JP2014128314A - Face supporting device, refractor, and visual target presentation unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To present good visual targets when a refractor is retracted from an eye of a subject.SOLUTION: A face supporting device is configured to support a face of a subject in an examination of a visual function of an eye to be examined by using a visual target presentation unit for presenting visual targets to the eye to be examined. The face supporting device includes a first face supporting member for supporting the face of the subject to keep a position of the eye to be examined relative to the visual target presentation unit while a place in front of the eye to be examined is opened in order to support, and can support the face of the subject even when a refractor having a pair of right and left lens chamber units is retracted from the eye of the subject.

Description

  The present invention relates to a face support device, a refractor, and an optotype presenting unit for visual function inspection.

  A target plate, a light source such as a halogen lamp that illuminates the target plate, an oblique beam splitter and a concave mirror are arranged in the housing, and the target luminous flux of the target plate illuminated by the light source is converted into a beam splitter and a concave mirror. There is known an optotype presenting apparatus that guides light to a subject's eye via an eye and presents an inspection target (see Patent Document 1).

  In addition, the eyesight presenting device, a subjective eye refractive power measurement device having a pair of left and right lens chamber units, called a refractor or a phoropter and switching and arranging optical elements on the examination window, and an optometry table, There is known an optometry apparatus that inspects visual functions such as the eye refractive power (see Patent Document 2).

Japanese Patent Laid-Open No. 06-197867 JP 2006-101942 A

  Further, in addition to the conventional device, in an optometry apparatus that presents an examination target on an eye to be examined looking through an examination window, a concave surface arranged on a reference axis set for viewing the target in which the subject eye is presented in the front direction There has been a target presentation unit that includes a mirror and a display for displaying a target, and reflects the target luminous flux from the display by the concave mirror to present the target to the eye to be examined.

  In the above apparatus, when performing an examination with the front of the eye to be opened open, if the position of the eye to be examined moves remarkably, the possibility of seeing a distorted target around the optical lens (for example, a concave mirror) or the target There was a possibility that the target was missing along the route to the surface.

  In view of the above problems, the present invention provides a face support device, a refractor, and a target presentation unit that can present a good target even when the refractor is withdrawn from the eye of the subject. Let it be an issue.

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

(1) A face support device for supporting a face of a subject when the visual function of the eye to be examined is examined using a visual target presentation unit for presenting a visual target to the eye to be examined. A refractor having a pair of left and right lens chamber units, including a first face support member that supports the face of the subject in a state where the front of the eye to be examined is opened in order to hold the position of the eye examination with respect to the optotype presenting unit. However, the face of the subject can be supported even when the subject is withdrawn from the eyes of the subject.
(2) The refractor includes a pair of left and right lens chamber units that switch and arrange optical elements in the inspection window, and is movable between an inspection position and a retracted position by a holding arm having one end connected to the base. A refractor,
The first face support member is configured to perform the inspection of the eye using the refractor while the refractor is disposed at the inspection position, and the first face support member while the refractor is disposed at the retracted position. The face support device according to (1), which is commonly used when the eye is examined without being used.
(3) The optotype presenting unit includes an external cover that covers the optotype presenting unit, and a proximal end of the first connecting member is connected to the subject side of the external cover (1) to (1) to (3). The face support device according to any one of (2).
(4) The optotype presenting unit has an external cover that covers the optotype presenting unit, a base end of the first connecting member is connected to the subject side of the external cover, and the holding arm is When the refractor is held movably in the vertical direction and the refractor moves from the retracted position to the inspection position, the first connecting member extends to a position where it enters between the pair of left and right lens chamber units, (1) The face support device according to (2), wherein the face support member is disposed in front of the subject from the reflector.
(5) The face support device according to (2), wherein a base end of the first connecting member is connected to a holding arm for holding the refractor in a suspended state.
(6) A pair of left and right lens chamber units that switch and arrange optical elements in the inspection window, a holding unit that holds the pair of left and right lens chamber units, and the pair of left and right lens chamber units apart from the first face support member And a second face support member that supports the face of the subject to fix the position of the eye to be inspected by a holding arm having one end connected to a base. When performing an inspection using a refractor movable between a position and a retracted position, when using the second face support member and performing an inspection in a state where the front of the eye to be examined is opened without using the refractor The face support device according to (1), wherein the first face support member is used.
(7) The face support device according to (6), wherein one end is connected to the first face support member and the other end is connected to the optotype presenting unit, and is arranged at the inspection position. And a retracting means for retracting the first face support member from the reflector.
(8) The face support device according to (6), in which one end is connected to the first face support member and the other end is connectable to a holding arm that holds the refractor suspended, and the inspection position And a retracting means for retracting the first face support member from the refractor disposed on the face support device.
(9) The face support device according to any one of (2) and (6), wherein the optotype presenting unit is configured to suspend and hold the refractor and to fix one end of the holding arm. A face support device comprising a base, wherein the base end of the first connecting member is connected to the base.
(10) The optotype presenting unit has an external cover that covers the optotype presenting unit, a base end of the first connecting member is connected to the subject side of the external cover, and the retracting unit includes: When the refractor moves from the retracted position to the inspection position, the first connecting member is bent or slid from the use position upward, downward, rightward or leftward to slide the first face support member from the refractor. The face support according to any one of (6) and (7), wherein the first connecting member and the face support member can be returned to the use position when the refractor moves from the inspection position to the retracted position. apparatus.
(11) A target display device comprising: a display for displaying a target; and a concave mirror for reflecting the target luminous flux from the display to present the target to the eye to be examined. A target presentation unit including a face support device.
(12) An optotype presenting apparatus that presents an optotype at a near distance of the eye to be examined, the optotype presenting unit including the face support device of (1).
(13) The face support device according to (1) is a refractor used for face support, and a pair of left and right lens chamber units that switch and arrange optical elements in the inspection window, a distance between the pair of left and right lens chamber units, and convergence A holding unit that adjustably holds at least one of the corners, a control unit that controls the holding unit to control at least one of the interval between the lens chamber units and the convergence angle, and the front of the eye to be examined A holding arm movably held between the inspection position and the retracted position, the control unit controls the holding unit, and the holding arm causes the refractor to move between the inspection position and the retracted position. The pair of left and right lens chamber units is arranged so that a part of the first connecting member of the face support device of (1) can pass between the pair of left and right lens chamber units. The refractor is characterized by being able to widen the gap between

  ADVANTAGE OF THE INVENTION According to this invention, even if it is a case where a refractor is evacuated from a subject's eyes, a favorable visual target can be shown to a subject.

