JPH08164112A - Ophthalmometer - Google Patents

Abstract

PURPOSE: To intermittently shield an inspecting optical path without performing a complicated operation in the test of strabismus. CONSTITUTION: A light shielding part and an opening part are formed on a lens supporting disk 14. The supporting disk 14 is rotated by a supporting disk rotation driving mechanism 15. A microcomputer 86, when recognizing a strabismus inspection mode, controls the supporting disk rotation driving mechanism so that the light shielding part and the opening part can be located at an inspecting optical axis C alternately repeatedly.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a subjective optometry apparatus for inspecting the refractive power of an eye to be inspected by arranging various optical members in an inspection optical path.

[0002]

2. Description of the Related Art For example, when performing a horizontal phoria test using a conventional subjective optometry apparatus, the following procedure is performed.

First, an auxiliary prism lens above the 6-prism diopter base is mounted on the optical axis of the right-eye examination optical system. Then, as shown in FIG. 11, the test subject is made to see the character optotypes in a vertical line. When there is no abnormality in the eye position of the subject, the subject uses the auxiliary prism lens and
As shown in (a), it seems that the character optotypes are arranged vertically in two. If there is an external strabismus,
As shown in (b), among the character optotypes that are separated into upper and lower parts,
The upper character target appears to be shifted to the right with respect to the lower character target. In this case, a prism outside the base is mounted on the optical axis of the left-eye inspection optical system, and the prism amount is increased until the left and right displacements of the upper and lower character optotypes are eliminated. When there is an inner oblique position, as shown in FIG. 12C, the upper and lower character optotypes are displaced to the left side of the lower character optotypes among the character optotypes that are vertically separated. looks like. In this case, a prism inside the base is mounted on the optical axis of the left-eye inspection optical system, and the prism amount is increased until there is no left-right deviation between the upper and lower character optotypes. In this way, when the prism amount is increased, the prism amount when the left and right displacements of the upper and lower character optotypes disappear is the correction amount of the oblique position. In the above description, “above the base” means a trapezoidal prism, and the long side of the two parallel sides faces upward. Further, the inner side of the base means that the long side of the trapezoidal prism faces the nose side of the subject, that is, the left side of the right eye, and the outer side of the base means the long side of the trapezoidal prism. Refers to the direction away from the subject's nose, that is, to the right with respect to the right eye. To change the prism amount to obtain the correction amount of phoria, use a rotary prism in which two prisms with the same prism amount overlap each other, and rotate the two prisms relatively around the optical axis of the inspection optical system. Has been realized.

By the way, in this inspection method, an auxiliary prism lens above the base of the 6-prism diopter separates one image into two, and the separated image is outside the fusion range of both eyes. And prevent the fusion of the senses. However, since the subject has a motility fusion effect and tries to arrange the two images so that there is no displacement on the left and right, one eye is intermittently shielded during the examination, It is necessary to remove the motile fusion.

As a conventional subjective optometry apparatus, for example, one having a shield plate for shielding the optical path of the inspection optical system, a drive mechanism for driving the shield plate, an opening switch for giving an operation instruction of the shield plate, a shield switch, and the like. is there. In order to remove the motor fusion using this device, the open switch and the shield switch are alternately and repeatedly pressed, or the visual field of one eye is intermittently blocked by using a palm or paper.

[0006]

However, such a conventional technique has a problem that it is inconvenient because it is necessary to perform the intermittent operation of the switch during the inspection of the oblique position and the like. In addition, there is also a problem that it is difficult to move away from the apparatus during the examination and perform an operation of pointing to the optotype because the switch is operated intermittently.

The present invention has been made in view of such conventional problems, and provides a subjective optometry apparatus capable of inspecting an oblique position and the like without performing an intermittent operation of switches. The purpose is to

[0008]

A subjective optometry apparatus for achieving the above-mentioned object is provided with a light-shielding plate capable of blocking the inspection optical path by being located in the inspection optical path, and a position in the inspection optical path. And a light blocking plate driving means for moving the light blocking plate between a light blocking position for blocking the inspection optical path and an optical path open position not located in the inspection optical path and not blocking the test optical path, and the light blocking plate for blocking the light. Position and the optical path open position alternately and intermittently instructing instruction means for instructing to position, and when the intermittent interruption is instructed by the intermittent interruption instruction operating means, the light-shielding plate and the light-shielding position Drive control means for controlling the light-shielding plate drive means so as to be alternately and repeatedly located at the optical path open position.

Further, another subjective optometry apparatus for achieving the above object is a light shielding plate which can block the inspection optical path by being located in the inspection optical path, and a light shielding plate which is located in the inspection optical path. Among the various inspection situations, a light-shielding plate driving unit that moves the light-shielding plate between a light-shielding position that blocks the inspection optical path and an optical-path open position that is not located in the inspection optical path and does not block the inspection optical path, Inspection status recognition means for recognizing the inspection status,
Intermittent shielding determination means for determining whether or not the inspection status recognized by the inspection status recognition means is a status in which it is necessary to alternately and repeatedly position the light shield plate at the light shield position and the optical path open position. When the intermittent shielding judgment means determines that the intermittent shielding is necessary, the light shielding plate driving means is arranged so that the light shielding plate is alternately and repeatedly positioned between the light shielding position and the optical path open position. And drive control means for controlling.

