JP2017099640A - Optometer and optometry program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an optometer, when performing monocular examination, with both eyes opened, capable of easily setting a fogging state suited to a subject, and an optometry program.SOLUTION: The optometer for examining subject's eyes, includes: a pair of left/right lens units disposed on optical paths of luminous flux of optotypes projected to the subject's eyes and changing optical characteristics of the luminous flux of the optotypes; control means for controlling drive of the lens units; and acquisition means for acquiring target visual acuity values in fogging. The control means determines an amount of fogging for fogging the subject's eyes on the basis of the target visual acuity values acquired by the acquisition means.SELECTED DRAWING: Figure 7

Description

  The present disclosure relates to an optometry apparatus for inspecting an eye to be examined, and an optometry program.

  A pair of left and right lens units are provided with a plurality of rotating discs each having various optical elements arranged thereon, and by rotating the rotating discs, optical elements having desired optical characteristics are switched and arranged on the optometry window to refract the eye to be examined. There is known an optometry apparatus for subjectively examining force.

  In the correction refractive power test by this type of optometry apparatus, the left and right eyes are individually examined. The eye to be examined (hereinafter referred to as the measuring eye) is caused to observe the examination target via an optical element arranged in the optometry window. A non-inspected eye (hereinafter referred to as a non-measuring eye) is provided with a shielding plate provided on one of the rotating disks in the optometry window so that the inspection target is not visible.

  In addition, there is also known a method of performing an inspection with both eyes open, in which a positive spherical power is applied and a cloud is applied to one eye without placing a shielding plate on the non-measuring eye side.

JP H10-285470

  However, since the appearance in the corrected state is different for each subject, it may be necessary to adjust the frequency to be added for applying the fog.

  In view of the conventional problems, the present disclosure provides a optometry apparatus and an optometry program that can easily set a cloud state suitable for a subject when performing a one-eye examination with both eyes open. Let it be an issue.

  In order to solve the above problems, the present disclosure is characterized by having the following configuration.

(1) An optometry apparatus for inspecting an eye to be examined, which is disposed in an optical path of a target luminous flux projected onto a subject, and a pair of left and right lens units that change optical characteristics of the target luminous flux, Control means for controlling the driving of the lens unit, and acquisition means for acquiring a target visual acuity value at the time of cloud fog, the control means based on the target visual acuity value acquired by the acquisition means. The method is characterized in that the amount of fog for clouding the optometer is determined.
(2) An optometry apparatus for inspecting an eye to be examined, which is disposed in an optical path of a target luminous flux projected onto a subject and a pair of left and right lens units that change optical characteristics of the target luminous flux, A control unit that controls driving of the lens unit; and an acquisition unit that acquires a visual acuity value of the subject. The control unit is configured to control the eye according to the visual acuity value acquired by the acquisition unit. It is characterized by correcting the amount of cloud fog for causing fog.
(3) An optometry program executed in an optometry apparatus for inspecting an eye to be examined, which is executed by the processor of the optometry apparatus to obtain a target visual acuity value at the time of cloud fog and an eye acuity value of the eye to be examined The optometry apparatus is configured to execute an acquisition step of determining, and a determination step of determining a cloud amount to be added to cloud the eye to be examined based on the target visual acuity value and the measured visual acuity value. .

It is the schematic which showed the whole optometry system of a present Example. It is the external appearance schematic which looked at the optometry apparatus of a present Example from the subject side. It is a horizontal sectional view of the optometry apparatus of a present Example. It is a figure for demonstrating an auto cross cylinder lens. It is a control system block diagram of a present Example. It is a flowchart which shows operation | movement of a present Example. It is a figure which shows the setting screen of a cloud fog parameter. It is a figure explaining calculation of the amount of cloud fog. It is a figure explaining how a point cloud chart looks. It is a figure explaining how a point cloud chart looks. It is a figure explaining rotation control of an auto cross cylinder lens. It is a figure which shows an example of the display screen of a controller. It is a figure explaining how the visual target looks at the time of cloud fog. It is a figure for demonstrating an eye figure.

  Hereinafter, the first embodiment according to the present disclosure will be briefly described. The optometry apparatus (for example, the optometry apparatus 100) of the first embodiment inspects the eye to be examined, for example. The optometry apparatus may include, for example, a lens unit (for example, the lens unit 110), an acquisition unit (for example, the control unit 370), and a control unit (for example, the control unit 370). For example, the lens unit is provided as a pair of left and right. For example, the lens unit is disposed in the optical path of the target luminous flux projected onto the subject. For example, the lens unit changes the optical characteristics of the target luminous flux. For example, the lens unit may include an optometry window (for example, an optometry window 160). The lens unit may be arranged by switching a plurality of lenses in the optometry window. The plurality of lenses may be, for example, a spherical lens, a cylindrical lens, an auxiliary lens, or the like.

  An acquisition part acquires the target visual acuity value at the time of cloud fog. The target visual acuity value may be, for example, a visual acuity value when applying a cloud to a non-measuring eye (referred to as a non-measuring eye). As a result, by applying a cloud to the non-measuring eye, Visual acuity may be limited. In this case, the measurement eye may be inspected in a state where the non-measurement eye is clouded. For example, the acquisition unit may acquire the target visual acuity value based on an operation signal output from the operation unit (for example, the controller 300) in accordance with the operation of the examiner.

  For example, the control unit controls driving of the lens unit. For example, the control unit may control driving such as switching of lenses arranged in the optometry window, rotation of lenses arranged in the optometry window, and the like. For example, the control unit may determine the amount of fog for causing the eye to be fogged based on the target visual acuity value acquired by the acquisition unit. As a result, for example, the examiner can easily perform an examination in a state in which the fog is applied with a desired visual acuity value.

