JPH05337083A - Subjective ophthalmoscope - Google Patents

Abstract

PURPOSE:To simplify the observation of a test eye and the recognition of an inspection by providing the first display means reporting the target of the target set presented to a subject and the second display means reporting the type of the optical elements arranged on inspection windows. CONSTITUTION:A subjective ophthalmoscope 1 is supported on a support arm 2 and held on an optometrical table 3 rotatably around the axis. The subjective ophthalmoscope 1 and a target presenting device 4 are connected with a wire. The right and left inspection windows 6a, 6b are provided on the subjective ophthalmoscope 1, multiple turret boards arranged with many lens groups are arranged, the turret boards are rotated by a motor, and optical elements such as lenses are selectively arranged on the inspection windows 6a, 6b. A subject observes the inspection targets through the optical elements arranged on the inspection windows 6a, 6b. The inspection side outer frame of the subjective ophthalmoscope 1 is provided with the portion displaying the target set presented by the target presenting device 4 and the portion displaying the type of the optical elements arranged on the inspection windows 6a, 6b and the inspection stage. The reduced diagram 7 of the target set is stuck and a light emitting element 8 is put on it to display the target set.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a subjective optometer for subjectively examining an eye to be examined by arranging optical elements having various characteristics in an inspection window which can be seen through.

[0002]

2. Description of the Related Art A plurality of terminals in which a large number of lens groups are arranged.
There is known an optometric optometer which has a ret board and which switches and arranges optical elements such as lenses in an inspection window by rotating the turret board. The subjective eye examination by this device is performed by showing the visual acuity chart to the subject through the examination window and switching the optical element arranged in the eye examination window after obtaining a response regarding the appearance. A device for electrically switching the optical element is also provided. As for the visual acuity display device necessary for the subjective optometry, a device that divides a large number of visual targets into a plurality of groups and switches and presents them is also known. This device electrically drives and presents the optotype sets by operating the operation panel placed in the hands of the examiner. Recently, there has also been proposed a device in which the operation panel of the subjective optometry device and the visual acuity display device are integrally formed so that these devices can be centrally controlled. Among these devices, there is also known a device provided with a monitor to inform the progress of the inspection.

[0003]

In the above-mentioned device, the examiner can actually check the visual acuity table or the operation panel or check the monitor in order to confirm the visual target presented on the visual acuity table presenting device. Had to do. However, in such a method, there is a problem that the examiner must frequently change the line-of-sight direction greatly, and the observation of the subject tends to be neglected. Especially, in the monitor method, the more information is given to the monitor side, the more thin the observation of the eye to be inspected,
Even if the eye to be inspected is displaced from the predetermined position of the optometer, there is a risk that the eye may proceed without being noticed. The present invention has been devised in view of the above drawbacks, and an object of the present invention is to provide a subjective ophthalmoscope that allows easy observation of the eye to be inspected and visual confirmation of the progress of the examination.

[0004]

The present invention has the following constitution in order to solve the above problems. (1) In the subjective optometer in which optical elements having various characteristics are switched and arranged in an examination window in front of the subject's eye, the examination of the subjective optometer for notifying the optotype of the optotype presented to the subject. It is characterized by having first display means provided on the outer frame on the person side and means for controlling the display of the display means based on a signal from the operation panel of the visual acuity display device.

(2) In the subjective optometer for switching and arranging optical elements having various characteristics in the examination window in front of the eye to be examined, the subjective optometer for informing the kind of the optical element arranged in the examination window. It is characterized by having a second display means provided on the examiner-side outer frame and means for controlling the display of the second display means based on a signal from the operation panel of the subjective optometer.

(3) In the subjective optometer for switching and arranging optical elements having various characteristics in the examination window in front of the subject's eye, the subjective optometer for notifying the optotype of the optotype presented to the subject. First display means provided on the outer frame on the examiner's side of the vessel,
Second display means provided on the examiner-side outer frame of the subjective optometer for notifying the type of the optical element arranged in the inspection window
A means for controlling the display of the first display means based on a signal from the operation panel of the visual acuity presentation device, and a means for controlling the display of the second display means based on a signal from the operation panel of the subjective optometer. Is characterized by.

(4) The subjective optometer of the above (1) or (3) is a supporting shaft that supports the optometer and is rotatable, and a rotative support shaft that rotates the subjective optometer. The angle holding means for holding the first display means at an angle visible from the examiner side even if the first display means is removed from the front of the eye.