Here, the subjective optometry apparatus is provided with a cycle instructing operation means for instructing a cycle in which the light shielding plate is alternately and repeatedly positioned at the light shielding position and the optical path open position, and by the cycle instruction operating means, When the intermittent shielding period is instructed, the drive control unit controls the light shielding plate driving unit so that the light shielding plate is alternately and repeatedly positioned at the light shielding position and the optical path open position at the instructed period. Yes, it may be.

[0011]

When the user wants to perform the intermittent shielding for the inspection of the oblique position, the intermittent shielding instruction operating means is operated. When this is operated, the drive control means recognizes the intermittent shielding instruction and controls the light shielding plate driving means so that the light shielding plate is alternately and repeatedly positioned at the light shielding position and the optical path open position. As a result, the light blocking plate is alternately and repeatedly positioned at the light blocking position and the optical path open position, and intermittent blocking is achieved.

Further, in the case of having the inspection status recognition means, every time the inspection status is changed, the changing inspection status is sequentially recognized by the inspection status recognition means. When the intermittent shielding determination means recognizes that the inspection status recognized by the inspection status recognition means is a status in which the intermittent shielding needs to be executed, the drive control means controls the light shielding plate driving means to perform the intermittent shielding. To do.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the subjective optometry apparatus according to the present invention will be described below with reference to the drawings.

In the present embodiment, the subjective optometry system includes a subjective optometry apparatus and an optometry target apparatus (not shown) used in an examination using the optometry apparatus. . As shown in FIG. 1, the subjective optometry apparatus includes an optometry apparatus main body 10 having various optical systems and the like, an operation panel 60 for giving an instruction to drive the optical system of the main body 10, and a main body 10
And a communication cable 100 that connects the control panel 60 with the control panel 60.

As shown in FIG. 1, the main body 10 of the optometry apparatus is
It has a right-eye inspection optical system R, a left-eye inspection optical system L, and a casing 11 that covers these. Each inspection optical system R, L
As shown in FIG. 2, three lens supporting disks 12, 13, 14 in which various lenses are radially provided, and various lenses of the lens supporting disks 12, 13, 14 are the optical axes of the inspection optical system. Lens support disk 12, 13, 14 so that it is on C
A support disk rotating mechanism 15 for rotating the lens about an axis parallel to the optical axis C, two cylindrical lenses 31a and 31b having the same absolute value of the frequency and opposite plus and minus, and two cylindrical lenses 31a. , 31b for rotating the cylindrical lens rotation mechanisms 30a, 31b around the optical axis C of the inspection optical system, respectively.
And two prisms 41a having the same prism amount,
41b and prism rotating mechanisms 40a, 4 for rotating the two prisms 41a, 41b around the optical axis C of the inspection optical system.
0b and. In the casing 11, in order for the subject to see the target and the like through the inspection optical systems R and L inside the casing 11, the examinee looks into the subject on the optical axis C of the inspection optical systems R and L. A window 48 and an inspection window 49 are provided on the optotype side.

Various spherical lenses 28 and 29 having different dioptric power are provided on the first and second lens supporting disks 12 and 13, respectively.
Are provided radially. Further, as shown in FIG. 3, the third lens support disk 14 includes two polarizing plates 23 and 24 having polarization directions different from each other by 90 °, an auxiliary prism 25, and
The two types of Maddox lenses 26 and 27, the light blocking portion 22 that closes the optical path of the inspection optical system, and the opening 21 that opens the optical path of the inspection optical system are radially arranged. The light shield 22 and the opening 21 are adjacent to each other. Also,
As the auxiliary prism 25, an auxiliary prism above the base of the 6-prism diopter is provided on the third lens support disk 14 of the right-eye inspection optical system R, and the third prism of the left-eye inspection optical system L is provided.
The lens support disk 14 is provided with an auxiliary prism located inward of the 10-prism diopter base.

As shown in FIG. 2, the support disc rotating mechanism 15 includes a disc center shaft 18 which is a rotation center of the lens support discs 12, 13 and 14, and the support discs 12, 13 and 14 to form a circle. A bearing 19 rotatably attached to the plate center shaft 18, a drive gear 16 that engages with teeth formed on the outer periphery of the lens supporting disks 12, 13, 14 and a disk drive for rotating the drive gear 16. It has a pulse motor 17. In FIG. 2, the drive gear 1 of the support disk rotating mechanism 15
6 and the disc driving pulse motor 17 are provided only on the third lens supporting disc 14 farthest from the eye to be examined,
This is because of the convenience of the drawings, and in practice, it is also provided on the first and second lens supporting disks 12 and 13.