  Note that the acquisition unit may further acquire the visual acuity value of the subject, for example. The visual acuity value of the subject may be, for example, a visual acuity value acquired by a subjective examination, or may be a visual acuity value estimated according to the correction state of the subject eye. The acquisition unit may acquire a visual acuity value when inspecting one eye at a time, or may acquire an acuity value when inspecting with both eyes. In this case, the control unit may determine the cloud amount based on the target visual acuity value acquired by the acquisition unit and the visual acuity value of the subject.

  For example, the control unit may determine the cloud amount based on the frequency according to the target visual acuity value and the correction value according to the visual acuity value of the subject. Here, the correction value may be a frequency obtained by converting the degree of blurring of the visual acuity value of the subject. For example, the correction value may be a value obtained by converting a deviation between the imaging position of the inspection target incident on the eye to be examined and the position of the retina of the eye to be converted into the lens power in a state where the eye to be examined is corrected. .

  In addition, when the eyesight value of the subject is acquired by the acquisition unit, the control unit corrects the amount of cloud for causing the eye to be fogged according to the eyesight value of the subject acquired by the acquisition unit. Also good. For example, the control unit may correct a predetermined amount of cloud according to the visual acuity value of the subject.

  The control unit may cause the optometry apparatus to execute the optometry program stored in the storage unit (for example, the storage unit 340). For example, the optometry program includes an acquisition step and a determination step. An acquisition step is a step which acquires the target visual acuity value at the time of cloud fog, and the visual acuity value of a subject, for example. The determining step is a step of determining the amount of fog for causing the subject's eye to fog based on the target visual acuity value and the measured visual acuity value, for example.

  In addition, the optometry apparatus of 1st Embodiment may arrange | position a prism lens with respect to a non-measuring eye, and may perform the one eye test | inspection in a binocular release state by removing the eyes | visual_axis of a non-measuring eye from a test | inspection target. . In this case, the acquisition unit may acquire the subject's prism value. Further, the control unit may determine the prism value of the prism lens to be arranged with respect to the subject's eye according to the subject's prism value acquired by the acquisition unit by the acquisition unit. Thus, the optometry apparatus can reliably remove the line of sight of the non-measuring eye from the examination target.

  Hereinafter, the second embodiment according to the present disclosure will be briefly described. The optometry apparatus (for example, the optometry apparatus 100) of the second embodiment includes, for example, a lens unit (for example, the lens unit 100), a drive unit (for example, the drive units 150R and 150L), and a control unit (for example, the control unit 370). ) Etc. For example, the lens unit is disposed in each of the first optical path and the second optical path. Here, the first optical path is, for example, the optical path of the target luminous flux projected onto the right eye of the subject, and the second optical path is the optical path of the target luminous flux projected onto the left eye of the subject. . For example, the lens unit may include at least an auto-cross cylinder lens. In this case, the lens unit changes the optical characteristics of the target luminous flux in the first optical path and the second optical path by at least an auto-cross cylinder lens. For example, the auto cross cylinder lens separates the field of view of the eye to be examined by a prism component. For example, the auto cross cylinder lens separates the field of view of the eye to be examined so that one examination target can be seen as two.

  For example, the driving unit may rotationally drive lenses arranged in the first optical path and the second optical path. The control unit controls driving of the driving unit, for example. For example, the control unit is driven so that the separation direction of the inspection target separated by the auto cross cylinder lens respectively disposed in the first optical path and the second optical path is the same direction in the first optical path and the second optical path. The driving of the unit may be controlled. For example, the control unit may arrange the autocross cylinder lens in the first optical path and the second optical path so that the first optical path and the second optical path have the same axis angle. . As a result, the target eye separation direction is the same between the measuring eye and the non-measuring eye that is clouded, and an appropriate examination can be performed with both eyes open.

  The drive unit may include a rotation drive unit that changes the rotation angles of the lenses disposed in the first optical path and the second optical path. In this case, the control unit controls the driving of the rotation driving unit, so that the axial angle of the auto cross cylinder lens arranged in the first optical path and the second optical path is kept the same in the first optical path and the second optical path. It may be rotated in conjunction with each other. For example, when the auto-cross cylinder lens is rotated by the rotation driving unit, the control unit may match the rotation direction and the rotation amount of the auto-cross cylinder lens respectively disposed in the first optical path and the second optical path.

  In addition, a control part may make the rotational speed of the autocross cylinder lens respectively arrange | positioned at a 1st optical path and a 2nd optical path correspond, when rotating an autocross cylinder lens by a rotation drive part.

  Note that the processor of the control unit may cause the optometry apparatus to execute the optometry program stored in the storage unit (for example, the storage unit 340). The optometry program includes, for example, a control step. The control step includes, for example, a first optical path that is an optical path of the target luminous flux projected onto the right eye of the subject by the lens unit and an optical path of the target luminous flux projected onto the left eye of the subject. The step of controlling the driving of the lens unit so that the separation direction of the inspection target observed through the auto-cross cylinder lens respectively disposed in the two optical paths is the same in the first optical path and the second optical path It is.

  Note that the lens unit may include, for example, an optometry window (for example, an optometry window 160) through which the subject looks into and looks at the examination target. In this case, a plurality of lenses including an auto-cross cylinder lens are switched between a right optometry window (for example, the right optometry window 160R) on the first optical path and a left optometry window (for example, the left optometry window 160L) on the second optical path. May be.

  Even when a lens having a prism component that separates at least two inspection targets, such as an auto-cross cylinder lens, is provided, the inspection is observed through lenses disposed in the first optical path and the second optical path, respectively. You may control the drive of a drive part so that the separation direction of a target may become the same direction in a 1st optical path and a 2nd optical path. In this case, the optometry apparatus according to the second embodiment is an optometry apparatus that examines the subject's eye, and includes a first optical path that is an optical path of a target luminous flux projected onto the right eye of the subject, and the left of the subject. A pair of left and right optical paths that are respectively disposed in a second optical path that is an optical path of a target luminous flux projected onto the eye and that changes optical characteristics of the target luminous flux in the first optical path and the second optical path by a lens having at least a prism component, respectively. A lens unit; a driving unit that drives the lens unit; and a control unit that controls driving of the driving unit. The control unit includes a prism component disposed in each of the first optical path and the second optical path. It may be expressed as an optometry apparatus characterized by controlling the drive of the drive unit so that the separation direction of the inspection target to be observed is the same in the first optical path and the second optical path.