  Embodiments according to the present invention will be described below with reference to the drawings. 1-12 is a figure explaining the structure of the optometry apparatus based on this embodiment.

<Outline of optometry device>
An outline of an optometry apparatus according to an embodiment of the present invention will be described. An optometry apparatus 1 (see FIG. 1) according to the present embodiment includes an optotype presenting unit 3 and a refractor (a subjective eye refractive power measurement unit) 8. The optometry apparatus 1 uses the optotype presenting unit 3 to present the optotype to the eye to be inspected through the distance inspection optical path, and inspects the far vision function of the eye to be inspected. The refractor 8 has a pair of left and right lens chamber units 80 that switch and arrange optical elements (for example, correction lenses) in the inspection window 81. For example, the optometry apparatus 1 presents an examination target to the eye to be examined looking through the examination window 81 of the refractor 8 and examines the distance vision function of the eye to be examined.

  Further, the optometry apparatus 1 includes an optometry table (optometry table unit) 2 and a holder 10. The holder 10 holds the optotype presenting unit 3 and holds the refractor 8 so that the inspection window 81 is positioned at the same height as the reference axis L1. For example, the holder 10 holds the optotype presenting unit 3 on the optometry table unit 2.

  In addition, the optotype presenting unit 3 is not limited to the configuration held in the optometry table unit 2 by the holder 10. For example, the holder 10 has a wall-hanging type configuration, and the optotype presenting unit 3 is installed on the wall.

  The target presentation unit 3 (see FIG. 4) includes a concave mirror 50 and a display 45 that displays the target. The target presentation unit 3 reflects the target luminous flux emitted from the display 45 by the concave mirror 50 and optically presents the target at a predetermined distance inspection distance. For example, the optotype presenting unit 3 is arranged such that the normal direction to the screen of the display 45 is inclined with respect to the optical axis O1 (see FIG. 6) of the concave mirror 50, and the target luminous flux is optical axis O1 of the concave mirror 50. Incidently with respect to.

  For example, as the display 45 (see FIG. 4), an LCD (Liquid Crystal Display), an organic EL (Electro Luminescence), or the like is used.

  For example, the concave mirror 50 is disposed on the reference axis L1 in the front direction when the eye to be examined looks at the front. For example, the concave mirror 50 is housed in the housing 5.

  For example, the housing 5 has a presentation window (for example, a transparent panel 52) disposed on the front surface of the concave mirror 50 with the reference axis L1, and is disposed in the front direction of the refractor 8. The transparent panel 52 transmits the target luminous flux from the display 45, transmits the target luminous flux reflected by the concave mirror 50 again, and emits it outside the housing 5.

  With such a configuration, the visual target presenting unit 3 is configured to present the visual target without using a beam splitter that has a large light amount loss of the visual target light beam, so that the visual acuity can be obtained without using a display that emits a large amount of light. Inspection with sufficient brightness required for inspection can be performed accurately. Further, since the housing 5 does not have a beam splitter, the casing 5 can be thinned, and a more space-saving optometry apparatus can be realized.

  Hereinafter, each configuration will be specifically described. In the following description, the display 45, the transparent panel 52, the optical path switching unit 60, and the subjective eye refractive power measurement unit will be described in this order. The following configurations can be combined as appropriate and may be implemented as independent configurations.

<Display>
The display 45 is disposed outside the reference axis L1 outside the housing. Further, the display 45 is disposed outside a range of a predetermined viewing angle when the eye to be examined looks into the examination window 81 (see FIG. 1) of the refractor 8.

  For example, the display 45 (see FIG. 4) is disposed outside the housing 5, and is disposed at a position where the target light flux is directed from the display 45 to the concave mirror 50 via the transparent panel 52 from the outside of the housing 5. More specifically, for example, the display 45 is arranged around the refractor 8 and emits a target luminous flux toward the concave mirror 50 from the eye to be examined. Further, for example, the display 45 is disposed around the face support member 82 of the refractor 8 (see FIG. 1). Furthermore, for example, the display 45 is disposed above the face support member 82 of the refractor 8.

  Such a disposition of the display 45 (see FIG. 4) can ensure a wide field of view for the subject. When the subject observes the distance target within the housing 5 through the transparent panel 52, the subject does not see the display 45 that is an extra structure on the subject side from the protective panel 51. Thus, the subject does not gaze at the display 45, and the intervention of adjusting the eye to be examined by looking at a structure other than the visual target at the distance examination can be reduced. And a visual function test | inspection can be performed accurately.

  The display 45 may not be disposed outside the range of a predetermined viewing angle when looking through the inspection window 81 of the refractor 8 (see FIG. 1). For example, the display 45 (see FIG. 4) is disposed outside the housing 5 and is a position for directing the target luminous flux from the display 45 to the concave mirror 50 via the transparent panel 52 from the outside of the housing 5. Any configuration may be used as long as it is arranged near the person's forehead. As described above, when the display 45 is arranged near the subject's forehead, when the target luminous flux is emitted toward the concave mirror 50, the incident angle to the concave mirror 50 and the reflected light from the concave mirror 50 are reflected. The reflection angle is reduced. For this reason, distortion of the visual target can be reduced.

<Transparent panel>
The transparent panel 52 (see FIG. 4) provided in the housing 5 is disposed at an angle where the normal direction of the front surface of the transparent panel 52 is inclined with respect to the reference axis L1. The inclination angle of the transparent panel 52 is set so that the reflected light emitted from the display 45 and reflected by the front surface of the transparent panel 52 is directed away from the eye to be examined at a predetermined position.