[0008]

First Embodiment One embodiment of the present invention will be described with reference to the drawings. FIG. 1 is an overall view of an optometry apparatus including the subjective optometer of this embodiment, FIG. 2 is an external view of a controller for operating the optometry apparatus, and FIG. 3 is a subjective optometry apparatus viewed from the examiner side. It is an external view. Reference numeral 1 is a subjective optometer, and the subjective optometer 1 is supported by a support arm 2. The support arm 2 is extendable and retractable by a telescopic pipe, and is supported by an optometry table 3 so as to be rotatable around an axis. Reference numeral 4 is an optotype presenting apparatus capable of switching optotype sets. Reference numeral 5 denotes a controller for operating the subjective optometer 1 and the optotype presenting apparatus 4, which the examiner holds and handles. Various switches and rotary encoders are arranged in the controller. The controller 5, the subjective optometer 1, and the optotype presenting apparatus 4 are connected by a wire (not shown). The wireless operation (the optotype presenting device 4) makes the operation easier, but since it is described in Japanese Patent Application Laid-Open No. 63-132629 (named "visual acuity test device") by the applicant, the content thereof is incorporated. To do.

The left and right inspection windows 6a, 6 are provided on the subjective optometer 1.
b is provided. A plurality of turret plates in which a large number of lens groups are arranged are arranged in the subjective optometer 1, and the turret plates are electrically driven to rotate and optical elements such as lenses are switched and arranged in the inspection window. The subject sees the examination target through the optical elements arranged in the examination windows 6a and 6b. Further, the examiner-side outer frame of the subjective optometer 1 has a portion for displaying the optotype set presented by the optotype presenting apparatus and a portion for displaying the type of the optical element arranged in the examination window and the examination stage. It is provided.
In order to display the optotype sets, the reduced figure 7 of each optotype set is attached, and the light emitting elements 8 are individually arranged on the reduced figure 7, and the light emitting elements on the presented optotype set are turned on. Regarding the type of optical element and the display at the inspection stage, the spherical refractive power, the cylindrical surface refractive power and the axis angle, the prism diopter, etc. are displayed in characters at 9
Marks known to those skilled in the art are attached to auxiliary lenses and the like, and light emitting elements 11 are individually provided. Since the meanings of these marks are well known to those skilled in the art,
The description is omitted. Eight light emitting elements 12 indicating the axial direction of the lens of the cross cylinder test are provided at equal intervals on the outer periphery of the inspection windows 6a and 6b.

FIG. 4 shows the subjective eye optometer 1 when the support arm 2 is rotated to remove the subjective eye optometer from the front of the eye to be examined.
It is a figure explaining the mechanism which makes the display part of this visible from the examiner side. The support arm 2 is provided with a fixed shaft 13 which does not depend on the rotation of the support arm. A support arm 2 supporting the subjective optometer 1 is rotatably mounted on a horizontal arm 2a, and a belt (wire) 15 is attached to a fixed shaft 13 and a mounting shaft 14 of the subjective optometer 1. Support arm 2
4 is rotated to the position shown by the dotted line in FIG. 4B, the subjective optometer 1 is maintained at a predetermined angle with respect to the examiner. The angle of the subjective optometer 1 can be arbitrarily set by the ratio of the shaft diameter of the fixed shaft 13 and the shaft diameter of the mounting shaft 14.

FIG. 5 is a block diagram showing the control of the above apparatus. .. The signal from the controller 5 is sent to the central processing unit 20 by an electric signal (infrared signal or the like when the cordless operation is performed). When the signal from the controller 5 is a signal relating to an optical element, the central processing unit 20 processes the signal from the controller 5 and sends it to the subjective optometer 1. The control circuit 21 of the subjective optometer 1 processes the signals and drives the turret board or the like by the motor 23 via the motor drive circuit 22. Further, the control circuit 21 operates the display circuit 24 to control character display and blinking of the light emitting element. The display of the cross cylinder lens in the axial direction is performed by turning on the light emitting element at an angle relative to the astigmatic axis of the subject. When the signal from the controller 5 is a signal related to the optotype, the central processing unit 20 sends a signal to the control circuit 21 to operate the display circuit 24 to control blinking of the light emitting element. Further, the central processing unit 20 sends a signal to the control circuit 25 of the optotype presenting device, and the control circuit 25 drives the motor 27 via the motor drive circuit 26 to switch the optotype set.

