JPH06197866A - Ophthalmoscope device - Google Patents

Abstract

PURPOSE:To provide an ophthalmoscope which can objectively confirm a characteristic of a prepared lens which is prescribed by a subjective ophthalmoscopy. CONSTITUTION:An ophthalmoscope device 1 comprises a subjective ophthalmoscopic means 6 for carrying out a subjective ophthalmoscopy, an objective ophthalmoscopic means 7 incorporated with the subjective ophthalmoscopic means 6, for carrying out an objective ophthalmoscopy, a mirror member having an optical characteristic such that visible light is transmitted therethrough, but infrared light is reflected thereon, a sight indicating device 13 which exhibits indices including a fixed index for the subjective ophthalmoscope 6, an input means 12 for setting a subjective ophthalmoscopic mode or an objective ophthalmoscopic mode, and for selecting ophthalmoscopic lenses having different sight degrees. The objective ophthalmoscope is carried out for an eye to be measured, through the intermediary of a subjective lens prescribed by the subjective ophthalmoscopy based upon the subjective ophthalmoscopic mode by the input means 12. With this arrangement, the objective ophthalmoscopic means 7 is effectively used so as to rapidly and objectively confirm an optical characteristic of a prescribed lens.

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 that combines subjective and objective optometry means to perform subjective and objective optometry of an eye to be examined.

[0002]

2. Description of the Related Art Subjective optometry means that incorporates optometry lenses of various powers and selectively exposes them to the optical path to the subject's eye to perform consciousness optometry; An optometry apparatus including an objective optometry means for performing an objective optometry is proposed.

In the case of this optometry apparatus, the subjective optometry by the subjective optometry means and the objective optometry by the objective optometry 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 perform the optometry of both the left and right eyes selectively only by performing the subjective or objective optometry. It is possible.

Also, in the case of this optometry apparatus, it is possible to effectively utilize both functions of the optometry type and the objective type optometry to check the characteristics of the prescription lens. Is not taken at all.

[0006] Therefore, an object of the present invention is to provide an optometry apparatus capable of promptly and objectively confirming the characteristics of a prescription lens prescribed by optometry for an eye to be examined.

[0007]

An optometry apparatus according to claim 1, wherein an optometry lens capable of selectively arranging optometry lenses of various powers for consciousness type optometry in an optometry window, and the consciousness optometry means. An objective optometry means for performing an objective optometry of the eye to be inspected by combining with the above, and a mirror member having optical characteristics of visible light transmission and infrared reflection connecting the optical paths of the subjective optometry means and the objective optometry means. A visual acuity device for presenting a target including a fixation target to the subjective optometry means, and an input means for setting the subjective optometry mode, the objective optometry mode, and selecting the optometry lens of the various degrees. It is possible to perform objective optometry by the objective optometry means for the eye to be inspected through the objective lens prescribed by the subjective optometry by the subjective optometry based on the subjective optometry mode by this input means. It was done.

According to another aspect of the present invention, there is provided an optometry apparatus capable of selectively arranging optometry lenses of various powers for consciousness-type optometry on an optometry window, and an optometry apparatus combined with the consciousness optometry means. Objective optometry means for performing objective optometry, a mirror member having optical characteristics of visible light transmission and infrared reflection connecting the optical paths of the subjective optometry means, the objective optometry means, and the consciousness optometry The visual acuity device for presenting an optotype including a fixation target to the means, and an input means for setting the subjective optometry mode, the objective optometry mode and selecting the optometry lens of each of the various degrees, and the input means The objective type optometry means automatically performs the objective type optometry whenever the objective lens is moved in the prescription process of the subjective optometry means based on the subjective optometry mode.

[0009]

The operation of the optometry apparatus according to claim 1 will be described below.

In this optometry device, the fixation index of the visual acuity chart device is presented to the subject's eye via the mirror member and the subjective optometry means, and in this state, the examiner selects the optometry lens of various powers by the input means. Set the subjective eye examination mode. As a result, the subjective eye examination of the subject's eye is performed, and the approximate values of the spherical power, cylindrical power, astigmatic axis, etc. of the subjective lens to be prescribed can be grasped.

Next, each time the lens of the subjective optometry means is moved in the prescription process in the above-mentioned subjective optometry mode, the objective optometry means performs the objective optometry on the subject's eye prescribed by the conscious optometry. .