  As a result, it is possible to alleviate the problem that hinders the subject's observation of the visual target due to the strong light of the display 45 reflected by the transparent panel 52 entering the eye. Further, the background light behind the subject and the disturbing light above the optometry apparatus 1 are reflected by the transparent panel 52 and enter the subject's eye, thereby hindering the subject's target observation. Can be reduced.

  For example, the casing 5 further includes a shielding member (shielding portion 53) disposed around the transparent panel 52 on the front side of the concave mirror 50, and the transparent panel 52 surrounded by the shielding portion 53 includes the eye to be examined. You may make it comprise the presentation window for observing a visual target inside the body 5. FIG. By providing the shielding part 53, the internal structure of the housing 5 becomes difficult to see. Of course, the presentation window may be configured by only the transparent panel 52 and not provided with the shielding portion 53.

  Further, for example, an upper shielding member (shielding cover 6) that covers the upper part of the optical path from the transparent panel 52 to the display 45 may be provided. For example, it is good also as a structure provided with the side shielding member (shielding cover 6) which covers the side of the optical path between the transparent panel 52 and the display 45. FIG. By providing such a configuration of the shielding member, there is an effect of suppressing disturbance light from a fluorescent lamp or the like from entering the optical member in the apparatus.

  In addition, in this embodiment, although the shielding cover 6 is the structure which combines an upper shielding member and a side shielding member, you may be comprised by a separate member, respectively. Moreover, it is good also as a structure which provides only one of an upper shielding member and a side shielding member of a present Example.

<Optical path switching means>
The optometry apparatus 1 includes an optical path switching unit that switches between the far-inspection optical path and the near-inspection optical path that guides the target luminous flux from the display 45 to the eye without passing through the reflection of the concave mirror 50. And an angle changing means for changing the tilt angle of the screen of the display 45 between the distance inspection and the near inspection.

  The angle changing means is substantially perpendicular to the reference axis L1 when the subject's eye sees the screen of the display 45 when the optical path switching means switches between the distance inspection optical path and the near inspection optical path. The tilt angle of the screen of the display 45 is changed so that it can be observed as a screen located at the position.

  For example, the optical path switching means has a reflection member (reflection mirror) 62 that can be inserted and removed between the eye to be examined and the concave mirror 50, and by inserting and removing the reflection member 62 between the eye to be examined and the concave mirror 50. A configuration of the optical path switching unit 60 that switches between the far-inspection inspection optical path and the near-inspection inspection optical path can be given. For example, examples of the reflecting member 62 include a plane mirror, a convex mirror, and a concave mirror. In this case, for example, when the angle changing means switches to the near-inspection optical path, the normal direction with respect to the screen of the display 45 substantially coincides with the direction of the axis of the reference axis L1 reflected by the reflecting member 62. As described above, the tilt angle of the screen of the display 45 is changed. Further, when switching to the far-inspection optical path, the display screen is tilted so that the normal direction to the screen of the display 45 and the direction of the axis of the reference axis L1 reflected by the concave mirror 50 substantially coincide. Change the angle.

  As described above, the optical path switching means inserts and removes the reflecting member that reflects the target luminous flux from the display and guides it to the eye to be inspected, or removes the display from the optical path between the eye to be inspected and the concave mirror. The optical path is switched by a configuration including moving means that moves to the optical path between the optometer and the concave mirror. This makes it easy to switch between the distance inspection optical path and the near inspection optical path. In addition, since the tilt angle of the display 45 is changed as the optical path is switched, even when the optical path is switched, a target with reduced distortion can be projected onto the eye to be examined. This makes it possible to present a target for accurate examination with a configuration using a display that displays the target.

  Further, as a modification example, for example, a configuration in which the optical path switching unit 60 includes a reflection member inclination angle changing unit for changing the inclination angle of the reflection member. In this case, the optical path switching means 60 moves the reflecting member 62 on the reference axis L1 in a state where the reflecting member 62 is inserted between the eye to be examined and the concave mirror 50, and the reflecting member inclination angle changing means The angle of inclination of the reflecting member 62 is changed to change the near inspection distance of the near inspection optical path. The angle changing means changes the tilt angle of the screen of the display 45 so that the normal direction with respect to the screen of the display 45 and the direction of the axis of the reference axis L1 reflected by the reflecting member 62 substantially coincide. . Thereby, not only the distance inspection and the near inspection, but also the intermediate distance inspection is possible.

<Conscious eye refractive power measurement unit>
The refractor 8 is moved between an inspection position in front of the eye to be inspected and a retracted position depending on whether or not it is used for visual function inspection.

  For example, the holder 10 (see FIG. 4) is provided with a holding means (for example, a holding arm 20). The holding means holds the refractor 8 so as to be movable between an inspection position in front of the eye to be examined and a retracted position.

  For example, the holder 10 includes a first holding member (support) 10a and a second holding member (upper support) 10b extending from the support 10a. The column 10a holds the housing 5 at a position away from the refractor 8 placed at the inspection position by a predetermined distance. The upper support column 10 b extends from the support column 10 a and extends from above the housing 5 to the subject side in order to hold the display 45. The holding means is connected to the upper column 10b.

  For example, the holding means for holding the refractor 8 so as to be movable between the inspection position and the retracted position includes a holding arm 20 and a support member (for example, a support column).

  For example, when the holding arm 20 is used as the holding means, a configuration in which the holding arm 20 is connected to the upper column 10b and can be turned around the connection position O can be given. The holding arm 20 supports the refractor 8 so as to be movable between the inspection position and the retracted position by rotating the holding arm 20. This leads to downsizing of the apparatus and further space saving.

  In the present embodiment, for example, the connection position O is better connected at a position shifted from the center axis C of the optometry apparatus 1 in the vertical direction with respect to the paper surface. Thus, by connecting the connection position O at a position shifted from the central axis C of the optometer 1, the refractor 8 can be moved within a smaller movable range. Thereby, when moving the refractor 8, since a movable range is small, possibility that it will contact an examiner decreases.

  When a support member is used, the support member is a support member provided with vertical movement means (for example, a well-known telescopic pipe mechanism), and is attached to the upper column 10b. With the configuration in which the refractor 8 is moved to the retracted position above the inspection position, the refractor 8 can be moved between the inspection position and the retracted position. As a result, when the refractor 8 is moved, the refractor 8 does not cross the examiner's face, so that the possibility of contact with the examiner can be reduced.

