JPH09182720A - Optometry device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable to accurately test visual functions of eyes such as phoria, convergence, etc. SOLUTION: This optometry device is equipped with a pair of right and left variable prisms which are rotated to test visual functions of eyes. An intermittent rotation mode select signal or a continuous rotation mode select signal is sent from an input section 71 of a part of a mode select device to a rotary drive device 40, which intermittently or continuously rotates the variable prisms according to the mode select signal. This enables to select the intermittent rotation mode or the continuous rotation mode for the variable prisms depending on the test type, therefore, values required for actual medical care can easily be obtained, and an optometry device which is able to accurately test visual functions of eyes such as convergence, etc., is realized.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optometry apparatus for examining binocular visual functions such as obliqueness, vergence and divergence of the eye.

[0002]

2. Description of the Related Art Conventionally, as this type of optometry apparatus, a pair of right and left variable prisms rotatably arranged and a rotation angle scale plate showing a rotation angle of these variable prisms are provided. It is known to manually rotate the prism, in which case the prism can be operated steplessly.

Further, as this type of optometry apparatus, there is known an optometry apparatus having a pair of left and right variable prisms rotatably arranged and a rotary drive device capable of intermittently electrically rotating the variable prisms. Has been.

[0004]

However, in the former optometry apparatus, since the prism operates steplessly, there arises a situation in which the measured value is between the scale of the rotation angle scale plate and the scale. In this case, the examiner arbitrarily selected the value indicated on the scale close to the measured value and regarded it as the value to be prescribed. For this reason, there is a problem that the optometry cannot be performed accurately.

Further, in the latter optometry device, since the value moves intermittently only at a prescriptable value, it is convenient at the time of prescription, but the measured value can be obtained only at a specific predetermined value, so that it is accurate. Cannot get measurements. In addition, since the variable prism is rotated intermittently, the image moves in the direction of fusion at the moment when the variable prism is stopped, so that there is a problem that the optometry cannot be performed accurately.

Therefore, the present invention has been made in view of the above circumstances, and an object of the present invention is to provide an optometry apparatus capable of accurately inspecting binocular vision functions such as phoria and vergence.

[0007]

In order to solve the above-mentioned problems, the present invention comprises a pair of left and right variable prisms that are rotatably arranged, and by rotating these variable prisms, a binocular vision function is achieved. In an optometry apparatus for inspecting, a rotation driving means capable of rotating the variable prism in any of an intermittent rotation mode of intermittently rotating the variable prism and a continuous rotation mode of continuously rotating the variable prism. And a mode selection unit which is connected to the rotation driving unit and which gives the rotation driving unit an intermittent rotation mode selection signal or a continuous rotation mode selection signal for selecting the intermittent rotation mode or the continuous rotation mode. .

With the above structure, the mode selection device gives the intermittent rotation mode selection signal or the continuous rotation mode selection signal to the rotation drive means, and the rotation drive means intermittently or continuously operates the variable prism in accordance with the mode selection signal. To rotate.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a schematic external view showing the external appearance of an optometry apparatus 1 according to an embodiment of the present invention.

The optometry apparatus 1 is provided with a pair of right and left variable prisms which will be described later and is rotatably arranged. By rotating these variable prisms, the binocular vision function can be inspected. As shown in the figure, the optometry unit 3 supported above the optometry table 2 via the support column 4 and the arm 5 is provided, and further connected to the optometry unit 3 by the connection cable 80, and it is possible to operate each part of the apparatus. The operation device 70 is provided. Further, the optotype display device 20 is arranged in front of the optometry table 2 at a distance of 5 m from the optometry device 1 to display the optotype on the optotype presenting unit 21 and to allow remote operation from the optometry device 1. Is provided.

The operation device 70 is an operation device capable of operating each part of the device including the optotype display device 20, and is arranged in a cuboid shape so as to be movable on the optometry table 2 and has a large number of keys on its upper surface. An input unit 71 capable of inputting operation commands to each unit of the apparatus and a display unit 72 such as a liquid crystal display for displaying various operations and optometry information are provided.

