JPH07194547A - Ophthalmic device - Google Patents

Abstract

PURPOSE:To allow the eves for examination to always face openings in an optometric portion when an examinee's face is held in position by making the portions of the examinee's face below and above the eyes abut to abutting members when the examinee's face is held in position with respect to a device, and allowing either the face or the device to move in the direction of an optical axis according to the unevenness of the examinee's face. CONSTITUTION:For an examinee's face to be held in position, the examinee peers into openings 1R, 1L in a casing 1 with both eyes and closes his or her face to the casing 1 until it touches a forehead rest 4 and abutting members 5R, 5L. The forehead rest 4 is pressed by the forehead of the examinee and the abutting members 5R, 5L are pressed by a portion near the zygomatic bone, and the forehead rest 4 and the abutting members 5R, 5L are simultaneously pressed into the casing 1 by and push back the face of the examinee because of the restoring force of a coil spring wound on a shaft member. Therefore, the forehead rest 4 and the abutting members 5R, 5L move in the direction of an optical path L1, that is, following the unevenness of the face, thereby holding the face of the examinee in position.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ophthalmologic apparatus used in an ophthalmic clinic or the like.

[0002]

2. Description of the Related Art In conventional optometers such as tonometers and autorefractometers, a fixed face pedestal and a slide pedestal on which a measuring section is mounted are provided on a base. The examiner fixes the subject's head with the forehead and chin rests of the face cradle, operates the operating rod to move the measuring unit on the slide table three-dimensionally, and aligns the device. There is.

[0003]

Although there are individual differences in the size of the face, in the conventional device the face cradle is fixed to the base, so that the face of the subject is fixed by the face cradle. In some cases, the opening of the measurement unit and the eye of the subject cannot face each other. In this state, it is difficult to detect the reflected light from the eye to be inspected and perform the alignment.

The object of the present invention is to solve the above-mentioned problems,
An object of the present invention is to provide an ophthalmologic apparatus in which the eye to be examined always faces the opening of the optometry part when the subject's face is fixed.

[0005]

SUMMARY OF THE INVENTION An ophthalmologic apparatus according to the present invention for achieving the above object comprises an abutting member that abuts on the upper and lower parts of an eye to be inspected, and one of the abutting members is the other member. On the other hand, it is characterized by having a movable portion that moves in the optical axis direction.

[0006]

The ophthalmologic apparatus having the above-described structure allows the contact between the lower part and the upper part of the eye of the subject by the contact member when fixing the face of the subject to the ophthalmic device. Either one moves in the optical axis direction according to the unevenness of the face.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail based on the illustrated embodiments. FIG. 1 is a configuration diagram of the first embodiment, and FIG. 2 is a front view from the subject side. Inside the housing 1, an optometry unit 3 that is three-dimensionally moved by a driving unit 2 is provided. Two openings 1L and 1R are provided on the front surface of the housing 1, a forehead support 4 is provided above these openings 1L and 1R, and abutting members 5L and 5R are provided below. .

FIG. 3 is a sectional view of the casing 1 including the forehead rest 4, and the forehead rest 4 is attached to the casing 1 through a shaft member 4a. A coil spring 7 is wound around the shaft member 4a, and expansion and contraction of the coil spring 7 is limited by a projection 8 and a box-shaped member 9 fixed to the housing 1, and the shaft member 4a is supported so as to be movable back and forth. Has been done. Further, the contact members 5L, 5
The R also has the same structure, and includes the forehead support 4 and the contact members 5L, 5
R can move back and forth when force is applied.

When the subject's face is fixed, the subject looks into the openings 1L, 1R of the housing 1 with both eyes and touches the forehead rest 4 and the contact members 5L, 5R. The face is brought close to the housing 1. The forehead rest 4 is pressed by the subject's forehead, and the contact members 5L, 5R are pressed by the vicinity of the cheekbones, and these members are pushed into the housing 1 by the subject's S face and, at the same time, the shaft member 4a. Due to the restoring force of the coil spring 7 wound around, the forehead rest 4 and the contact members 5L and 5R also push back the face of the subject. Therefore, the forehead rest 4 and the abutting members 5L, 5R move in the direction of the optical path L1, that is, in accordance with the unevenness of the face, and fix the face of the subject by the balance of action and reaction.

At the time of the inspection, the opening of the optometry unit 3 is manually adjusted so as to face the openings 1L and 1R of the housing 1. Then, since the eye E to be examined and the opening of the eye examination unit 3 face each other, the light flux from the anterior eye portion of the eye E is received by the photoelectric sensor inside the eye examination unit 3. A drive signal for the drive means 2 is created based on this received light signal, and the optical path L1 direction of the optometry unit 3 and the position of the optical path L1 in the vertical plane are automatically adjusted. Then, when the inspection of the eye E to be inspected is completed, the driving means 2
As a result, the optometry unit 3 is moved in the left-right direction and automatically faces the other eye.