  In addition, in this embodiment, although it was set as the structure by which the holding means connected with the reflector 8 was provided in the optotype presenting unit 3 via the holder 10, it is not limited to this. For example, the holding means may be connected to the optotype presenting means 3 without using the holder 10.

<Example>
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is an external view of an optometry apparatus according to the present invention. FIG. 2 is a schematic configuration diagram when the refractor 8 is viewed from the subject side. FIG. 3 shows a front view of the optometry apparatus 1 when the optometry apparatus 1 is observed from the X direction in FIG. The front view of the optometry apparatus in FIG. 3 shows the optometry apparatus 1 when a subjective eye refractive power measurement unit 8 (hereinafter referred to as a refractor 8) 8 is disposed at a retracted position (details will be described later). . FIG. 4 shows a cross-sectional view of the apparatus when the optometry apparatus 1 is cut along the plane AA of FIG. In FIG. 4, the refractor 8 is omitted.

  In FIG. 1, the optometry apparatus 1 includes an optometry table unit 2, an optotype presenting unit 3, and a refractor 8. The optometry table unit 2 includes a table 2a, a vertical drive unit 2b for moving the table 2a up and down, and a height adjustment switch 2c for inputting an instruction signal for moving the table 2a up and down. The vertical drive unit 2b includes a drive source such as a motor, and the drive source is driven by an instruction signal input from the switch 2c.

  The optotype presenting unit 3 (see FIG. 4) for presenting the optotype to the eye to be examined includes an optotype display unit 4 having a display 45 for displaying the optotype, a housing 5 in which a concave mirror 50 is housed, and an external appearance. A cover (shielding cover) 6 and an optical path switching unit 60 described later are provided. The optotype presenting unit 3 is held by a holder 10 having a support column erected on the table 2a. As an example of a preferable holding tool 10, the housing 5 is attached to and held by a first holding member (post) 10a erected on the end of the table 2a. The holder 10 extends from the support column 10a, and has a second holding member (upper support column) 10b extending from above the housing 5 to the subject side (the front side of the housing 5) in order to hold the display 45. The visual target display unit 4 is attached to the front portion of the upper column 10b.

  The refractor 8 is held by the holder 10 so as to be movable between the measurement position and the retracted position. As a preferred example, the refractor 8 is supported by the upper support column 10b via a holding member (for example, a holding arm) 20 so as to be movable between a measurement position and a retracted position. The optotype presenting unit 3, the optometry table unit 2, and the refractor 8 constitute an integrated optometry apparatus 1. However, the optometry apparatus 1 may be configured not to include the refractor 8.

  In FIG. 2, the reflector 8 is a pair of left and right lenses in which various optical elements (spherical lens, cylindrical lens, auxiliary lens, etc.) that give refractive power to the eye to be examined are switched and arranged on the left and right examination windows 81 by the drive unit 85. A chamber unit 80 is provided. The lens chamber unit 80 is held by a holding unit 84. The holding unit 84 includes a drive unit 86 that adjusts the distance between the left and right lens chamber units 80 in order to change the distance between the examination windows 81 in accordance with the distance between the pupils of the subject, and the convergence angle of the left and right lens chamber units 80 ( A moving means having a driving portion 87 for adjusting the striking angle) is provided inside. The refractor 8 includes a face support member 82 for bringing the eye to be examined into a predetermined positional relationship with respect to the examination window 81, and the face support member 82 is connected to the other end of the connecting member 83 whose one end is connected to the holding unit 84. Are concatenated. The face support member 82 is disposed between the lens chamber units 80 by the connecting member 83. As shown in FIG. 1, when the refractor 8 is located at the measurement position, the inspection window 81 (see FIG. 1) is at a height of a predetermined reference axis L <b> 1 where the target is presented by the concave mirror 50 (see FIG. 4). Is set to be located.

  The optotype presenting unit 3 (see FIG. 4) reflects the optotype light beam from the display 45 arranged outside the housing 5 by the concave mirror 50 and directs it toward the eye to be inspected. The target is presented at (for example, an inspection distance of 5 m). Further, the optotype presenting unit 3 inserts the reflecting mirror 62 between the concave mirror 50 and the eye to be examined, so that the target luminous flux from the display 45 is reflected by the reflecting member 62 and directed toward the eye to be examined. It is switched to a near vision target presenting unit that presents a visual target at a predetermined near vision inspection distance (for example, 40 cm). The optotype presenting unit 3 is configured to present the optotype without using a beam splitter with a large light loss of the target luminous flux. Therefore, the target presenting unit 3 is required for visual acuity inspection or the like without using a display that emits a large amount of light. Inspection with sufficient brightness can be performed accurately. Further, since the housing 5 does not have a beam splitter, the casing 5 can be thinned, and a more space-saving optometry apparatus can be realized.

<Target display section>
In FIG. 4, the optotype display unit 4 includes a support unit 41 and a display 45 that displays the optotype. The display 45 is supported by the support portion 41. The support portion 41 is held by the base 65 via a shaft (rotating shaft) 42 described later. The base 65 is supported by the holder 10. Thereby, the visual target display unit 4 is supported by the holder 10. An inspection target such as a Landolt ring target is displayed on the display 45. For example, as the display 45, an LCD (Liquid Crystal Display), an organic EL (Electro Luminescence), or the like is used. In the present embodiment, the following description will be given by taking the case where an LCD is used as the display 45 as an example.

  FIG. 5 shows a front view of the visual target display unit 4. The display 45 is supported by the support part 41, and a substrate of the display 45 not shown is disposed on the support part 41. A mask plate (cover) 49 (see FIG. 5) for covering a member such as a substrate is provided on the surface of the support portion 41. The mask plate 49 is disposed around the screen of the display 45 and has a function of preventing an extra object around the display 45 from being seen by the eye to be examined. The mask plate 49 is formed of, for example, an iron plate coated with black acrylic resin or black paint. Thereby, in addition to the screen of the target presented to the eye to be examined, the reflection of the board and the like around the display 45 is prevented. Moreover, by using the black mask plate 49, the background of the projected target can be made black, and the target can be easily confirmed. Of course, the mask plate 49 may not be black.