  Hereinafter, the third embodiment according to the present disclosure will be briefly described. The optometry information display device (for example, a display terminal such as the controller 300) of the third embodiment displays optometry information of the eye to be examined. The optometry information may be, for example, the examination status of the eye to be examined, the examination result, and the like. The optometry information display apparatus may include, for example, a control unit (for example, the control unit 370). For example, the control unit causes the binocular simulation image to be displayed on the display unit (for example, the display unit 320). The binocular simulation image shows, for example, how it looks when the inspection target is viewed with both eyes. The binocular simulation image may be, for example, one (single) image. The binocular simulation image is, for example, a single simulation image that assumes that an inspection target is viewed with a measuring eye corrected by a lens unit or the like and a non-measuring eye that is clouded by a lens unit or the like. There may be. That is, the binocular simulation image is obtained with each of the left and right eyes when viewing the inspection target with the measuring eye corrected by the lens unit or the like and the non-measuring eye clouded by the lens unit or the like. It may be a single simulation image in which the retinal image is fused in the brain. For example, when cloud is applied to the non-measuring eye, the difference in appearance between the measuring eye and the non-measuring eye is large, so it is difficult to imagine how the eyes are seen with both eyes. Even in such a case, since the binocular simulation image is displayed, the examiner can easily grasp how the image is viewed with both eyes.

  Note that the control unit may further display a one-eye simulation image on the display unit, for example. The one-eye simulation image is, for example, at least one of a right-eye simulation image and a left-eye simulation image. The right eye simulation image is an image that shows how the right eye sees when the inspection target is viewed, for example. The left-eye simulation image is an image that shows how the left eye sees when the inspection target is viewed, for example. By displaying the binocular simulation image and the one-eye simulation image, the examiner can easily grasp the relationship between the appearance with one eye and the appearance with both eyes.

  The control unit may set the sharpness of at least one of the binocular simulation image and the one-eye simulation image based on the visual acuity value of the eye to be examined. The visual acuity value of the eye to be examined may be, for example, a value obtained by visual acuity examination, a value arbitrarily input by the examiner, or a value estimated based on the correction state of the examinee. For example, the visual acuity value of the eye to be examined may be a visual acuity value estimated when the eye to be examined is fogged, or based on correction information of the eye to be examined that is corrected by the correction unit (for example, the lens unit 110). It may be an estimated visual acuity value. Here, the sharpness may be, for example, at least one of image blur, color vividness, contrast, resolution, brightness, and the like.

  Note that the control unit may set the clarity of the binocular simulation image based on the higher one-eye vision value of the left and right one-eye vision values. In general, the visual appearance of both eyes is often given priority to the visual appearance of the left and right eyes. Therefore, the control unit may determine the sharpness of the binocular simulation image based on how the eye with higher visual acuity is seen.

  Note that the control unit may change the sharpness of the simulation image of at least one of both eyes and one eye according to a change in the power of the correction optical system of the correction unit that corrects the eye to be examined. Thus, the examiner can easily grasp the change in the correction state of the subject and the change in the appearance at that time.

  Note that the control unit may display the eye map on the display unit. The eye diagram is a diagram in which, for example, at least the eye to be examined and the imaging position of the target luminous flux incident on the eye to be examined are depicted. By displaying the eye map, the examiner can easily grasp the appearance of the subject objectively. The ophthalmogram may also include a depiction of the correction optical system that is placed in front of the eye of the subject's eye. For example, the control unit may change the depiction of the eye diagram in accordance with a change in the correction state of the eye to be examined which is corrected by the correction unit. For example, the control unit may change the imaging position of the target luminous flux, the shape of the correction optical system, the number of lenses, and the like.

  For example, the processor of the control unit may cause the optometry information display device to execute an optometry information display program stored in a storage unit (for example, the storage unit 340). The optometry information display program includes, for example, a display step. The display step is, for example, a step of displaying a binocular simulation image showing how the eye is viewed when viewing the inspection target with both eyes on the display unit.

In the description of the above embodiment, the lens unit of the optometry apparatus may be disposed on the subject side (for example, in front of the eye of the subject eye) or may be disposed on the optotype presenting apparatus side. For example, the lens unit may be arranged inside a target presentation device (for example, a target presentation device 200) (so-called phantom type). In this case, the optotype presenting apparatus may be configured to project a target luminous flux whose optical characteristics have been corrected by a lens unit disposed therein onto the eye to be examined. Here, the optotype presenting apparatus is, for example, an apparatus that projects an inspection optotype on a subject.
Note that the lens unit that changes the optical characteristics of the target luminous flux is not limited to the lens switching mechanism, and may have a configuration in which an Alvarez lens is arranged in the lens unit.

<Example>
Hereinafter, the optometry system 500 of the present embodiment will be described. As illustrated in FIG. 1, the optometry system 500 according to the present embodiment includes, for example, an optometry apparatus 100, an optotype presenting apparatus 200, a controller 300, a relay unit 400, and the like. For example, the optometry apparatus 100 is suspended from the holding arm 5. One end of the holding arm 5 is fixed to the base 10.

<Optometry device>
As shown in FIG. 2, the optometry apparatus includes a pair of left and right lens units 110 (a left lens unit 110L and a right lens unit 110R). The lens unit 110 includes a lens disk 120 (left lens disk 120L, right lens disk 120R). The lens disk 120 is rotatably held by the lens unit 110 (see FIG. 2). A large number of optical elements (spherical lens, cylindrical lens, dispersion prism, etc.) are arranged on the same circumference on the lens disk 164. When the lens disk 120 is rotationally controlled by the drive units (actuators) 130R and 130L, optical elements desired by the examiner are arranged in the optometry window 160 (the left optometry window 160L and the right optometry window 160R). Further, the optical element (for example, a cylindrical lens, a cross cylinder lens, a rotary prism, etc.) disposed in the optometry window 160 is controlled to rotate by the driving units 150R and 150R, so that the optical element can be rotated at a rotation angle desired by the examiner. Is placed. Switching of the optical elements arranged in the optometry window 160 is performed by operating a controller 300 (see FIG. 1) that is an operation means. The drive units 130R and 130L and the drive units 150R and 150L are, for example, motors or solenoids, but are not limited thereto.