Further, the operating device 70 is connected to a rotary drive device 40 shown in FIG. 3 which will be described later, and the intermittent drive mode selection signal or the continuous rotation mode selection signal for selecting the intermittent rotation mode or the continuous rotation mode is supplied to the rotary drive device. It also has a function as a mode selection device given to 40. At this time, a dedicated switch for selecting each mode, such as “intermittent rotation mode”, “continuous rotation mode”, or the like, may be provided in the input unit 71.

The optometry unit 3 is composed of a right optometry section 3a and a left optometry section 3b which have the same shape on the front and back sides so as to be horizontally arranged, and is further provided with a pair of left and right optometry windows 5a and 5b. , And internally has an optical system including various lenses, filters, and the like.

FIG. 2 shows the internal optical system portion of the optometry unit 3, mainly showing the construction of the lens group. Since both the right optometry unit 3a and the left optometry unit 3b have a pair of left and right similar optical systems, only the right optometry unit 3a is shown in FIG.

Inside the optometry unit 3, a cylindrical lens disk 6, a spherical lens disk 7, an auxiliary lens disk 8 and a prism disk 14 are rotatably arranged.

On the cylindrical lens disk 6, a required number of cylindrical lenses 10 having different dioptric powers for astigmatism measurement are arranged in a circle, and when the cylindrical lens disk 6 rotates, each cylindrical lens 10 faces the optometry window 5a. Is attached to.

On the spherical lens disk 7, a required number of spherical lenses 11 having different dioptric powers for measuring dioptric power are arranged in a circle and face the optometry window 5a in the same state as the cylindrical lenses 10. Is attached to.

On the auxiliary lens disk 8, other auxiliary optical members 12 such as lenses for measurement and pinholes are arranged in a circle and face the optometry window 5a in the same state as the cylindrical lenses 10 and the like. Is attached to.

The prism disk 14 is composed of two sheets so that the binocular visual functions such as the obliqueness, vergence and divergence of the eye can be inspected, and the angle of the optical axis is continuously or intermittently rotated by itself. A variable prism 13 capable of giving a change is arranged and attached so as to face the optometry window 5a as necessary.

The variable prism 13 mounted on the prism disk 14 is adapted to rotate in the opposite direction by the same rotation angle. When the force is measured, the optical axis 50 is changed in angle from the normal focus position F to the inside position P as shown in FIG. 4, or as shown in FIG. When the vergence force is measured, the optical axis 50 can be changed in angle from the normal focus position F to the outside position Q thereof.

FIG. 3 is a block diagram showing the configuration of the control system of the optometry apparatus 1. In FIG. 3, control blocks that are not directly related to the present invention are omitted.

As shown in FIG. 3, the control system of the present apparatus is provided with a central control section 31 for controlling the entire apparatus, a storage section 32 for storing various optometry information in the central control section 31, and an operation to each section of the apparatus. An input unit 71 capable of inputting commands, a display unit 72 for displaying various operations and optometry information, a disk drive control unit 33, and a prism drive control unit 34 are connected to each other.

The disc drive control unit 33 connects the right disc motor unit 35 and the left disc motor unit 36 to control the drive of each disc such as the spherical lens disc 11 under the control of the central control unit 31. It is a thing.

The prism drive control section 34 connects the right prism motor section 37 and the left prism motor section 38, and drives and controls the variable prism 13 under the control of the central control section 31. Either of the intermittent rotation mode in which the variable prism 13 is intermittently rotated or the continuous rotation mode in which the variable prism 13 is continuously rotated by the prism drive control unit 34, the right prism motor unit 37, and the left prism motor unit 38. Even in this mode, the function as the rotation driving device 40 capable of rotating the variable prism 13 is realized.

Each motor section of the rotation drive device 40 is a motor such as a step motor, an electronic motor or an ultrasonic motor, and the rotational force of the rotation shaft of each motor is variable prism 13.
And a rotational force transmission device for transmitting to the. At this time,
For example, when the variable prism 13 is rotated in the intermittent rotation mode by the step motor, the step motor may rotate the rotating shaft every few pulses (for example, 4 to 6 pulses). Further, when the variable prism 13 is rotated in the continuous rotation mode by the step motor, the step motor may rotate the rotating shaft for each pulse.