The cylindrical lens rotation mechanisms 30a and 30b are composed of cylindrical lens support frames 32a and 32b, which support the cylindrical lenses 31a and 31b on the inner peripheral side and teeth are formed on the outer peripheral side, and cylindrical lens support frames 32a and 32b. Intermediate gears 33a, 33b engaging with the teeth, drive gears 34a, 34b engaging with the intermediate gears 33a, 33b, and the drive gears 34a, 34
a cylindrical lens driving pulse motor 35a for rotating b,
35b. In addition, the prism rotation mechanism 40
Similarly to the cylindrical lens rotation mechanisms 30a and 30b, a and 40b also include support frames 42a and 42b that support the prisms 41a and 41b on the inner peripheral side and teeth are formed on the outer peripheral side, and prism support frames 42a and 42b. Intermediate gear 43 engaging with teeth
a, 43b, a drive gear engaged with the intermediate gears 43a, 43b, and a prism drive pulse motor for rotating the drive gear. The prism rotation mechanism 40
The drive gears and pulse motors of a and 40b are not shown in FIG. 1 for convenience of the drawing.

As shown in FIG. 3, the optometry apparatus main body 10 has
An interface circuit 51 to which a control signal from the operation panel 60 is input, and a main control circuit 52 that outputs a motor drive control signal to each of the motors 17, 35a, ... In response to a control instruction signal input to the interface circuit 51, It has a motor drive circuit 53 which receives a motor drive control signal and actually drives the motors 17, 35a, ....

As shown in FIG. 3, the operation panel 60 includes an input panel 61 provided with various operation switches and the like, a drive circuit 84 for the input panel 61, a liquid crystal display panel 88 for displaying inspection results and the like, and a drive circuit for the same. 87, a communication circuit 89 for transmitting an operation signal to the optometry target device, and the input panel 6
1 based on the signal from the optometry apparatus main body 10 and the communication circuit 8
9. A microcomputer 86 that creates a control signal or the like to be transmitted to the optical interface 9 and an interface circuit 85 that transmits the control signal from the microcomputer 86 to the optometry apparatus body 10.
And have.

The microcomputer 86 is a ROM (not shown) in which various programs are stored.
A CPU (not shown) that executes various calculations according to programs stored in the ROM;
RAM (not shown) for storing the calculation result of
Etc. As the programs stored in the ROM, the order of various inspections, operation contents at various inspections, and the like are stored.

On the input panel 61, as shown in FIG.
"Program optometry key" 62 for instructing the start and end of the program optometry for performing various examinations in a predetermined order
And a "forward key" 63 for advancing to the next inspection mode during programmed optometry, a "return key" 64 for returning to the previous inspection mode during programmed optometry, and a "sphere power change ( S) key "65, an" astigmatic power change (C) key "66 for instructing to change the astigmatic power, and an" astigmatic axial power change (AX) key "67 for instructing to change the astigmatic power.
And a "addition degree change (Add) key" 68 for instructing a change in the addition degree, a "prism amount change key" 69 for instructing a change in the prism quantity, and that the prism quantity is changed in the horizontal direction. A "horizontal direction change key" 71 for instructing, a "vertical direction change key" 72 for instructing that the change of the prism amount is a vertical change, and a spherical power, an astigmatic power, an astigmatic axis, an addition degree, and a prism amount. "(+) Key" to increase 7
3, a “(−) key” 74 for reducing these, a “binocular vision key” 75 for designating a binocular examination, and a “right eye” for designating operation of the right eye examination optical system. Key "7
6, a “left eye key” 77 that specifies operating the left eye inspection optical system, a “binocular key” 78 that causes the left and right inspection optical systems R and L to perform the same operation, and an optical axis of the inspection optical system. A “light-shielding key” 79a that specifies that the light-shielding portion 22 of the third lens-supporting disc 14 is located on C, and the opening 21 of the third lens-supporting disc 14 is located on the optical axis C of the inspection optical system. "Opening key" 79b for instructing to operate and polarizing plate keys 81a, 81b for instructing to position the polarizing plates 23, 24 of the third lens supporting disk 14 on the optical axis C of the inspection optical system.
On the optical axis C of the inspection optical system, and “Madox lens keys” 82a and 82b for instructing to position the Maddox lenses 26 and 27 of the third lens supporting disk 14 on the optical axis C of the inspection optical system. An "auxiliary prism key" 83 for instructing to position the auxiliary prism 25 of the third lens supporting disk 14, and a light blocking portion 22 and an opening 21 of the third lens supporting disk 14 on the optical axis C of the inspection optical system. There is provided a “cycle adjustment volume” 70 for adjusting the cycle when alternately locating.

An optotype optotype apparatus (not shown) has a communication circuit for receiving an operation signal from the eye examination apparatus and a display device for displaying an optotype for each examination according to the received operation signal. There is.

In this embodiment, the light shielding plate is composed of the light shielding portion 22 of the third lens supporting disk 14, and the light shielding plate driving means is provided in the third lens supporting disk rotation driving mechanism 15 and this. A motor drive circuit 53 for driving the disk drive pulse motor 17 is provided. Further, the intermittent shielding instruction operation means and the cycle instruction operation means are composed of a cycle adjustment volume 70. The inspection status recognition means, the intermittent shielding judgment means, and the drive control means are the microcomputer 86 and the main control circuit 56.
Is configured.