Thus, the examiner can objectively confirm whether or not the prescribed spherical power, cylindrical power, astigmatic axis, etc. of the prescribed lens are truly proper.

According to the optometry apparatus of the second aspect,
Every time the lens of the subjective optometry means is moved in the prescription process in the above-described subjective optometry mode, the objective optometry is automatically performed by the objective optometry means at any time, so that the examiner is in the middle of the prescription process or after completion of the examination. It is possible to automatically screen whether or not the prescribed spherical power, cylindrical power, astigmatic axis, etc. of the prescribed lens are truly proper.

[0014]

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

The combined optometry apparatus 1 shown in FIG. 1 is a subjective type also shown in FIG. 2, which is a left and right integrated structure in which it is suspended above a optometry table 2 via a column 3, first and second arms 4, 5. 45 degrees which are supported by the optometry means 6, the objective optometry means 7, and the support plate 8 attached to the end face of the objective optometry means 7 and which are exposed to the optometry windows 9a, 9b on the left and right of the subjective optometry means 6. Mirror member (dichroque mirror) 10 having the optical characteristics of visible light transmission and infrared light reflection in the inclined arrangement, and an operation section 11 for inputting various operation signals arranged on the optometry table 2.
And an input unit 12 having a display unit 12a including a liquid crystal display for displaying various kinds of optometry information and an anterior face image of the subject's eye E, and 3m, 5m from the subjective optometry unit 6 at the end of the optometry table 2. And a visual acuity chart device 13 for presenting the distance C optotype C arranged at the position.

The subjective optometry means 6 includes a pair of left, right, first and second lens discs 2 in a box-shaped unit 15.
1, 22, and 23, spherical lens groups of 0.25D unit, for example, are mounted in a circular arrangement on each first lens disk 21. Further, elliptical lens groups are attached to each second lens disk 22 in a circular arrangement. Further, auxiliary lens groups of, for example, 0.25D units, such as spherical lenses, are mounted in a circular arrangement on each third lens disk 23. The pair of left, right, first, second, and third lens disks 21, 22, 23,
Each of them is individually driven by the lens driving unit 24.

As each auxiliary lens, for example, a continuously variable lens (Alvarez lens) 15 as shown in FIGS. 4 to 6 can be used. The continuous dioptric power variable lens 15 faces a pair of glass bodies 16 each having a curved surface with a predetermined curvature, and slides or rotates the pair of glass bodies 16 in a direction orthogonal to the optical path to obtain a minus power D. To a plus number D is continuously changed.

By using the continuous dioptric power variable lens 15, it is possible to deal with a wide range such as a fog on the eye E to be inspected having various refractive powers. In addition, it is also possible to adopt a structure made of transparent plastic, in which a liquid having a predetermined light transmittance is enclosed, and the curvature of the surface is changed by an external force.

As shown in FIG. 7, the objective optometry means 7 has a structure in which the left and right eyes are separated and symmetrically arranged, and a pair of cover glasses 25 is provided at the end of the mirror member 10 side. It is equipped with a pair of targets 2 inside
6, a dichroic mirror 27 that reflects a pair of infrared light and transmits a visible light, a knife edge 28 for blocking a part of a pair of light beams, a pair of relay lenses 29, a pair of focusing lenses 30, a pair of red. A dichroic mirror 33 that reflects external light and transmits visible light, a pair of imaging lenses 3
One pair of CCD cameras 32 are provided, and an objective eye examination of the left and right eyes to be inspected E is performed in the range of, for example, +3 to -3D by the photorefraction method.

Instead of the objective optometry means 7, it is also possible to use the objective optometry means 7A shown in FIG.

The objective optometry means 7A has an internal structure substantially similar to that of one side of the objective optometry means 7, and the cross mirror 6 arranged in a cross shape on the outside of the cover glass 25.
1. A pair of left and right reflecting mirrors 61a and 61b facing the cross mirror 61 are used to face the left and right eye examination windows 9a and 9b of the subjective eye examination means 6 and switch to the left or right.
The images are projected on the camera 32 at the same time.

