. 1 is a perspective view showing an apparatus according to an embodiment of the present invention.

FIG. 2 is an enlarged perspective view of the subjective measuring means and the objective measuring means of the apparatus according to the embodiment of the present invention.

FIG. 3 is an enlarged perspective view showing how the objective unit is attached to the left eye unit of the apparatus according to the embodiment of the present invention.

FIG. 4 is an explanatory diagram showing a usage state of the objective unit alone.

FIG. 5 is an optical configuration diagram of the subjective measuring means and the objective measuring means of the apparatus according to the embodiment of the present invention.

FIG. 6 is an optical configuration diagram of another example of the subjective measuring unit and the objective measuring unit of the apparatus according to the present invention.

FIG. 7 is a perspective view showing a display mode of a display unit in the device of the embodiment of the present invention.

FIG. 8 is a perspective view showing a display mode of a display unit in the apparatus according to the embodiment of the present invention.

FIG. 9 is a perspective view showing a display mode of a display unit in the apparatus according to the embodiment of the present invention.

FIG. 10 is a perspective view showing a display mode of a display unit in the apparatus according to the embodiment of the present invention.

FIG. 11 is a block diagram showing a control system in the apparatus according to the embodiment of the present invention.

FIG. 12 is a plan view showing a converging state of the subjective measuring means in the apparatus of the embodiment of the present invention.

FIG. 13 is a sectional view showing another example of the optical path changing means.

[Explanation of symbols]

1 Optometry device 6 Self-conscious measuring means 7 Objective measuring means 10a, 10b Mirror member 12 Input means 16a Left eye drive 16b Right eye drive

Continuation of front page (56) Reference JP-A 64-17622 (JP, A) JP-A-3-80829 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) A61B 3 / 00-3/18

Claims (3)

(57) [Claims] 1. A subjective measuring means comprising a left-eye unit and a right-eye unit, which are individually configured, and a pair of objective-type measuring means, which are integrally configured in each of the left-eye unit and the right-eye unit, The optical path of the left and right eye units of the subjective measuring means in which the objective measuring means is integrally configured is changed to concentrate on the near vision target.
That the optical path changing means, like that was gathered light path in the near use optotype by the optical path changing means
An optometry apparatus, comprising: a control unit configured to perform objective measurement in a stationary state . 2. The optometry apparatus according to claim 1, wherein the optical path changing means focuses the optical path on a near vision target by inserting a prism into the optical path in the subjective measuring means. 3. The optometry apparatus according to claim 1, wherein the apparatus is capable of performing objective measurement even during subjective measurement.