Next, the operation of the subjective optometry apparatus of this embodiment,
And its operation will be described with reference to the flowcharts shown in FIGS. First, the program optometry key 62 on the operation panel 60 is pressed. When the programmed optometry key 62 is pressed, the microcomputer 86 of the operation panel 60 sets the inspection mode to the spherical diopter inspection mode according to the preset inspection order (step 1). In this mode, the control signal for the spherical power inspection preparation is sent to the operation panel 60.
To the communication circuit 89, the display panel drive circuit 57, and the interface circuit 85. An operation signal is output from the communication circuit 89 to the optometry target device. When the optotype optotype apparatus receives the operation signal, the optotype optotype apparatus displays the visual acuity index and the red / green index for spherical power examination. The display panel drive circuit 87 causes the display panel 88 to “inspect the spherical power”.
In response to this, the display panel 88 displays "Spherical power test". The interface circuit 85 of the operation panel 60 outputs a control signal to the main control circuit 52 of the main body 10 via the interface circuit 81 of the main body 10 of the optometry apparatus. The main control circuit 52 of the main body 10 receives this control signal and outputs a motor drive control signal to the motor drive circuit 53. The motor drive circuit 53 drives the disk drive pulse motor 17 of the third lens support disk 14. Each inspection optical system R,
When the disk driving pulse motor 17 of the third lens support disk 14 for each L is driven, the third lens support disk 14 of each inspection optical system R, L rotates, and the third lens support disk 14 of the right eye inspection optical system R is rotated. The light-shielding portion 22 of the three-lens supporting disk 14 comes to be positioned on the optical axis C of this optical system (hereinafter, this position is referred to as a light-shielding position), and the third lens supporting circle of the left-eye examination optical system L. The opening 21 of the plate 14 comes to be positioned on the optical axis C of this optical system (hereinafter, this position is referred to as an opening position). As a result, the optotype can be seen by the left eye of the subject and nothing can be seen by the right eye.

When the preparation for the inspection of the spherical power is completed, the spherical power can be automatically changed without pressing the spherical power changing key 65 of the input panel 61. Then, for example, the (+) key 73 or the (-) key 7 is set so that the spherical power of the left eye of the subject acquired in advance by using the objective optometry device or the like.
Press 4. (+) Key 7 when the spherical power can be changed
When the 3 or (-) key 74 is pressed, the first lens support plate 12 and / or the second lens support plate 13 in the main body 10 is rotated, and the spherical lens capable of obtaining a desired diopter is used as the left eye inspection optical system. It comes to be located on the optical axis C of the system L. In this state, the subject's left eye sees the optotype and examines the spherical power. When the spherical power test (step 1) of the left eye is completed,
The feed key 63 of the input panel 61 is pressed. When the key 63 is pressed, the astigmatic axial degree inspection mode to be performed next is set (step 2). When the astigmatic axial power inspection is completed and the feed key 63 is further pressed, the astigmatic power inspection mode to be performed next is entered (step 3).

Here, the astigmatic axial power test and the astigmatic power test will be described. The astigmatism inspection is usually performed using one cross cylinder lens and one cylinder lens. The cross cylinder lens is, as shown in FIG. 7, a lens 1 having orthogonal axes 1a and 1b whose absolute values of power are equal to each other and whose plus and minus signs are opposite to each other.

In a normal astigmatism axial examination, first, as shown in FIG.
As shown in (a), the intermediate axis 1c of the cross cylinder lens 1 is made to coincide with the astigmatic axis of the eye to be inspected previously obtained by using the objective optometry apparatus, and the subject is provided with the cylindrical lens 2 and this cross cylinder lens. Have the target be seen through one. Subsequently, as shown in FIG. 8B, the cross cylinder lens 1 is rotated by 90 ° around its optical axis so that the subject can see through the cylindrical lens 2 and the cross cylinder lens 1.
Ask them to look at the target again. Then, ask them to compare the appearance of the optotypes seen in the previous state and the optotypes seen in the later state,
The cross-cylinder lens 1 in a good-looking state is slightly rotated in the minus axis direction, for example, about 5 °, and the cylindrical lens 2 is also rotated in the same direction by the same angle. The above operation is sequentially repeated. When the appearance does not change even if the cross cylinder lens 1 is rotated by 90 °, the position of the axis 2b of the cylindrical lens 2 at that time is used as the astigmatic axis of the eye to be inspected.