In FIG. 8, reference numeral 35 denotes an auxiliary lens that uses a spherical lens or the like that is appropriately inserted and removed between the cover glass 25 and the half mirror 27. By using this auxiliary lens 35, an objective lens is used. The measurement range of the optometry means 7A can be expanded, for example, from -10D to + 10D to -20D to + 20D.

The visual acuity chart device 13 uses a subjective display visual acuity chart as shown in FIG. 1 or a projection visual acuity chart (not shown) so that it can be used as a visual fixation chart for other purposes. Has become.

In FIG. 9, one of the objective type optometry means 7, for example, the objective type unit 7-1 for the right eye is attachable / detachable to / from the subjective type optometry unit 6A which is also constituted by the left and right bodies. It shows a configuration.

That is, the groove 5 provided in the objective unit 7-1.
It is possible to combine the objective type unit 7-1 with the subjective type optometry unit 6A by engaging 1 with the rail 52 provided on the subjective type optometry unit 6A and sliding the objective type unit 7-1. The mirror member 10a hung from the objective unit 7-1 can be made to face the eye examination window 55 of the subjective eye examination unit 6A.

When the objective unit 7-1 is removed from the subjective eye examination unit 6A, as shown in FIG. 10, the objective unit 7-1 alone is used to perform the objective eye examination for the eye E. It becomes possible to do it. Incidentally, in FIG.
Is an operation handle attached to the objective unit 7-1.

Next, the input means 12 will be described with reference to FIGS. 11 to 14.

The operation section 11 of the input means 12 is provided with a large number of keys for instructing various operations of the subjective eye examination means 6 and the objective eye examination means 7.

That is, the subjective-type optometry mode, the objective-type optometry mode, the far-vision mode, the near-vision mode of the consciousness-type optometry mode,
Keys for setting each eye, left eye, and right eye in the objective optometry mode, and other various keys are provided.

Further, such an instruction can also be made 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. 11, when the subjective eye examination means 6 is used together with the spherical power, the astigmatic power, the value of the astigmatic axis and the visual acuity value by the objective eye examination means 7, as well as the front face image of the eye E to be examined. The target images for the right eye and the left eye (including the fixation target at the time of objective), the icon I of the mouse 36, etc. are displayed.

Further, on the display section 12a of the input means 11,
As shown in FIG. 12, together with the anterior face image of the eye E to be inspected, the spherical power, the astigmatic power, the values of the left and right eyes of the astigmatic axis, the spherical power, the astigmatic power by the subjective eye examining means 7, The values of the left and right eyes of the astigmatic axis are displayed in a list, and the visual acuity values (1.2, 1.5, etc.) and the target image may be displayed in some cases. In this case, the actual visual acuity value of 1.2 is shown in FIG.
It may be highlighted by enclosing it with a square.

Further, as shown in FIG. 13, together with the anterior face image of the eye E to be examined, the spherical power, the astigmatic power, the values of the left and right eyes of the astigmatic axis and the spherical surface by the subjective eye examining means 6 by the objective eye examining means 7. In some cases, the power, the astigmatic power, and the values of the left and right eyes of the astigmatic axis are displayed in a list.

Further, as shown in FIG. 14, the image of only one side of the eye E to be examined, the spherical power, the astigmatic power, the value of the astigmatic axis and the spherical power by the subjective optometric device 6, It is also possible to display the astigmatic power and the value of the astigmatic axis together with the visual acuity value, and also display the optotype image corresponding to the visual acuity value at the time of the optometry by the subjective optometry means 6 and specify it by the icon I. Is.

Incidentally, in order to eliminate the influence of the reflection of the measuring light of the objective type optometry means 7 by the subjective type optometry means 6, the objective type optics means is used with respect to the eye to be examined and the subjective optometry means 6 and the optical axis of the visual acuity chart. In order to tilt the optical axis of the optometry device 7, the mirror alone or the entire body may be tilted.

Next, the control system of the optometry apparatus 1 will be described with reference to FIG.

This optometry apparatus 1 is a CP for controlling the whole.
A control unit 40 including a control unit 41 including U and a program memory 42 storing an operation program is provided, and the two lens driving units 24 of the subjective eye examination unit 6 are connected to the control unit 41. There is.

In addition, the objective 41 of the objective optometry means 7 is added to the control unit 41.
A CCD camera 32, and a calculation unit 43 for calculating the refractive power of the eye E based on the reflected light flux of the infrared light with which the eye E to be inspected is calculated to obtain a visual acuity value, a spherical power, an astigmatic power, an astigmatic axis, and the like. Connected.