[0012] Incidentally, Japanese Patent Application Laid-Open No. Sho 6 (1994) proposed by the present applicant.
As shown in JP-A-3-147429, when the optotype presenting apparatus is driven by a wireless signal, the central processing unit 20 outputs a return signal for confirming that the optotype presenting apparatus has received the signal. It is desirable to confirm whether it is operating normally such as sending it back to.

[0013]

[Embodiment 2] FIG. 6 is a view for explaining a second mechanism for allowing the examiner to visually recognize the display portion of the subjective optometer 1 even if the support arm 2 is rotated. Similar to the first embodiment, the supporting arm
In the arm 2, there is a fixed shaft 13 that does not depend on the rotation of the support arm.
Is provided, and the gear 30 is fixed to the fixed shaft 13. An encoder 31 (or potentiometer) is attached to the horizontal arm 2a supporting the subjective optometer 1.
The encoder 31 detects the rotation angle of the horizontal arm 2a.
The rotation angle signal of the encoder 31 is fetched by the control unit, and the rotation of the arm rotation motor 32 is controlled via the motor drive circuit to place the subjective optometer 1 at a predetermined angle.

The above embodiment shows the method of specifying the visual target set by the light emitting element, but the present invention is not limited to this, and it is also possible to switch and present it by a liquid crystal display or the like. It is included in the invention.

[0015]

According to the subjective optometer of the present invention, it is easy to observe the eye to be inspected and visually recognize the progress of the examination.

[Brief description of drawings]

FIG. 1 is an overall view of an optometry apparatus including a subjective optometer.

FIG. 2 is an external view of a controller for operating the optometry apparatus.

FIG. 3 is an external view of the subjective optometer as seen from the examiner side.

FIG. 4 is an explanatory view showing the manner of rotation of the support arm.

FIG. 5 is a block diagram showing control of the apparatus.

FIG. 6 is an explanatory view showing a second mechanism for rotating the support arm.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Subjective optometer 2 Support arm 3 Table for optometry 4 Target presentation device 5 Controllers 6a, 6b Inspection window 7 Reduced figure 8 Light emitting element

Claims (7)

[Claims] 1. A subjective optometer for switching and arranging optical elements having various characteristics in an examination window in front of an examinee's eye, the subjective optometer for informing an optotype of an optotype presented to a subject. The subjective ophthalmoscope comprising: a first display means provided on the examiner-side outer frame and a means for controlling the display of the display means based on a signal from the operation panel of the visual acuity display device. 2. The subjective optometer according to claim 1, wherein the display means is a plurality of sets of optotypes and a light emitting element provided for each set of optotypes. 3. A subjective optometer for switching and arranging optical elements having various characteristics in an examination window in front of an eye to be examined, wherein the examination of the subjective optometer indicates the kind of the optical element arranged in the examination window. An subjective optometry apparatus comprising: a second display means provided on the outer frame on the person side and means for controlling the display of the second display means based on a signal from the operation panel of the subjective optometer. 4. The type of optical element of claim 3 includes the axial direction of the cross cylinder lens, and the axial direction is a plurality of light emitting elements provided at equal intervals on the outer circumference of the inspection window. Self-conscious optometry device. 5. A subjective ophthalmoscope that switches and arranges optical elements having various characteristics in an inspection window in front of the eye to be inspected, which informs an optotype of an optotype presented to a subject. First display means provided on the examiner-side outer frame, and second display means provided on the examiner-side outer frame of the subjective optometer for notifying the type of the optical element arranged in the inspection window. A means for controlling the display of the first display means based on a signal from the operation panel of the visual acuity presentation device, and a means for controlling the display of the second display means based on a signal from the operation panel of the subjective optometer. A subjective optometer that is characterized. 6. The subjective optometer according to claim 1, wherein the subjective optometer is supported in front of the subject's eye by rotating the support shaft and the support shaft. Also the first
An subjective ophthalmoscope, comprising: an angle holding unit that holds the display unit at an angle that can be visually recognized by the examiner. 7. The subjective optometer according to claim 5, wherein the operating panel of the visual acuity display device and the operating panel of the subjective optometer are integrally formed.