  FIG. 6 is a diagram for explaining the arrangement position of the display 45. The display 45 is disposed so as to be outside the range of the predetermined viewing angle α1 from the examination window 81 when the subject looks through the optometry window 81 of the refractor 8 and observes the visual target. That is, the viewing angle α1 is a viewing angle centered on the reference axis L1 when the subject's eye looks at the front through the examination window 81 of the refractor 8, and the examination window provided on the side farther than the subject's eye in the refractor 8. The size is determined by the size of the 81 openings. For example, the viewing angle α1 of the reflector 8 is set to 40 degrees around the reference axis L1. The vertical position of the reference axis L1 is substantially the same position as the measurement optical axis of the optometry window 81 of the refractor 8 (the optical axis of the spherical lens arranged in the optometry window 81). The left and right positions of the reference axis L1 are substantially the same positions as the left and right center positions of the left and right optometry windows 81. A concave mirror 50 is disposed on the reference axis L1 in the front direction of the eye to be examined placed at a predetermined position.

  The concave mirror 50 reflects the target luminous flux from the display 45 arranged outside the reference axis L1 toward the eye to be examined, so that the optical axis O1 of the concave mirror 50 (the normal direction of the curved surface of the concave mirror 50). Are arranged to be inclined with respect to the reference axis L1. A display 45 is arranged on the axis L2 which is the reflection axis of the reference axis L1 in the concave mirror 50. The tilt angle of the screen of the display 45 with respect to the reference axis L1 is set so that the axis (normal direction) perpendicular to the screen of the display 45 is the direction of the axis L2. Thereby, when the eye to be examined looks at the screen of the display 45 reflected by the concave mirror 50, the screen can be viewed as a screen positioned perpendicular to the reference axis L1.

  In the present embodiment, the vertical position of the display 45 is disposed outside the range of the viewing angle α1 and as close as possible to the reference axis L1. For example, the display 45 is disposed near the subject's forehead above the examination window 81, and emits a target luminous flux toward the concave mirror 50 from the subject's eye side. The arrangement position of the display 45 in the left-right direction is the center position when the subject faces the concave mirror 50.

  In the present embodiment, the inclination angle of the optical axis O1 of the concave mirror 50 with respect to the reference axis L1 is 5 °. In other words, the target luminous flux emitted from the display 45 is reflected by the concave mirror 50, and the reflection angle when guided to the eye to be examined is 5 °. The inclination angle of the axis L2 of the display 45 with respect to the optical axis O1 is 5 °. That is, the incident angle when the target luminous flux emitted from the display 45 enters the concave mirror 50 is 5 °.

  The tilt angle of the display 45 and the tilt angle of the concave mirror 50 are set so as to have the above configuration. By setting it as such a structure, generation | occurrence | production of the distortion of the optotype presented to a to-be-examined eye can be suppressed. In the present embodiment, as described above, the display 45 is arranged near the subject's forehead, so that when the target luminous flux is emitted toward the concave mirror 50, the incident light enters the concave mirror 50. The angle of reflection at the time of reflection from the corner and the concave mirror 50 is reduced. For this reason, distortion of the visual target can be reduced. In this way, with the configuration using the display that displays the target, the target can be presented to perform an accurate examination while saving space.

  In this embodiment, the incident angle is 5 ° and the reflection angle is 5 °, but the present invention is not limited to this. What is necessary is just to comprise by the incident angle and reflection angle with little generation | occurrence | production of the distortion of a target.

  In the present embodiment, a slight shielding wall 69 is provided below the display 45. Thereby, for example, the light beam incident on the eye to be examined can be efficiently removed directly from the display 45 when the apparatus is used in a dark room or the like. In the present embodiment, the shielding wall 69 is configured as a part of the shielding cover 6. The shielding cover 6 protrudes below the display 45 and serves as a shielding wall 69.

  With such an arrangement of the display 45, a wide field of view can be secured for the subject. When the subject observes the distance target in the housing 5 through the target display window (transparent panel 52), an extra structure is provided on the subject side from the protective panel 51 (see FIG. 4). The display 45 is no longer seen. Thus, the subject does not gaze at the display 45, and the intervention of adjusting the eye to be examined by looking at a structure other than the visual target at the distance examination can be reduced. And a visual function test | inspection can be performed accurately.

  The viewing angle of the inspection window 81 of this embodiment is about 40 °, but is not limited to this. In the case of using different types of refractors 8, the sizes and shapes of the inspection windows 81 are various, and the viewing angles from the inspection windows 81 of the different types of the refractors 8 are different. The viewing angle also changes depending on the distance from the eye to be examined to the examination window 81 of the refractor 8. Therefore, it is better to finely adjust the arrangement position of the display 45 according to the viewing angle. In the present embodiment, the distance from the eye to be examined to the examination window 81 of the refractor 8 is made constant by applying the forehead of the subject to the face support member 82.

<Optical path switching unit>
The optical path switching unit 60 (see FIG. 11) includes a support portion 61, a reflection mirror (for example, a plane mirror) 62, and a knob 63. The optical path switching unit 60 switches between the optical path for the distance inspection and the optical path for the near inspection by a configuration in which the reflection mirror 61 is inserted into and removed from the reference axis L1 when the subject's eye looks at the front (details will be described later). ).

<Housing>
FIG. 7 shows a schematic configuration diagram of the housing 5. Fig.7 (a) is a figure explaining the optical arrangement | positioning of each member. FIG. 7B is a diagram for explaining surface reflection by the protective cover 51. The housing 5 is a case that houses the concave mirror 50. The housing 5 has a protective panel 51 disposed on the front side (reflection surface side) of the concave mirror 50. The protective panel 51 includes a transparent panel 52 made of a transparent member such as an acrylic resin or a glass plate, and a shielding part 53 disposed around the transparent panel 52. The transparent panel 52 passes the target light beam from the target display unit 4 (display 45) disposed outside the housing 5 and passes the target light beam reflected by the concave mirror 50, so that the housing 5 To the outside (take out).