Further, the input means 12 is connected to the control unit 41, and the slide driving unit 70, the visual target switching unit 80 of the visual acuity chart device 13, and the printer 90 (not shown in FIG. 1) are connected. There is.

The CPU of the control unit 41 may be provided separately for each of the subjective optometry means 6 and the objective optometry means 7, or a single CPU may be used for both of them.

Next, the operation of the combined optometry apparatus 1 having the above-described structure will be described with reference to FIG.

The examiner uses the optometry window 9 of the subjective optometry means 6.
The eye E to be inspected is fixed in the vicinity of a and 9b, and the slide mechanism unit 7 is provided through the subjective eye examination unit 6 and the mirror member 10.
0, the visual target C of the visual acuity chart device 13 arranged at a predetermined position.
After that, the objective optometry mode is set by the operation unit 11 to start the measurement.

First, the objective optometry means 7 performs pre-measurement on the eye E to be examined (S1). At this time, if it is within the main measurement range of the objective optometry means 7 (S2), the control section 41
The main measurement is started under the control of (S4). On the other hand, if it is out of the measurement range, the lens driving unit 24 of the subjective optometry unit 6 operates under the control of the control unit 41, and the auxiliary lens (spherical lens, if necessary, a cylindrical lens or the continuous dioptric power variable lens 15 is used). It is inserted into the optical path (S3), and the process returns to step 1.

After the main measurement is completed, the objective optometry data obtained by the objective optometry of the eye E to be examined is obtained by the calculation unit 43 and sent to the control unit 41 (S5). As a result, under the control of the control unit 41, the objective optometry data is displayed on the display unit 12a in any of the modes shown in FIGS.

The objective measurement is performed for each of the left and right eyes or both eyes at the same time.

With the above, the first stage processing before the subjective eye examination is completed (S6).

Next, the examiner sets the subjective eye examination mode using the operation unit 11 and starts the subjective measurement (S7). At this time, the objective measurement result is automatically set in the subjective optometry means 6.

That is, the operation unit 1 which is operated according to the response of the subject.
The lens drive unit 24 operates based on the lens selection operation of No. 1 and it is determined whether the spherical lens or the cylindrical lens in the subjective optometry unit 6 has moved, for example, in 0.25D units (S).
8) If it moves, a pre-measurement is performed (S9). At this time, as in the case of the first step, if it is within the main measurable range by the objective optometry means 7 (S11), the control of the control unit 41 is performed. Then, the main measurement is automatically started (S12). On the other hand, if it is in the unmeasurable range, the subjective optometry means 6 is controlled under the control of the control unit 41.
Of the auxiliary lens (a spherical lens or the continuous dioptric power variable lens 15 is inserted into the optical path (S1
0), and returns to step 8.

The optical characteristics of the spherical lens or the cylindrical lens used for the subjective eye examination in this case are displayed on the display unit 12a together with the objective eye examination data under the control of the control unit 41 (S13). With such a subjective optometry, the optical characteristics such as the spherical power of the lens to be prescribed for the eye E can be objectively screened and automatically obtained at any time regardless of the response of the subject. After that, it is determined whether or not the processing is finished (S14), and the optometry is finished.

Alternatively, after obtaining the subjective eye examination data of the lens to be prescribed for the eye E to be examined, the eye E of the subject is made to wear the lens prescribed based on the subjective eye examination data and the examination is performed. The person again operates the operation unit 11 to set the objective eye examination mode. As a result, the objective optometry is performed by the objective optometry means 7 in a state where the final lens is worn, and the examiner determines whether the prescribed spherical power, cylindrical power, astigmatic axis, etc. of the lens are truly proper. You can objectively confirm whether or not.

Further, by comparing the subjective optometry data obtained by the response of the examinee with the objective optometry data obtained by the objective optometry means 7, the prescription of the lens by performing the red-gree test It can be easily determined whether or not the correction is performed.

The working distance between the objective optometry means 7 and the eye E to be examined in the optometry apparatus 1 is as follows.
1 is different from that of the objective type optometry means 6, but in the case of the objective type optometry means 7 by the photorefraction method, FIG.
7, the light amount distribution of the pupil of the eye E to be inspected is represented by an inclination amount α on the light receiving element of the CCD camera 32,
The difference is calculated by the calculation unit 43 to obtain the refractive power.