Next, the operation of the optometry apparatus 1 will be described focusing on the operation relating to the variable prism 13.

First, the subject exposes the eye E to the eye examination windows 5a and 5b of the eye examination unit 3 in order to undergo the examination. The examiner changes the type of the optotype displayed on the optotype display device 20 or appropriately changes the optical system of the optometry unit 3 using the operation device 70 according to the examination content.

At this time, for example, when the inspection content is to use the variable prism 13, an operation signal is sent from the input unit 71 according to the operation content of the examiner, and the central control unit 3
Under the control of 1, the disk drive control unit 33 drives the disk motor units 35 and 36. When the disk motor units 35 and 36 are driven, the prism disk 14 rotates and the variable prism 13 moves so as to face the optometry windows 5a and 5b. Also, the examiner operates the input unit 71 so as to appropriately rotate and move the variable prism 13 in accordance with the inspection content. At this time, the examiner selects whether to rotate the variable prism 13 in the intermittent rotation mode or the continuous rotation mode.

When the examiner selects a mode, an intermittent rotation mode selection signal or a continuous rotation mode selection signal is transmitted from the input section 71 to the rotary drive device 40 via the central control section 31. In the rotation drive device 40, the prism drive control unit 33 causes the prism motor units 37 and 3 to operate in accordance with the mode selection signal.
8 is driven to rotate. The variable prism 13 is intermittently or continuously rotated by the prism motor units 37 and 38.

As a result, for example, in the case of measuring the divergence force at a distance, an angle change occurs so that the optical axis 50 moves from the normal focus position F to the inside position P thereof as shown in FIG. In addition, for example, when measuring the vergence force,
As shown in FIG. 5, the angle changes so that the optical axis 50 moves from the normal focus position F to the outside position Q thereof.

The variable prism 13 may be rotated intermittently or continuously, but the continuous rotation mode is suitable for obtaining accurate measured values. The intermittent rotation mode is suitable for the actual prescription.

As described above, according to the optometry apparatus 1 of the present embodiment, the rotating operation of the variable prism 13 can be selected to the intermittent or continuous rotation mode according to the contents of the examination, so that the actual prescription is performed. The power value can be easily obtained, and the binocular vision function such as congestion can be accurately inspected.

The present invention is not limited to the above embodiment, and various modifications can be made. For example, the present invention can be applied to various optometry devices using a rotatable variable prism, and is self-conscious. It can be preferably implemented regardless of whether it is an objective type.

[0035]

According to the present invention described in detail above, with the above-described configuration, the rotating operation of the variable prism can be selected to the intermittent or continuous rotating mode according to the inspection content, and the actual prescription The value that should be
It is possible to provide an optometry apparatus capable of accurately inspecting binocular vision functions such as convergence.

[Brief description of the drawings]

FIG. 1 is a schematic external view showing the external appearance of an optometry apparatus according to the present invention.

FIG. 2 is a diagram showing an internal optical system of an optometry unit according to the present invention.

FIG. 3 is a block diagram showing a configuration of a control system of the optometry apparatus according to the present invention.

FIG. 4 is a diagram for explaining the action of the variable prism when measuring the divergence force.

FIG. 5 is a diagram for explaining the action of the variable prism when measuring the vergence force.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Optometry apparatus 2 Optometry table 3 Optometry unit 13 Variable prism 31 Central control section 40 Rotation drive device 70 Operating device 71 Input section E Eye to be examined

Claims (1)

[Claims] 1. An optometry apparatus comprising a pair of right and left variable prisms rotatably arranged, and rotating the variable prisms to inspect the binocular vision function, wherein the variable prisms are intermittently rotated. Rotational drive means capable of rotating the variable prism in any of an intermittent rotation mode and a continuous rotation mode in which the variable prism is continuously rotated, and the intermittent rotation mode or the rotary drive means connected to the rotation drive means. An optometry apparatus, comprising: an intermittent rotation mode selection signal or a continuous rotation mode selection signal for selecting a continuous rotation mode;