In a normal astigmatic power inspection, first,
As shown in FIG. 9A, the plus 1a of the cross cylinder lens 1 is made to match the astigmatic axis of the eye to be obtained in advance by using the objective optometry apparatus, and the subject is provided with the cylindrical lens 2 and the cross cylinder. Have the target be seen through the lens 1. Then, as shown in FIG. 9B, the cross cylinder lens 1 is rotated by 90 ° about its optical axis C (this is to make the minus axis 1b of the cross cylinder lens 1 coincide with the astigmatic axis of the eye to be examined). This is the same as the above), and the subject is asked to see the target again through the cylindrical lens 2 and the cross cylinder lens 1. Then, ask them to compare the visual appearance of the optotypes seen in the previous state and the optotypes seen in the later state. If the previous state looks better, add the astigmatic power plus If the condition looks better, add the astigmatic power minus. Then, each time the power is changed, the cross cylinder lens 1 is rotated by 90 °, and the state before the rotation and the state after the rotation are compared. When the appearance does not change even when the cross cylinder lens 1 is rotated by 90 °, the power at that time is taken as the power of the eye to be inspected.

By the way, in this embodiment, since the cross cylinder lens 1 is not provided, in the case of astigmatism inspection,
As shown in FIG. 10, instead of the inspection by the combination of the cross cylinder lens 1 and the cylindrical lens 2, the inspection is executed by the combination of the two cylindrical lenses 31a and 31b and the two spherical lenses 28 and 29. It should be noted that the figure shows an astigmatic axial examination method, and (a) and (b) show around 90 ° rotation. Further, in the figure, the left side shows the astigmatism inspection method using the cross cylinder lens 1, and the right side shows the astigmatism inspection method of the present embodiment that does not use the cross cylinder lens 1. Reference numeral 3 indicates a virtual lens equivalent to a combination of the cross cylinder lens 1 and the cylindrical lens 2.

In this embodiment, the operation corresponding to the rotation of the cross cylinder lens 1 is the two cylindrical lenses 31.
By the relative rotation of a and 31b, the astigmatic power changing operation is the relative rotation of the two cylindrical lenses 31a and 31b and / or the changing operation of the spherical lenses 28 and 29. However, when the astigmatic power is changed only by rotating the two cylindrical lenses 31a and 31b, both lenses 31a are rotated by the same angle so that the astigmatic axis does not rotate due to the combination of the lenses 31a and 31b. , 31b in the opposite direction.

Returning to the story, when the astigmatism axial examination mode is entered (step 2), the astigmatism examination target is displayed on the optometry target device, and the display panel 88 displays "Astigmatism axialness examination".
Is displayed. Further, the astigmatic axial degree changeable state is automatically set, which is substantially the same as the state in which the cross cylinder lens 1 is mounted. The inspector then uses the two cylindrical lenses 31a and 31b and the two spherical lenses 28 and 29.
The (+) key 73 or the (-) key 74 is pressed so that the astigmatic axis obtained as a result of the combination with and becomes the target angle. When the (+) key 73 or the (-) key 74 is pressed after pressing the astigmatic axis changing key 67, the cylindrical lens driving mechanisms 30a, 30 in the main body 10 are pressed.
b is driven, and the cylindrical lenses 31a and 31b move their optical axes C.
Rotate around. In this state, after the subject sees the visual target, the cross cylinder rotation key 90 is pressed to rotate the virtual cross cylinder lens by 90 °. After that, as described above, after confirming with the examinee the appearance before and after the rotation, the astigmatic axis is slightly rotated after returning to the one with a good appearance, and the virtual cross cylinder lens is again used. The astigmatic axial degree is inspected by repeating the operation of rotating by 90 °.

Astigmatic power inspection mode (step 3)
Then, the “Astigmatism diopter inspection” is displayed on the display panel 88 and the astigmatism diopter can be changed. The inspector then uses the (+) key 73 or the (-) key so that the astigmatic power obtained by the combination result of the two cylindrical lenses 31a and 31b and the two spherical lenses 28 and 29 becomes the desired power. 7
Press 4. And cross cylinder rotation keys 90, 9
Press 1 to check the appearance of the visual target before and after the rotation of the virtual cross cylinder lens and return it to the one with a better visual appearance, and then press the (+) key 73 or the (-) key 74. When these keys 73 and 74 are pressed, the cylindrical lens drive mechanism 3
0a and 30b are driven, and as described above, the two cylindrical lens lenses 31a and 31b rotate in the opposite directions by the same angle, and the power changes. In astigmatism power inspection mode
When the (+) key 73 or the (-) key 74 is pressed, the operation panel 6
In response to an instruction from the microcomputer 86 within 0, the first and / or second lens supporting disks 12 and 13 rotate to correct the spherical power generated by combining the two cylindrical lenses 31a and 31b. After that, as described above, each time the power is changed, the operation of rotating the virtual cross cylinder lens is repeated to inspect the astigmatic power.

In steps 2 and 3, if the rotation process of the cylindrical lenses 31a and 31b is visible to the subject, the subject is confused and the progress of the examination is hindered. Therefore, in this embodiment, the cylindrical lenses 31a and 31b are used.
While the lens is rotating, the light-shielding portion 22 of the third lens supporting disk 14 is placed on the inspection optical axis C so that the subject cannot see this process.
Will be located on top. To achieve this, here
From the motor drive circuit 53 to the cylindrical lens drive motor 35
When a pulse signal is output to a and 35b, the pulse signal is also output from the motor drive circuit 53 to the third lens support disk drive motor 17, so that the light shield portion 22 of the third lens support disk 14 is in the light shield position. And a cylindrical lens driving motor 35
When the driving of a and 35b is completed, the third lens support disk 14 is rotated again so that the opening 21 of the third lens support disk 14 is located at the opening position. The above control of the motor drive circuit 53 is performed by the mainn control circuit 52.
And the microcomputer 86 of the operation panel 60.