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

[0054]

According to the invention described in claim 1 which has been described in detail above, since it has the above-mentioned structure, the spherical diopter of this lens is obtained by performing the objective optometry on the eye to be inspected through the prescribed lens. It is possible to provide an optometry device capable of objectively confirming whether or not the cylindrical power, the astigmatic axis, etc. are truly proper.

According to the second aspect of the invention, it is possible to automatically and objectively ascertain whether or not the prescribed spherical power, cylindrical power, astigmatic axis, etc. of the lens are truly appropriate. Can be provided.

[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 side view of the subjective optometry means and the objective optometry means of the embodiment apparatus of the present invention.

FIG. 3 is an optical layout diagram of the subjective optometry means of the apparatus according to the embodiment of the present invention.

FIG. 4 is a cross-sectional view showing an example of an auxiliary lens used in the subjective eye examination unit of the embodiment apparatus of the present invention.

5 is an explanatory diagram showing a power change state of the auxiliary lens shown in FIG.

FIG. 6 is an explanatory diagram showing a power change state of the auxiliary lens shown in FIG.

FIG. 7 is an optical configuration diagram of an objective optometry unit according to an embodiment of the present invention.

FIG. 8 is an optical configuration diagram of another example of the objective optometry unit according to the embodiment of the present invention.

FIG. 9 is a perspective view showing a mounting state of the objective optometry unit and the subjective optometry unit which are separate right and left bodies.

10 is an explanatory diagram of a state in which an objective optometry is performed on the eye to be inspected by the objective optometry unit shown in FIG.

FIG. 11 is a perspective view showing a display mode of a display unit in the apparatus according to the embodiment of the present invention.

FIG. 12 is a perspective view showing a display mode of a display unit in the apparatus according to the embodiment of the present invention.

FIG. 13 is a perspective view showing a display mode of a display unit in the apparatus according to the embodiment of the present invention.

FIG. 14 is a perspective view showing a display mode of a display unit in the apparatus according to the embodiment of the present invention.

FIG. 15 is a block diagram showing a control system in an apparatus according to an embodiment of the present invention.

FIG. 16 is a flowchart showing the operation of the apparatus according to the embodiment of the present invention.

FIG. 17 is an explanatory diagram showing the relationship between the amount of light of the pupil of the eye to be inspected and the amount of inclination thereof.

FIG. 18 is an explanatory diagram showing the relationship between the amount of light of the pupil of the eye to be inspected and the amount of inclination thereof.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Optometry apparatus 6 Subjective optometry means 7 Objective optometry means 10 Mirror member 12 Input means

Claims (2)

[Claims] 1. An objective type optometry means capable of selectively disposing an optometry lens of various powers for performing an optometric type optometry on an optometry window, and an objective type optometry type eyepiece which is integrated with the consciousness type optometry means. An objective optometry means for performing, a mirror member having optical characteristics of visible light transmission and infrared reflection connecting the optical paths of the subjective optometry means, the objective optometry means, and a fixation target for the subjective optometry means A visual acuity device that presents an optotype including, and an input device for setting the subjective optometry mode, the objective optometry mode, and selecting the optometry lens of the various degrees, and the consciousness based on the subjective optometry mode by the input device. An optometry apparatus capable of performing an objective optometry by an objective optometry means on an eye to be inspected via an consciousness lens prescribed by the consciousness-type optometry means. 2. An objective optometry means capable of selectively disposing an optometry lens of various powers for performing an optometric optometry on an optometry window, and an objective optometry optometry combined with the subjective optometry means An objective optometry means for performing, a mirror member having optical characteristics of visible light transmission and infrared reflection connecting the optical paths of the subjective optometry means, the objective optometry means, and a fixation target for the subjective optometry means A visual acuity device that presents an optotype including, and an input device for setting the subjective optometry mode, the objective optometry mode, and selecting the optometry lens of the various degrees, and the consciousness based on the subjective optometry mode by the input device. An optometry apparatus for performing an objective optometry by an objective optometry means automatically whenever a subjective lens is moved in a prescription process in the subjective optometry means.