  The lens unit 110 may include a plurality of lens disks. For example, each lens disk includes an aperture (or 0D lens) and a plurality of optical elements. As the types of lens disks, as shown in FIG. 3, for example, spherical lens disks 121R and 121L, cylindrical lens disks 122R and 122L, auxiliary lens disks 123R and 123L, and the like can be mentioned. The spherical lens disks 121R and 121L have, for example, a plurality of spherical lenses having different frequencies. The cylindrical lens disks 122R and 122L have, for example, a plurality of cylindrical lenses having different frequencies. At least one of a red filter / green filter, a prism, a cross cylinder lens, a polarizing plate, a Madox lens, and an auto cross cylinder lens is arranged on the auxiliary lens disks 123R and 123L. In addition, a cylindrical lens, a rotary prism, an auto-cross cylinder lens, and the like are arranged to be rotatable about the optical axis L1 or the optical axis L2 by the driving units 150R and 150L. The drive units 130R and 130L and the drive units 150R and 150L may be provided for each lens disk.

  The auto cross cylinder lens is a lens for performing a cross cylinder (auto cross) test. The cross cylinder test is a test for measuring the direction and frequency of astigmatism of the eye to be examined. For example, as shown in FIG. 4, the auto cross cylinder lens Ac is provided with two prism regions G1 and G2 for separating the field of view. The two prism regions G1 and G2 are separated with the axis L3 as a boundary, for example. In this case, for example, the field of view is separated in the direction perpendicular to the axis L3. Furthermore, the astigmatism power is given to each prism area, and the astigmatism axes are orthogonal to each other.

  Note that the optometry apparatus 100 may include, for example, a mechanism that adjusts the distance between the left and right lens units 110, a mechanism that adjusts the convergence angle (attack angle) of the left and right lens units 110, and the like. Further, the optometry apparatus 100 may include a forehead rest 170 that contacts the forehead of the subject. The forehead 170 has a role of holding the subject's head and fixing the position of the eye to be examined at a predetermined examination position.

  Note that the optometry apparatus 100 is not limited to the above-described configuration, and may be any configuration that can electrically switch an optical element disposed in front of the eye of the eye to be examined. For example, a configuration in which the power is switched by driving an electroactive lens may be used.

<Target presentation device>
The optotype presenting apparatus 200 includes an optotype presenting unit 210 that presents an examination target. The optotype presenting apparatus 200 is connected to the controller 300 via the relay unit 400, and switching of the optotype displayed on the optotype presenting unit 210 is performed by operating the controller 300 or the like.

  The optotype presenting apparatus 200 displays the test optotype on the optotype presenting unit 210 in accordance with an operation signal input from the controller 300. The optotype presenting apparatus 200 is located at substantially the same height as the optometry apparatus 100 and is installed so as to be separated from the optometry apparatus 100 by a distance suitable for the examination. In the present embodiment, the distance between the optometry apparatus 100 and the optotype presenting apparatus 200 is set to a distance (for example, 5 m) suitable for the distance examination. The target presentation device 200 is not limited to the illustrated display, and a chart projector that projects a target on a screen, a space-saving target projection device that projects a target through a concave mirror, and the like are used.

  As illustrated in FIG. 1, the optometry apparatus may include a near vision target presenting unit 104 for performing a near vision examination. The near vision target presenting unit 104 is slidably held by, for example, a rod 102 attached to the optometry apparatus. The near vision target presenting unit 104 includes, for example, a chart board on which a plurality of examination targets are drawn, a liquid crystal display, or the like.

<Controller>
A controller 300 shown in FIG. 1 operates at least one of the optometry apparatus 100 and the optotype presenting apparatus 200. The controller 300 includes an operation panel 310 on which a plurality of operation buttons are arranged and a display panel 320 having a touch panel function, and detects an operator's operation on the operation panel 310 and the display panel 320. The controller 300 outputs a driving signal to the optometry apparatus 100 and the optotype presenting apparatus 200 based on the operation of the examiner. The controller 300 is used, for example, to instruct switching of optical elements arranged in front of the eyes.

  As shown in FIG. 5, the control unit 370 functions as an execution subject of the controller 300. The control unit 370 executes various processes according to a program for controlling the optometry apparatus 100 and the optotype presenting apparatus 200. Such a program is stored in the storage unit 340 provided in the controller 300, for example.

  Note that the control unit 370 that controls the optometry apparatus 100, the optotype presenting apparatus 200, and the like is not limited to the controller 300, and may be included in the optometric apparatus 100, the optotype presenting apparatus 200, the relay unit 400, and the like.

<Relay unit>
A relay unit 400 shown in FIG. 1 is a unit that controls communication between the power source of the optometry apparatus 100 and the optometry apparatus 100 and the optotype presenting apparatus 200 from the controller 300. The relay unit 400 is connected to the controller 300, the optometry apparatus 100, and the optotype presenting apparatus 200. Connection is performed wirelessly or by wire. The relay unit 400 includes a control unit 200 (see FIG. 5) including a CPU or the like, receives a control command from the controller 300, and controls the optometry apparatus 100 and the target presentation apparatus 200. Note that the relay unit 400 is not necessarily indispensable, and may be configured such that the optometry apparatus 100 and the optotype presenting apparatus 200 receive a control command from the controller 300.