When the astigmatic power examination of the left eye (step 3) is completed, the feed key 63 of the input panel 61 is pressed. When this key 63 is pressed, the virtual cross cylinder lens is removed and the spherical power precision inspection mode to be performed next is set (step 4). In the spherical power precision inspection mode, the optotype apparatus for optometry again displays the target for spherical power test, and the display panel 88 also displays “spherical power test”. Then, the complete correction diopter of the left eye is inspected by the same operation as the above-mentioned spherical diopter examination (step 1).

When the spherical power examination of the left eye (step 4) is completed, the feed key 63 of the input panel 61 is pressed. When the key 63 is pressed, the microcomputer 86 determines whether or not the inspection of both eyes is completed (step 5), and when the inspection of only one eye is completed, the microcomputer 86 returns to step 1 again. , Processing up to step 4 is executed. If the examination of both eyes is completed, the binocular balance examination mode (step 6) is entered. When returning to step 1 again, when the feed key 63 is pressed, the left eye examination has been performed so far, so that the right eye examination can be performed, the third lens supporting disk of the right eye examination optical system R can be used. The opening 21 of 14 is located at the opening position, and the light blocking portion 22 of the third lens support disk 14 of the left-eye examination optical system L is located at the light blocking position. Further, when the power changing key 65, the astigmatic power changing key 66, or the like is pressed, the right eye inspection optical system is activated.

When the binocular balance inspection mode is set (step 6), this judgment (step 5) is made. In the programmed optometry, the binocular balance optotype is displayed on the optotype optotype apparatus, and the display panel 88 is displayed. "Binocular balance test" is displayed on. Further, the third lens supporting disk 14 of the right eye inspection optical system R and the third lens supporting disk of the left eye inspection optical system L rotate, and the deflection direction is perpendicular to the optical axis C of each inspection optical system. The polarizing plates 23 and 23 'come to be positioned. At this time, a polarizing plate 23 having a polarization axis of 45 ° is located on the optical axis of the right eye inspection optical system, and a polarizing plate 23 ′ having a polarization axis of 135 ° is located on the optical axis of the left eye inspection optical system. Is located. It should be noted that the binocular balance target is a part that can be seen only by the right eye as a result of passing through the polarizing plate 23, and a target that is only visible by the left eye as a result of passing through the polarizing plate 23 ′, and the polarizing plates 23 and 23 ′. However, the part visible on both sides is displayed. In the binocular balance test, the subject is shown a binocular balance target, and the visual acuity of the left and right eyes is compared at a completely corrected diopter, and the spherical diopter is adjusted so as to align with the one with poor visual acuity.

When the binocular balance inspection is completed, the feed key 63 of the display panel 61 is pressed to bring the apparatus into the eye position abnormality determination mode (step 7). When the eye position abnormality determination mode is entered, the stereoscopic target is displayed on the optometry target device, and “eye position abnormality determination” is displayed on the display panel 88. In the eye position abnormality inspection mode, the polarizing plates 23 and 23 'whose deflection direction is vertical are located on the optical axis C of each inspection optical system following the binocular balance inspection (step 6). As a result of passing through the polarizing plate 23, a plurality of sets of targets are displayed on the stereoscopic target as a set of a target which can be seen only by the right eye and a target which can be seen only by the left eye as a result of passing through the polarizing plate 23 '. Has been done. Then, it is checked whether the stereoscopic vision of the subject is normal. At this time, whether or not the target is normal is determined based on which set of targets is stereoscopically viewed among the plurality of sets of targets. If normal,
The programmed optometry key 62 on the input panel 61 is pressed to end the programmed optometry. If the stereoscopic vision is abnormal, the feed key 63 is pressed to perform the eye position examination by the von Graefe method (steps 8 and 9).

If the stereoscopic vision is abnormal, the feed key 63
When is pressed, the device is in the horizontal oblique inspection mode (step 8). This horizontal oblique examination will be described with reference to the flowchart shown in FIG.

In the horizontal phoria inspection mode, the optotype optotype apparatus displays vertical single-line character optotypes as shown in FIG. 11 and the display panel 88 displays "horizontal phoria test". (Step 11). Subsequently, the third lens supporting disk 14 of the right-eye inspection optical system R rotates, and the auxiliary prism 25 above the 6-prism diopter base of the supporting disk 14 is positioned on the inspection optical axis C. (Step 12), the third lens support disk 14 of the left-eye inspection optical system L rotates, and the openings 21 and the light shields 22 of the support disk 14 are alternately positioned on the inspection optical axis C. That is, the intermittent shielding is performed (step 13). After that, this intermittent shielding is performed until the horizontal phoria inspection mode ends. This intermittent shielding is achieved by instructing the microcomputer 86 to invert the supporting disk drive motor 17 by reciprocating it at regular intervals via the main control circuit 52 and the motor drive circuit 53. In addition, in this intermittent shielding, it is generally desirable that the length of the light shielding time and the length of the opening time are each 1 second, but it is preferable to change this cycle depending on the subject. In such a case, the period adjusting volume 70 is operated to change the light blocking / opening period.