In this apparatus, the abutting members 5L and 5R are also configured to be able to move back and forth similarly to the forehead rest 4, but the relative position in the optical path L1 direction near the eye E to be inspected and the cheekbone is different between individuals. Since there is not much, the contact members 5L, 5R may be fixed to the housing 1. In addition, the alignment of the optometry unit 3 is
It may be performed while observing the anterior segment of the eye E as in the conventional example.

FIG. 4 is a block diagram of the second embodiment, in which a three-dimensionally movable optometry section 11 is mounted on a base (not shown).
And a fixed face pad 12 is provided. A forehead rest 13 is provided above the face rest 12, one end of a spring 14 is attached to the center of the forehead rest 13, and eyeglass-shaped eye frames 15L and 15R are attached to the other end. Below the eye frames 15L, 15R
When L and 16R are attached and pressed, they are moved by the action of the spring 14 along the optical path L1 together with the eye frames 15L and 15R.

When fixing the face of the subject, the subject contacts his forehead with the forehead support 13 and looks into the eye frames 15L, 15R with both eyes. The lower eyepieces 16L and 16R are pressed by the lower eyelids of both eyes, and the action of the spring 14 causes the optometry section 11 to operate.
Since the lower part of the eye is pushed back in the same direction at the same time when it is pushed in the optical path direction of
Fixed in direction. Further, since the eye frames 15L and 15R are also pressed, the forehead support 13 and the eye frame 1 are adjusted according to the unevenness of the face.
The relative positions of the 5 L and 15 R eye examination units 11 in the optical path direction are adjusted.

When aligning the eye examination unit 11, an operation rod (not shown) is operated to open the opening on the side of the eye E to be examined by the eye frame 15.
The position of the optometry section 11 is automatically adjusted when facing L and 15R, as in the first embodiment.

FIG. 5 is a side view of a third embodiment applied to a non-contact tonometer for self-measurement, and FIG. 6 is a front view. A nozzle 22 is provided in the center of the front surface of the cylindrical casing 21, and a concave mirror 23 is provided around the nozzle 22. As shown in FIG. 5, screw-shaped contact members 24 and 25 are screwed onto the casing 21 above and below the concave mirror 23, and light sources 26 and 27 are attached to the left and right sides.

First, the user holds the housing 21 for alignment, and observes his / her eye E reflected on the concave mirror 23, so that the outer frame of the mirror 23 and the pupil are concentric. The contact members 24, 25 contact the periphery of the orbit of the eye E, and the cornea reflected light of the light sources 26, 27 is focused on the concave mirror 23.
Adjust the length of 5. If the lengths of the contact members 24 and 25 are accurately determined at the first time, the axial position is determined by hitting the face, so if the eccentricity is adjusted by looking at the concave mirror 23, the measurement can be performed immediately from the next time. it can.

If the position of the eye E to be inspected is correct with respect to the nozzle 22, compressed air is automatically blown from the nozzle 22 onto the cornea of the eye E, and the cornea is irradiated with the measuring light through the inside of the nozzle 22. Then, when the cornea is deformed into a predetermined shape by the compressed air, the cornea reflected light flux by the measurement light is received by the sensor inside the housing 21, and the pressure of the compressed air at this time is converted into the intraocular pressure.

[0018]

As described above, in the ophthalmologic apparatus according to the present invention, when the face of the subject is fixed to the apparatus, the general alignment can be performed, so that the examination can be simplified and the time can be shortened.
Further, since the subject's face is supported only by the upper and lower parts of the eyes, even if the subject moves his or her chin to make a voice, the subject's eye does not get out of the optical path of the device.

[Brief description of drawings]

FIG. 1 is a side view of a first embodiment.

FIG. 2 is a front view.

FIG. 3 is a cross-sectional view near the forehead support.

FIG. 4 is a front view of the second embodiment.

FIG. 5 is a front view of the third embodiment.

FIG. 6 is a sectional view.

[Explanation of symbols]

 3, 11 Optometry part 4, 13 Forehead support 5L, 5R Contact member 7 Coil spring 12 Face support 15L, 15R, 24, 25 Eye frame 16L, 16R Lower part support 22 Nozzle 23 Concave mirror 26, 27 Light source

Claims (1)

[Claims] 1. An ophthalmologic apparatus comprising: an abutting member that abuts against an upper part and a lower part of an eye to be inspected; and a movable part that moves one of the corresponding contact members in the optical axis direction with respect to the other member.