<Control action>
The operation of the apparatus configured as described above will be described (see the inspection procedure flowchart in FIG. 6). In the following description, an example will be given in which a non-measuring eye is clouded during one-eye measurement and an inspection is performed with both eyes released. In the examination performed with both eyes open, unnecessary adjustment of the eye to be examined is less likely to occur than in the case of shielding with a shielding plate, and it is easy to perform an appropriate examination. When carrying out the cloud fogging, the examiner sets the cloud parameter for determining the cloud amount before the inspection. Examples of the cloud parameter include a target visual acuity value at the time of cloud fog. For example, the control unit 370 displays a visual acuity value setting screen 360 as shown in FIG. 7 on the display unit 320, and receives an input of a target visual acuity value from the examiner. For example, selection buttons 361 and 362, a setting button 363, and the like are displayed on the visual acuity value setting screen 360. In this case, the examiner may select the target visual acuity value at the time of cloudy fog by operating the selection button 361 or the selection button 362, and may input the target visual acuity value being selected by pressing the setting button 363. The control unit 370 receives an input of the target visual acuity value and stores it in the storage unit 340 or the like (step S1). It is not necessary to set the target visual acuity value every time for each examination. For example, once the setting is made on the setting screen, the same target visual acuity value is used for subsequent examinations.

  After setting the target visual acuity value, the examiner starts examining the eye to be examined. In the present embodiment, a preliminary inspection is performed before subjective refractive power measurement (step S2). The preliminary examination includes, for example, objective measurement by the eye refractive power measurement apparatus 600 (see FIG. 5), anterior spectacle measurement, one eye cover test, alternate cover test, naked eye / anterior spectacle visual acuity check, and balance by polarization RG (red green). For example, testing, visual acuity measurement with objective values. When the subject wears spectacles, the power of the spectacle lens (spectacle value data) may be measured by the lens meter 700, and the result may be used as information for prescription. Each measurement data can be input to the controller 300. For example, the measurement data is stored in the storage unit 340 or the like. The controller 300 may receive measurement results of the eye refractive power measurement apparatus 600 and the lens meter 700 by wireless or wired communication means, or may be input by an examiner.

  In the optometry window 160 of the optometry apparatus 100, for example, an initial setting optical system is disposed. At this time, when the objective value data inputted in advance or the previous spectacle value data is called, the correction optical system based on the data is arranged in the left and right optometry windows 160, and the subjective examination can be performed efficiently. In the following description, it is assumed that the objective value data is used.

  When the lenses based on the objective value data are arranged in the left and right optometry windows 160, the examiner confirms whether the left and right eyes are properly viewed by, for example, polarization R / G examination. A polarization R / G inspection target is used as the inspection target. The polarization R / G inspection target displayed on the target presentation unit 210 has, for example, a right eye target and a left eye target whose polarization directions are orthogonal. For example, the polarization direction of the right-eye target is set to 135 °, and the polarization direction of the left-eye target is set to 45 °. In the left and right optometry windows, polarizing lenses provided on the auxiliary lens disks 123R and 123L are arranged with polarization axes corresponding to the left and right visual targets. The examiner checks, for example, whether the corresponding visual targets are visible on the left and right, and whether the left and right appearances are balanced. As a result, it is confirmed whether or not an inspection performed using cloud fog instead of shielding is appropriate for the subject. For example, in the polarization R / G inspection, when both the right eye target and the left eye target are not visible, it is not suitable for this inspection. Also, it is confirmed whether or not the initial value of the correction optical system is appropriate based on the objective value data. Thereafter, for example, the visual acuity value in both eyes is confirmed by visual acuity inspection. For example, the control unit 370 stores the visual acuity value obtained by the visual acuity test in the storage unit 340 or the like.

  If the visual acuity value with both eyes can be confirmed, the control unit 370 calculates the amount of fog for applying fog to the eye to be examined (step S3). For example, the control unit 370 calculates the cloud amount based on the visual acuity value of the subject stored in the storage unit 340 or the like in step S2 and the target visual acuity value input by the examiner before the examination.

For example, the control unit 370 may determine the cloud amount based on the tables shown in Tables 1 and 2 below. Table 1 shows the relationship between the target visual acuity value at the time of cloud fog and the spherical power A1 added for applying the cloud with the target visual acuity value from the state corrected by the auto-ref value (objective measurement value). Table 2 shows a correspondence relationship between the visual acuity value when the visual acuity is measured in a state corrected with the auto-ref value and the spherical power A2 corresponding to the degree of blurring when the visual target is viewed with the visual acuity value.

For example, the control unit 370 may obtain the cloud amount F by substituting numerical values corresponding to the visual acuity value and the cloud parameter of the subject into the following equation (1). Expression (1) is an expression for obtaining the cloud amount F by subtracting the magnitude of the spherical power A2 obtained by converting the degree of blurring in the state corrected with the auto-ref value from the spherical power A1 corresponding to the target visual acuity value.

  For example, when the target visual acuity value is input as 0.7 by the examiner, the control unit 370 applies cloud fog to such an extent that a visual target with visual acuity of 0.7 can be seen with the non-measuring eye. For example, the control unit 370 determines a spherical power A1 corresponding to a visual acuity value of 0.7 according to Table 1 and a spherical power A2 corresponding to a visual acuity value measured based on visual acuity according to Table 2, and substitutes it into Expression (1). Here, when the result of visual acuity measurement is visual acuity 0.9, since A1 = 0.75D and A2 = ± 0.25, F = 0.50 from the equation (1).

  As described above, when the visual acuity of the subject is small (for example, less than 1.0), the control unit 370 is already in a blurred state, so the spherical power A1 corresponding to the target visual acuity value at the time of cloud fog is set. On the other hand, the cloud amount F subtracted by the spherical power A2 is added to the non-measuring eye (see FIG. 8). That is, the control unit 370 determines the final cloud amount F by correcting the reference frequency with the correction frequency. In this embodiment, the spherical power A1 necessary for dropping the estimated visual acuity value (for example, 1.0 or more) estimated in the state corrected with the objective measurement value to the target visual acuity value is a reference. Then, the spherical power A2 for correction is determined based on the difference between the actual visual acuity value of the subject and the estimated visual acuity value in a state corrected with the objective measurement value.