  Note that the housing 5 is not limited to a housing case. The casing 5 only needs to have a configuration in which at least the reflecting surface of the concave mirror 50 is protected from dust and external contact, and may not have a case-like configuration. For example, a housing that does not cover a part of the concave mirror 50 may be used. In this case, a configuration in which the back surface of the concave mirror 50 is not covered is mentioned. The concave mirror 50 is held by a housing at least at any position around the concave mirror 50, and a protective panel is disposed on the front side of the concave mirror 50. Moreover, the structure by which the housing 5 is comprised by the holder 10 may be sufficient.

  The transparent panel 52 serves as a visual target presentation window when the subject observes the visual target inside the housing 5. The subject sees the target in the center through the transparent panel 52 of the target window. As for the shielding part 53, the black coating and the black filter are affixed on the back surface (inside the housing) side, for example. Moreover, the inside of the housing 5 is painted black so that the internal structure is difficult to see. The casing 5 having the protection panel 51 protects the concave mirror 50 configured with high accuracy from being attached with dust or being damaged. The concave mirror 50 is disposed on the reference axis L1 when the eye to be examined looks at the front. The concave mirror 50 is arranged such that the optical axis O1 of the concave mirror is inclined with respect to the reference axis L1, and the focal length is designed so that the optical distance between the display 45 and the eye to be examined is 5 m. .

  Here, the transparent panel 52 is arranged so as to be inclined so that the inclination angle θ of the normal line (normal direction) L3 of the transparent panel 52 surface with respect to the reference axis L1 becomes a predetermined angle (for example, 10 ° or more). ing. The angle θ is set to an angle such that when the light from the visual target display unit 4 (display 45) is reflected by the surface of the transparent panel 52, the reflected light goes in a direction away from the eye to be examined. In particular, since the display 45 emits strong light, when the light of the display 45 reflected by the transparent panel 52 enters the eye to be examined, the reflected light hinders target observation presented via the concave mirror 50. Further, when the disturbance light in the background behind the subject and the disturbance light above the apparatus 1 are reflected by the transparent panel 52 and enter the eye to be examined, the subject's target observation is hindered. In this device, these problems can be reduced by setting the angle θ as described above, and the target is presented to perform an accurate inspection while saving space in a configuration using a display that displays the target. Can be done.

<Shielding cover>
Further, the shielding cover 6 is an upper support column of the holder 10 in order to suppress the incidence of disturbance light on the optical members (the display 45, the reflection mirror 62, the protective panel 51, and the concave mirror 50) of the optotype presenting unit 3. 10b is disposed at an upper position and a lateral position. The shielding cover 6 covers the upper side of the apparatus and the side above the reference axis L1, and thereby has an effect of suppressing disturbance light from a fluorescent lamp or the like from entering the optical member in the apparatus.

<Face support member>
The face support member 31 (see FIGS. 3 and 4) is disposed on the subject side of the shielding cover 6 via a connecting member 32. One end of the connecting member 32 is connected to the shielding cover 6, and the other end of the connecting member 32 is connected to the face support member 31.

  The face support member 31 supports the subject's face and can fix the position of the subject's eye with respect to the target presentation unit 3. The face support member 31 can support the face of the subject even when, for example, the refractor 8 is retracted from the front of the subject and the front of the subject's eye is opened.

  The face support member 31 may be a forehead or a chin rest. However, the face support member 31 is not limited to this, and supports at least one point above the subject's neck (for example, the head) to provide a target presentation unit. It is only necessary that the position of the eye to be examined can be fixed with respect to 3. In the present embodiment, the face support member 31 will be described as supporting the forehead.

  The retracting means (retracting mechanism) 33 can retract the face support member 31 upward with respect to the use position. For example, when the refractor 8 is moved from the retracted position to the inspection position, the examiner retracts the face support member 31 using the retracting means 33.

  The retracting means 33 is provided on the shielding cover 6, for example, and can retract the face support member 31 by moving the connecting member 32 upward. The face support member 31 in FIG. 4A is shown before retraction, and the face support member 31 in FIG. 4B is shown after retraction. The retracting means 33 has a rotation axis in the horizontal direction, and can bend the connecting member 32 in a direction parallel to the vertical direction (use position) with respect to the surface of the shielding cover 6.

<Movement mechanism of the subjective eye refractive power measurement unit>
The refractor 8 (see FIG. 1) is supported by the holder 10 (see FIG. 4) by the holding arm 20. The position where the refractor 8 is supported may be, for example, on the central axis of the surface formed by the inspection window 81 and above the central axis. Of course, the position supported by the holding arm 20 is not limited to the above-described position. The refractor 8 may be configured to be supported by the holding arm at any position of the refractor 8.

  The holding arm 20 is connected to the holding tool 10 so as to be rotatable (rotatable). Accordingly, the refractor 8 supported by the holding arm 20 is configured to be rotatable with respect to the holding tool 10. The examiner places the refractor 8 at the examination position in front of the eye to be examined. The subject places the subject's eye at a fixed position by aligning the forehead with the face support member 82 of the refractor 8. In this state, the visual target is observed through the optometry window 81 of the refractor 8 to examine the visual function.

  The refractor 8 is configured to be rotatable with respect to the holder 10 by a holding arm 20. FIG. 8 is a diagram for explaining the moving means of the refractor 8. FIG. 8A shows a front view of the apparatus when the refractor 8 is arranged at the inspection position (measurement position), and a plan view when the apparatus is viewed from the F direction. FIG. 8B shows a front view of the apparatus when the refractor 8 is disposed at the retracted position, and a plan view when the apparatus is viewed from the F direction.

  When the refractor 8 is moved between the inspection position and the retracted position, the refractor 8 is rotated on an arc around the connection position O between the holding arm 20 and the holding tool 10. That is, by rotating the refractor 8 around the connecting position O of the holding arm, the refractor 8 is moved between the inspection position and the retracted position with respect to the reference axis L1 (concave mirror 50). .