In the horizontal phoria test, as described in "Prior Art", the auxiliary prism 25 determines to the subject whether or not the image divided into the upper and lower parts is shifted to the left or right. Get (step 14). As shown in FIG. 12B, when the upper image is displaced to the right with respect to the lower image, the + (in) key 73 of the input panel 61 is pressed. Then, the prism drive mechanisms 40a, 4a of the left-eye examination optical system L
0b drives the two prisms 4 of the left-eye examination optical system L.
1a and 41b rotate around the optical axis C, and the two prisms 4
The prism amount obtained by combining 1a and 41b is changed to the inner side of the base (step 15). Then, again, step 14
Return to and ask the subject to judge whether the image that is divided into two parts, top and bottom, is shifted to the left or right. Further, as shown in FIG. 12C, when the upper image is displaced to the left with respect to the lower image,-(out) of the input panel 61 is displayed.
Press the key 74. Then, the prism drive mechanisms 40a and 40b of the left-eye inspection optical system L are driven to drive the left-eye inspection optical system L.
The two prisms 41a and 41b are rotated about the optical axis C, and the prism amount obtained by combining the two prisms 41a and 41b is changed to the outside of the base (step 16). Then, the process returns to step 14 again, and the subject is asked to determine whether the image that is divided into the upper and lower two images is shifted to the left or right. In step 14, when the subject judges that the two vertically visible images are not displaced to the left or right, the prism amount change amount at that time is the ectopic correction amount.

When the horizontal phoria inspection (step 8) is completed, the feed key 63 of the input panel 61 is pressed to put the apparatus in the vertical eccentricity inspection mode (step 9). In the vertical phoria inspection mode, the optometry target device displays the vertical phoria test target and the display panel 88 displays “vertical phoria test”. Subsequently, the third lens supporting disk 14 of the left-eye inspection optical system L rotates, and the auxiliary prism located inside the 10-prism diopter base of the supporting disk 14 is located on the inspection optical axis C. , The third lens supporting disk 14 of the right-eye inspection optical system R rotates, and the opening 21 and the light-shielding section 2 of the supporting disk 14 on the inspection optical axis C are rotated.
2 and 2 are located alternately. After that, this intermittent shielding is performed until the horizontal phoria inspection mode ends.

In the vertical oblique examination, the auxiliary prism 25 causes the subject to judge whether the image which is divided into the left and right images is shifted up or down, and the input panel is selected according to the situation. 61 (+) key 73 or-
Press the (down) key 74. When the + (up) key 73 or the- (down) key 74 is pressed, the prism drive mechanisms 40a and 40b of the right-eye inspection optical system R are driven to drive the two prisms 41a and 41b of the right-eye inspection optical system R. Is the optical axis C
By rotating around, the prism amount obtained by combining the two prisms 41a and 41b changes to the upper side or the lower side of the base.
Then, when the subject judges that the image that is divided into the left and right two images is not displaced in the upper and lower directions, the change amount of the prism amount at that time becomes the eccentricity correction amount.

When the vertical oblique examination is completed, the input panel 6
The feed key 63 of 1 or the programmed optometry key 62 is pressed to end the programmed optometry. When the programmed optometry is completed, the opening 21 of the third support disk 14 is located on the examination optical axis C of each of the optometry optical systems R and L.

By the way, the subjective optometry apparatus of this embodiment is
Not only the above program optometry but also manual optometry is possible. It should be noted that the manual optometry here means to perform a specific examination according to the inspector's preference, not according to the examination order stored in the microcomputer 86.

For example, when performing a horizontal phoria test by manual optometry, first, the prism key 69 is pressed. When the prism key 69 is pressed, the microcomputer 86
Can recognize that it is an oblique examination, so that the left and right examination optical systems can be inspected by binocular vision. next,
After pressing the right eye key 76, the auxiliary prism key 83 is pressed to position the auxiliary prism 25 of the right eye optometry optical system on the inspection optical axis C. Then, after pressing the left eye key 77,
By pressing the horizontal direction change key 71, the amount of the combined prism by the two prisms 41a and 41b of the left-eye examination optical system L is changed to the inside of the base or the outside of the base. next,
The cycle adjusting volume 70 is operated to start the intermittent occlusion of the left eye optometry system, and the intermittent occlusion cycle is set to the target cycle. Then, the + (in) key 73 or- (ou
t) The key 74 is pressed to change the prism amount obtained by combining the two prisms 41a and 41b of the left-eye examination optical system L to the inside of the base or the outside of the base.