  Of course, the calculation method of the fog amount F is not limited to the above example. For example, the control unit 370 may use the spherical power A1 necessary for obtaining the target visual acuity value as the fog amount F regardless of the visual acuity value at the auto reflex value. Further, not only spherical power but also cylindrical power may be added to add cloud fog.

  In addition, said Table 1 and Table 2 are examples, and a numerical value can be changed arbitrarily. Moreover, although the cloud amount was determined by Table 1 and Table 2, you may obtain | require the cloud amount by calculation by a conversion formula etc. without using a table | surface.

  The control unit 370 may add a certain amount of cloud fog. For example, the control unit 370 sets a fixed value (for example, 0.3) as the target visual acuity value at the time of cloud fog, and adds the amount of cloud fog so that the visual acuity value at the time of cloud fog becomes a set fixed value. Also good.

  Note that, when there is no input of the auto-ref value, the control unit 370 may calculate the cloud amount by assuming the visual acuity value in a state corrected by the auto-ref value. For example, the control unit 370 may calculate the cloud amount by setting the visual acuity value at the auto reflex value as 1.0. When the visual acuity value is 1.0, the spherical power A2 is 0D from Table 2, so the cloud amount F is the same as the spherical power A1 corresponding to the target visual acuity value.

  When the cloud amount is determined, the control unit 370 further adds the cloud amount (for example, plus spherical power) to the spherical power already arranged in the optometry window 160 before executing the examination using the cloud function. A command signal is sent to the optometry apparatus 100 so as to load it. For example, the control unit 370 drives and controls the spherical lens disk 121R or the spherical lens disk 121L, and adds the obtained cloud amount (step S4).

  Thus, the amount of fog is automatically set by the control unit 370, so that the examiner can save the trouble of manually operating the controller 300 to change the frequency of the lens disk 120. Moreover, since the amount of fog is set from the visual acuity value of the subject as compared with the case where the amount of fog is set to a predetermined amount (for example, +1.00 D), the cloud state desired by the examiner can be appropriately reproduced. For example, even in a state corrected with the objective measurement value, the subject may see a visual acuity of 1.0, or may only see a visual target with a visual acuity of 0.9. In this case, there is a difference in the appearance of the clouded non-measuring eye between when + 1.00D is applied in a state of visual acuity 1.0 and when + 1.00D is applied in a state of visual acuity 0.9. In other words, when + 1.00D is applied in a state where the visual acuity is 0.9, the image is more blurred than in the case where + 1.00D is applied in a state where the visual acuity is 1.0. Thus, by setting the cloud amount based on the visual acuity value, even if there is a difference in the visual acuity value, the cloud state desired by the examiner can be realized for any subject.

  A plurality of cloud parameters may be set by the examiner. For example, the examiner may input a first target visual acuity value, a second target visual acuity value, etc. as the cloud fog parameter. When a plurality of target visual acuity values are input as the cloud fog parameters, first, the cloud may be applied so as to be the first target visual acuity value, and then the visual target may be changed to be the second target visual acuity value.

  When cloud is applied to the eye to be examined, the process proceeds to one-eye measurement (step S5). For example, the examiner operates the controller 300 to release the cloud only for the measurement eye in a state where the subject's eyes are clouded to obtain the weakest power at which the highest visual acuity is obtained. Thereafter, R / G inspection and cross cylinder test (astigmatic axis inspection and astigmatism power inspection) for preventing overcorrection are performed, and the maximum visual acuity value of one eye is confirmed by visual acuity inspection.

<Cross cylinder test>
Next, an astigmatic power and an astigmatic axis one-eye examination using an autocross cylinder lens will be described. The examiner operates the controller 300 to display the point cloud chart on the optotype presenting apparatus 200. Then, the control unit 370 places the auto cross cylinder lens Ac in the optometry window 160 of the measurement eye and the eye to be measured. As described above, by disposing the auto cross cylinder lens Ac in the left and right optometry windows 160, even when the auto cross cylinder is used, a cross cylinder test with binocular release using cloud fog can be performed.

  For example, when the autocross cylinder lens is disposed only in the optometry window on the measurement eye side, as shown in FIG. 9A, two point cloud charts are seen on the measurement eye side due to the prism component of the autocross cylinder lens. As shown in FIG. 9 (b), the point cloud chart appears as one on the non-measuring eye side without being separated. In this case, the retinal images of the left and right eyes are not fused well, and, for example, the point cloud chart appears to be three (see FIG. 9C). For this reason, the subject does not know which point cloud chart is visually recognized by the measurement eye, and may not be able to perform an appropriate examination. Accordingly, by arranging the auto cross cylinder lens Ac in the left and right optometry windows 160 as described above and separating the point group charts on both the left and right, an appropriate cross cylinder test can be performed with both eyes open.

  For example, as shown in FIG. 10 (a), two point cloud charts are visible on the measurement eye side due to the prism component of the auto cross cylinder lens, and as shown in FIG. 10 (b), the auto cross cylinder is also shown on the non-measurement eye side. Two point cloud charts appear depending on the prism component of the lens. Therefore, as shown in FIG. 10C, the point cloud charts that can be seen by each of the measuring eye and the non-measuring eye are appropriately fused, and the cross cylinder test can be performed.

  At this time, the control unit 370 is arranged so that the directions of the axes L3 of the left and right auto-cross cylinder lenses Ac coincide. For example, the control unit 370 controls the angle of the axis L3 of the non-measurement eye-side auto cross cylinder lens in accordance with the angle of the axis L3 of the auto-cross cylinder lens on the measurement eye side. For example, in the case of FIG. 11, the control unit 370 determines the angle θ1 of the axis L3 of the autocross cylinder lens Ac disposed in the right optometry window 160R and the axis L3 of the autocross cylinder lens Ac disposed in the left optometry window 160L. The angle θ2 is matched. This is to make the separation direction coincide when the point group chart is separated into two by the prism of the auto cross cylinder lens. If the separation directions of the point cloud charts are matched with the left and right eyes, the left and right retinal images are fused well, and an appropriate examination can be performed with both eyes open. In addition, although demonstrated that the control part 370 controls the angles (theta) 1 and (theta) 2 of the axis | shaft L3 with respect to a perpendicular direction, it is not restricted to this. For example, the control unit 370 may control the relative angle of the axis L3 of the left and right autocross cylinder lenses.