  Here, for example, when the connection position O is located on the central axis C, when the refractor 8 is moved, the refractor 8 and the shielding cover 6 or the holding tool 10 are not interfered with the shielding cover 6 or the holding tool 10. It is necessary to lengthen the distance. In other words, in order to avoid interference, it is necessary to increase the movable range when the arc is moved, and therefore the length W of the holding arm 20 must be made longer.

  In the present embodiment, in the plan view of FIG. 7, the connection position O is connected at a position shifted in the vertical direction with respect to the paper surface from the center axis C of the apparatus. Thus, by connecting the connection position O at a position shifted from the central axis C of the apparatus, the refractor 8 can be moved within a smaller movable range. That is, even if the length W of the holding arm is shortened and the movable range of the refractor 8 is reduced, interference with the shielding cover 6 and the holding tool 10 does not occur.

  For example, in the plan view, when the connecting position O is positioned above the central axis C (leftward with respect to the paper surface of the front view), when the refractor 8 is moved to the left of the eye to be examined, The movable range of rotational movement is reduced. Further, in the plan view, when the connection position O is positioned below the central axis C (rightward with respect to the paper surface of the front view), when the refractor 8 is moved to the right of the eye to be examined, The movable range of rotational movement is reduced.

  As described above, the refractor 8 can be retracted within a smaller movable range by integrally connecting the refractor 8 to the optotype presenting unit 3 and shifting the connecting position O from the central axis C of the apparatus. This leads to downsizing of the apparatus and further space saving. Moreover, when moving the refractor 8, since the movable range is small, the possibility of contact with the examiner is reduced.

  In this embodiment, the holding arm 20 connected to the upper support column 10b can be rotated (turned) around the connection position, and the refractor 8 is moved into the inspection position and the retracted position by the rotation movement of the holding arm 20. However, the present invention is not limited to this. It is good also as a structure which attaches an up-and-down moving means to the upper support | pillar 10b of the holder 10, and moves the refractor 8 to the retracted position above an inspection position (refer FIG. 13). For example, the refractor 8 is connected to the holder 10 so as to be extendable and contractable by a known telescopic pipe mechanism. Then, the refractor 8 is retracted by moving the refractor 8 in the vertical direction. As a result, when the refractor 8 is moved, the refractor 8 does not cross the examiner's face, so that the possibility of contact with the examiner can be reduced. In addition, when the refractor 8 is retracted by moving up and down, it is better to prevent the refractor 8 from entering the visual field of the eye to be examined.

  In addition, the refractor 8 may be configured to move up and down with respect to the holding arm 20 so that the refractor 8 can be moved up and down. Of course, the retracting means may be configured by combining the vertical movement and the rotational movement.

<Control unit>
FIG. 9 is a control block diagram of the optometry apparatus. The control unit 70 is connected to the reflector 8, the display 45, the controller 90, the memory 72, and the like. The memory 72 stores a lot of inspection target data such as Landolt's target. For example, visual target data having a visual acuity value of 0.1 to 2.0 is stored. In response to an input signal from the controller 90, the control unit 70 calls the corresponding target data from the memory 72, controls the display on the display 45, and displays the target on the screen of the display. In the present embodiment, the signal from the controller 90 is input to the control unit 70 via a cable (not shown), but the signal may be input by wireless communication such as infrared rays.

<Optical path switching>
This apparatus is provided with an optical path switching unit 60 for switching between a distance inspection optical path and a near inspection optical path in the target presentation of the target presentation unit 3. Hereinafter, optical path switching will be described. FIG. 10 is a diagram for explaining switching between the distance inspection optical path and the near inspection optical path. FIG. 10A shows an optical path for distance inspection. FIG. 10B shows a near-inspection optical path. In FIG. 10, the refractor 8 is omitted.

  When the visual function test is performed in the far-inspection optical path, the target light beam is emitted from the display 45 toward the concave mirror 50, and the target light beam reflected by the concave mirror 50 is presented to the eye to be examined. The subject observes the presented visual target and performs a visual function test for distance.

  When the visual function test is performed in the near test optical path, the reflection mirror 62 is disposed on the reference axis L1 between the eye to be examined and the concave mirror 50. In addition, the inclination angle of the screen of the display 45 is changed so that the normal direction with respect to the screen of the display 45 and the direction of the axis L4 where the reference axis L1 is reflected by the reflection mirror 62 substantially coincide.

  The target luminous flux emitted from the display 45 is guided to the eye to be examined along the reference axis L1 without passing through the concave mirror 50. The target light flux is guided to the eye to be examined without passing through the concave mirror 50, so that the examination distance becomes a short distance (for example, 40 cm).

  At the time of switching to the far-inspection optical path, the normal direction to the screen of the display 45 and the direction of the axis L2 of the reference axis L1 reflected by the concave mirror 50 substantially coincide with each other. Change the tilt angle.

  Hereinafter, an apparatus configuration for switching the optical path will be described. FIG. 11 is a diagram showing a schematic configuration diagram in the visual target display unit 4 and the optical path switching unit 60 portion. FIG. 11A shows the visual target display unit 4 and the optical path switching unit 60 in the optical path for distance inspection. FIG. 11B shows the visual target display unit 4 and the optical path switching unit 60 in the near inspection optical path.

  The optotype display unit 4 includes a shaft 42, a rotation limiting unit (projection 44 a, stopper 44 b) 44, a display 45, a projection 46, and a spring 47 as a configuration for changing the tilt angle of the display 45. Each member of the visual target display unit 4 is held by the base 65. The display 45 is connected to the shaft 42 via the support portion 41. The shaft 42 is held by the base 65 so as to be rotatable around its axis. Thereby, the inclination angle of the display 45 can be changed with respect to the holder 10.