As described above, according to the present embodiment, in the programmed optometry, the microcomputer 86 recognizes this when the oblique examination mode is entered, and the examination optical path is automatically interrupted and interrupted. When the cycle adjusting volume 70 is operated, the inspection optical path is interrupted and interrupted, so that it is not necessary to perform an intermittent operation of the switch during the oblique position inspection.

In this embodiment, the lens supporting disk 14 is used.
Although the light-shielding portion 22 and the opening 21 are provided on the lens-supporting disc 14 and the lens-supporting disc 14 is used as the light-shielding plate, the present invention is not limited to this. May be provided, and this may be operated by a rotary solenoid or the like.

[0049]

According to the present invention, when the intermittent shielding instruction operating means is operated, or when it is recognized that the intermittent shielding is required, the intermittent shielding of the inspection optical path is performed, so that the oblique position is performed. Without performing intermittent operation of switches during inspection of
It is possible to perform inspections such as oblique position.

[Brief description of drawings]

FIG. 1 is a front view of a subjective optometry apparatus according to an embodiment of the present invention.

FIG. 2 is a cutaway side view of a main part of the subjective optometry apparatus according to one embodiment of the present invention.

FIG. 3 is a circuit block diagram of the subjective optometry apparatus according to one embodiment of the present invention.

FIG. 4 is a front view of the input panel of the subjective optometry apparatus according to one embodiment of the present invention.

FIG. 5 is a flowchart showing an examination procedure by the subjective optometry apparatus according to one embodiment of the present invention.

FIG. 6 is a flowchart showing a horizontal phoria inspection procedure by the subjective optometry apparatus according to one embodiment of the present invention.

FIG. 7 is a front view of a cross cylinder lens.

FIG. 8 is an explanatory diagram for explaining a conventional astigmatism axial degree inspection method.

FIG. 9 is an explanatory diagram for explaining a conventional astigmatic power inspection method.

FIG. 10 is an explanatory diagram for explaining an astigmatism axial degree inspection method and an astigmatism diopter inspection method by the subjective optometry apparatus according to one embodiment of the present invention.

FIG. 11 is a front view of an optotype for horizontal oblique examination.

FIG. 12 is an explanatory diagram for explaining a horizontal phoria inspection method.

[Explanation of Codes] 10 ... Optometry apparatus main body, 12, 13, 14 ... Lens support disc, 15 ... Support disc rotation drive mechanism, 21 ... Opening part, 22
... Light-shielding part, 25 ... Auxiliary prism, 30a, 30b ... Cylindrical lens rotation drive mechanism, 31a, 31b ... Cylindrical lens, 4
0a, 40b ... Prism rotation drive mechanism, 41a, 41b
... Prism, 52 ... Main control circuit, 53 ... Motor drive circuit, 60 ... Operation panel, 61 ... Input panel, 70
… Cycle control volume, 86… Microcomputer,
88 ... Display panel.

Claims (3)

[Claims] 1. Positioning various optical members in an inspection optical path,
In the subjective optometry apparatus for inspecting the refractive power of an eye to be inspected, a light blocking plate that can block the inspection optical path by being located in the inspection optical path, and a light shield that is located in the inspection optical path and blocks the inspection optical path A light-shielding plate driving means for moving the light-shielding plate between a position and an optical-path opening position that is not located in the inspection light-path and does not close the inspection light-path; and the light-shielding plate as the light-shielding position and the optical-path opening position. When the intermittent shielding is instructed by the intermittent shielding instruction operation means for instructing to alternately and repeatedly position the light shielding plate, the light shielding plate alternates between the light shielding position and the optical path open position. A subjective eye examination apparatus comprising: drive control means for controlling the light-shielding plate drive means so as to be repeatedly positioned. 2. Positioning various optical members in the inspection optical path,
In the subjective optometry apparatus for inspecting the refractive power of an eye to be inspected, a light blocking plate that can block the inspection optical path by being located in the inspection optical path, and a light shield that is located in the inspection optical path and blocks the inspection optical path A light-shielding plate drive means for moving the light-shielding plate between a position and an optical path open position that is not located in the inspection optical path and does not block the inspection optical path, and recognizes the current inspection status among various inspection statuses. Whether or not the inspection status recognized by the inspection status recognition unit and the inspection status recognized by the inspection status recognition unit are required to alternately position the light shielding plate at the light shielding position and the optical path open position. When the intermittent shielding judgment means for judging and the intermittent shielding judgment means judge that the intermittent shielding is necessary, the light shielding plate is alternately positioned at the light shielding position and the optical path open position. , Visual acuity testing apparatus characterized by and a driving control means for controlling the serial light-shielding plate driving means. 3. A cycle instructing operation means for instructing a cycle in which the light shielding plate is alternately and repeatedly positioned at the light shielding position and the optical path open position, and the cycle instructing operation means instructs an intermittent shielding cycle. Then, the drive control means controls the light-shielding plate drive means such that the light-shielding plate is alternately and repeatedly positioned at the light-shielding position and the optical path open position at a designated cycle. Item 1. The subjective optometry apparatus according to Item 1 or 2.