  The examiner rotates the axis of the auto cross cylinder lens until the difference in the appearance of the two point group charts becomes small. At this time, the control unit 370 may rotate the auto cross cylinder lens disposed on the measurement eye side and the auto cross cylinder lens disposed on the non-measurement eye side in synchronization with each other. For example, the control unit 370 may control the rotation of the autocross cylinder lens on the non-measurement eye side in accordance with the rotation of the autocross cylinder lens on the measurement eye side. For example, in the case of FIG. 11, the controller 370 rotates the axis K3 of the axis L3 of the autocross cylinder lens Ac arranged in the right optometry window 160R and the axis L3 of the autocross cylinder lens Ac arranged in the left optometry window 160L. The rotation directions K2 of the two are matched. Further, the control unit 370 may match the rotation amounts, rotation speeds, and the like of the left and right auto-cross cylinder lenses Ac. As described above, the control unit 370 controls the driving units 150R and 150L so that at least one of the rotation amount, the rotation direction, the rotation speed, and the like is equal, for example, and the autocross cylinders on the measurement eye side and the non-measurement eye side Rotate the lens. As a result, even when the auto-cross cylinder lens is rotated, the separation directions of the point cloud charts observed by the left and right eyes are the same, and the retinal image is easily fused.

  When the adjustment of the astigmatism axis is completed, the astigmatism power is adjusted. For example, the examiner switches the cylindrical power by driving the cylindrical lens discs 122R and 122L until the difference in the appearance of the two point group charts becomes small.

  When the one-eye examination is completed for one eye, the control unit 370 switches the measurement eye to the other eye. In this case, the control unit 370 cancels the amount of cloud on the eye side to be measured from now on, and becomes a spherical power optical system by the R / G inspection performed earlier. On the other hand, the cloud amount calculated in the same manner as in step S4 is added to the non-measuring eye side.

  When the one-eye examination for each of the left and right ends, the control unit 370 proceeds to the next binocular balance examination (step S7). At this time, for example, the control unit 370 arranges the polarizing plates of the auxiliary lens disks 123R and 123L in the left and right optometry windows, and cancels the fog that has been applied to the non-measuring eyes. When the binocular balance inspection is completed, the process proceeds to measurement of a binocular perfect correction value (step S8). For example, the control unit 370 once fogs both eyes and measures the weakest frequency at which the highest visual acuity appears. When the binocular perfect correction value is obtained, the control unit 370 ends the examination.

  In the above description, it has been described that the inspection target presented by the target presentation device 200 can be confirmed by both the left and right eyes, but it is also possible to make the target visible only to the measuring eye using polarized light. Good. For example, the optotype presenting apparatus 210 may include a polarizing optical member and polarize the optotype light flux. Then, the examination target may be made visible only to the measurement eye by the polarizing optical element disposed in the optometry window. As described above, clouding may be applied to the non-measuring eye as described above even when the binocular open state inspection is performed using polarized light. Thereby, it is possible to suppress the influence on the examination of the measuring eye caused by the non-measuring eye.

<Display screen>
Subsequently, the display of the controller 300 of this embodiment will be described. FIG. 12 is a diagram illustrating an example of the display screen 321 of the controller 300. On the display screen 321, for example, a simulation image 323 indicating how the subject looks with both eyes is displayed.

  The simulated image 323 with both eyes may be, for example, an image showing how the eyes are viewed with both eyes when the subject views the examination target through the optometry window 160. For example, the simulation image 323 may be an image assuming that retinal images obtained by the left and right eyes are fused. When the retinal image is fused, a clearer image is often given priority in the left and right. For example, FIG. 13 (a) shows how the visual target looks with the left eye, FIG. 13 (b) shows how the visual target looks with the right eye, and FIG. 13 (c) shows how the visual target looks with both eyes. Show. As shown in FIG. 13, when the left eye looks blurred due to cloud fog and the right eye looks clear, the way the eyes look with both eyes gives priority to the right eye.

  Therefore, the control unit 370 simulates, with both eyes, how the left and right eyes look clearly based on information such as the left and right visual acuity values, left and right correction values, and the amount of fog of the subject. The image 323 may be displayed on the display unit 320. For example, in the present embodiment, when the non-measuring eye is clouded, the appearance with the measuring eye without the clouding may be displayed on the display unit 320 as the viewing with both eyes. In this case, the control unit 370 may cause the display unit 320 to display a clear test target image that can be seen with the measurement eye as the simulation image 323.

  Note that the control unit 370 may display a simulation image indicating how the left and right are viewed. For example, as illustrated in FIG. 12, the control unit 370 may cause the display unit 320 to display a simulation image 324 that shows how the right eye looks, a simulation image 325 that shows how the left eye looks, and the like. For example, when the non-measuring eye is clouded in the one-eye examination, the control unit 370 may display a blurred examination target image as a simulation image of the appearance on the non-measuring eye side. For example, the control unit 370 may display an image that has been subjected to blurring processing or the like according to the amount of fog. The image to be displayed as the simulation image may be stored in advance in the storage unit 340 or may be generated by the control unit 370.

  Note that the degree of blurring of the simulation images 323, 324, and 325 may be changed according to changes in the correction power, the amount of fog, and the like. For example, when the cloud amount is increased, the image may be changed to a more blurred image, and when the cloud amount is decreased, the image may be changed to a clearer image. Thus, the examiner can easily confirm the change in the appearance of the subject due to the change in the frequency.

  Note that the control unit 370 may display the visual target image 322 of the inspection visual target to be displayed on the visual target presenting unit 210. The examiner can grasp whether or not the visual target is clearly seen by the subject by comparing the visual target image 322 with another simulation image.

  As described above, it is possible to easily confirm how the subject looks by displaying on the display unit 320 the simulation image 323 showing how to see with both eyes. For example, in the related art, when the examination is performed with cloud fog, the examiner may actually look into the optometry apparatus 100 to confirm the appearance of the visual target. However, the appearance of the examiner and the appearance of the subject during measurement may be different due to the influence of the examiner's own binocular vision abnormality and the like. In this case, it is difficult for the examiner to imagine how the subject looks. Therefore, in this embodiment, instead of displaying the simulation image for each eye for each target eye, the display unit 320 displays an image assuming that the retinal images for the left and right eyes are fused. As a result, it became easy to imagine a common view with the subject. In addition, by displaying a simulation image showing how it looks, the examiner can perform an examination while imagining how the subject looks.

  Note that an image to be displayed as a simulation image when cloudy fog is applied may be subjected to blurring processing such as lowering the luminance or increasing the exposure value according to the correction power. The blurring process may be, for example, a process such as color change, mixing, color removal process, or brightness change. Further, an image photographed with optical blurring may be acquired.

  Note that the control unit 370 may display an eye diagram 326 on the display unit 320 as illustrated in FIG. 12, for example. The eye diagram 326 is a ray diagram representing how the target luminous flux is incident on, for example, the measurement eye and the non-measurement eye that is clouded. As enlarged in FIG. 14, the eye diagram 326 is depicted by a diagram of the eye to be examined and the lens. As shown in FIG. 14A, for example, a correction lens (for example, a concave lens) P1 is arranged on the measurement eye, and a state in which the target luminous flux forms an image on the retina is depicted. On the other hand, in addition to the correction lens P2, a cloud lens (for example, a convex lens) Q1 is arranged on the non-measuring eye, and the state in which the target luminous flux forms an image before the retina is depicted. Thus, by displaying the eye diagram 326 on the display unit 320, the examiner can easily assume the appearance of the subject. The cloud amount F may be displayed near the cloud lens Q1.

  Similar to the above simulation image, the eye figure 326 may also change the imaging position of the target luminous flux in accordance with the change of the lens power disposed in the optometry window 160. For example, when the amount of fog is increased, the control unit 370 further changes the display so that the cloud lens Q2 is further disposed in the non-measuring eye of the eye diagram 326, and the imaging position K of the target luminous flux moves forward. (See FIG. 14B). On the other hand, when the amount of fog is reduced, even if the display is changed so that the number of cloud lenses is reduced in the non-measuring eye of FIG. 326 and the imaging position K of the target speculation moves to the fundus side. Good. At this time, the display of the numerical value of the cloud amount F may be changed.

  In this way, by changing the display of the eye diagram 326 in accordance with the change in the amount of fog, it is possible to easily check the appearance of the subject according to the frequency change. Therefore, the examiner can easily confirm whether the degree of blurring of the appearance of the subject has increased or decreased by changing the frequency. In addition, the explanation of the examination to the subject can be easily understood.

  In this embodiment, the control unit 370 displays the inspection target 322, the binocular appearance simulation image 323, the right eye appearance simulation image 324, the left eye appearance simulation image 325, and the eye diagram on the display screen 321. 326 is displayed. The examiner can more easily imagine the appearance of the subject by confirming the relationship between at least one of these displays. However, the control unit 370 displays at least one of the inspection target 322, the binocular appearance simulation image 323, the right eye appearance simulation image 324, the left eye appearance simulation image 325, and the eye diagram 326. May be.

  In the above description, the simulation image 323, the eye diagram 326, and the like are displayed on the display unit 320 of the controller 300. However, the present invention is not limited to this. For example, a simulation image or an eye chart showing how it looks on a display terminal (for example, a tablet terminal, a smartphone, a notebook PC, a desktop PC, etc.) may be displayed. Thus, for example, even when the optometry apparatus 100 is not actually used, such as an operation course for the optometry apparatus 100, it is possible to easily explain to the student how to see the cloudy fog.

DESCRIPTION OF SYMBOLS 100 Optometrist device 110 Lens unit 200 Target presentation device 300 Controller 320 Display unit 340 Storage unit 370 Control unit

Claims (5)

An optometry apparatus for examining an eye to be examined,
A pair of left and right lens units arranged in the optical path of the target luminous flux projected onto the subject and changing the optical characteristics of the target luminous flux;
Control means for controlling the driving of the lens unit;
Acquisition means for acquiring a target visual acuity value at the time of cloud fog,
The control means determines an amount of fog for causing the eye to be fogged based on the target visual acuity value acquired by the acquisition means. The acquisition means further acquires a visual acuity value of the subject,
The optometry apparatus according to claim 1, wherein the control unit determines the cloud amount based on the target visual acuity value acquired by the acquisition unit and the visual acuity value of the subject.   The optometry apparatus according to claim 1, wherein the acquisition unit acquires the target visual acuity value based on an operation signal output from the operation unit in accordance with an operation of the examiner. An optometry apparatus for examining an eye to be examined,
A pair of left and right lens units arranged in the optical path of the target luminous flux projected onto the subject and changing the optical characteristics of the target luminous flux;
Control means for controlling the driving of the lens unit;
Obtaining means for obtaining a visual acuity value of the subject,
The optometry apparatus, wherein the control means corrects a cloud amount for making the eye to be fogged in accordance with the visual acuity value acquired by the acquisition means. An optometry program executed in an optometry apparatus for inspecting an eye to be examined, which is executed by a processor of the optometry apparatus,
An acquisition step of acquiring a target visual acuity value at the time of cloud fog and a visual acuity value of the eye to be examined;
A determination step for determining an amount of cloud to be added to cloud the eye to be examined based on the target visual acuity value and the measured visual acuity value;
Is executed by the optometry apparatus.