  A spring 47 is connected to the shaft 42, and the shaft 42 receives an upward force due to the spring force of the spring 47. This spring force always acts as a force (a force that tilts the display 45) that rotates the shaft 42 in the B1 direction (see FIG. 10). At this time, the rotation amount is limited by the rotation limiting unit 44. That is, the tilt angle of the display 45 is limited by the rotation limiting unit 44 at a predetermined angle. The rotation limiting unit 44 includes a protrusion 44a and a stopper 44b. The protrusion 44 a is provided on the shaft 42. The stopper 44b is held by the base 65. When the shaft 42 rotates by a predetermined amount, the projection 44a provided on the shaft 42 is fitted into the stopper 44b, and the rotation of the shaft 42 is stopped. As a result, the display 45 can be changed to a predetermined tilt angle (LCD tilt angle for near-field inspection) (see FIGS. 11A and 11B). When performing the distance inspection, the protrusion 46 provided on the support 41 of the display 45 is pressed in the B2 direction by the support 61 of the reflection mirror 62, and the change in the tilt angle of the display 45 is suppressed. (See FIG. 11A).

  The optical path switching unit 60 includes a support part 61, a reflection mirror (for example, a plane mirror) 62, a knob 63, a shaft (rotation shaft) 66, a rotation restriction part (projection part 67 a, stopper 67 b) 67, and a magnet 68. Each member of the optical path switching unit 60 is supported by the holder 10 through the base 65 in the same manner as the target display unit 4.

  The reflection mirror 62 is connected to the shaft 66 through the support portion 61. The shaft 66 is held by the base 65 so as to be rotatable around its axis. Thereby, the inclination angle of the support portion 61 can be changed with respect to the holder 10, and the reflection mirror 62 can be inserted into and removed from the optical path L1. At this time, the change amount of the tilt angle is limited by the rotation limiting unit 67 (projection 67a, stopper 67b) in the same manner as the target display unit 4. That is, the insertion position of the reflection mirror 62 is set by the rotation limiting unit 67.

  Further, a knob 63 is connected to the reflection mirror 62, and the examiner operates the knob 63 to insert / remove the reflection mirror 62. During the distance inspection, the reflection mirror 62 is held at the retracted position retracted from the optical path of the target display unit 4 by the magnetic force of the magnet 68 (see FIG. 11A). The magnetic force generated by the magnet 68 is stronger than the spring force of the spring 47 for changing the tilt angle of the display 45 of the target display unit 4. For this reason, the magnet 68 holds the reflection mirror 62 in the retracted position, presses the support portion 41 via the projection portion 46, and holds the display 45 at an inclination angle (arrangement position) during the distance inspection. Yes. When the knob 63 is operated by the examiner and the reflection mirror 62 is inserted, the magnetic force of the magnet 68 that has pressed the protrusion 46 is lost. Thus, the inclination angle of the display 45 with respect to the reference axis L1 is changed by the spring force of the spring 47 (see FIG. 11B). The inclination angle of the display 45 is such that when the subject's eye sees the screen of the display 45 reflected by the reflection mirror 62 in the direction of the reference axis L1, the screen (virtual image screen) is perpendicular to the reference axis L1. The angle is set so that it can be seen. When switching from the near inspection optical path to the far inspection optical path, the examiner lifts the knob 63 and moves the reflection mirror 62 to the retracted position.

  In this embodiment, the magnet 68 is used to hold the reflecting mirror 62 at the retracted position, but the present invention is not limited to this. Any configuration that can hold the reflecting mirror 62 at the retracted position may be used. For example, a configuration using a latch or the like may be used.

  As described above, switching between the far-inspection optical path and the near-inspection optical path can be easily performed. In addition, since the tilt angle of the display 45 is changed as the optical path is switched, even when the optical path is switched, a target with reduced distortion can be projected onto the eye to be examined. This makes it possible to present a target for accurate examination with a configuration using a display that displays the target.

  The operations of the face support device, the refractor, the optotype presenting device, and the optometry system according to the present embodiment will be described based on the visual acuity test procedure.

(Inspection using refractor)
First, the examiner performs a distance vision test on the subject with the power added by the refractor 8. Therefore, the examiner folds the face support member 31 upward by the retracting means 33 and retracts it. Thereafter, the examiner rotates the refractor 8 around the connection position O of the holding arm 20 and moves it from the retracted position to the inspection position (see FIG. 8). The examiner operates the controller 90 to send a signal to the control unit 70, and the control unit 70 controls the drive unit 85 to place a desired optical element in the inspection window 81 of the reflector 8. Further, the examiner operates the controller 90 to send an input signal to the control unit 70 to cause the target presentation unit 3 to present a desired distance inspection target.

  Next, the examiner instructs the subject to apply the forehead of the subject to the face support member 82. Thereby, a test subject's face is supported in the position where a subject can observe a distance target. The examiner confirms the appearance of the visual target to the examinee, and if the visual target can be identified, presents the visual target having a large visual acuity value by the operation of the controller 90, and presents the visual target having a small visual acuity value if it cannot be identified. To do. The examiner repeats this operation to measure the distance vision of the subject.

  When the distance vision test using the refractor 8 is completed, the examiner then performs a near vision test using the refractor 8. The examiner operates the controller 90 to send an input signal to the control unit 70 to cause the target presentation unit 3 to present a desired near-field inspection target. Further, the examiner operates the knob 63 to insert the reflection mirror 62 into the reference axis L1 and changes the angle of the display 45. Thereby, the visual target displayed on the display 45 is presented at the near distance of the subject by the reflection mirror 62.

  The examiner instructs the subject to again place the subject's forehead against the face support member 82 of the refractor 8. Thereby, a test subject's face is supported in the position where a subject can observe a near vision target. The examiner confirms the appearance of the visual target to the subject, and if the presented visual target can be identified, the visual target with a large visual acuity value is presented by the operation of the controller 90, and if the visual target is not identified, the visual target with a small visual acuity value is presented. Present. The examiner repeats this operation and measures the near vision of the subject.

(Inspection without refractor)
When the visual acuity test using the refractor 8 is completed, the examiner performs an inspection without using the refractor 8 next. In general, after performing inspection using the refractor 8, a temporary frame (trial frame) equipped with a trial lens is used and the inspection is performed in the same environment as when glasses are worn. In the temporary frame inspection, the refractor 8 is retracted. For this reason, the inspection is performed with the front open.

  First, the examiner rotates and moves the refractor 8 around the connection position O of the holding arm 20, moves the refractor 8 from the inspection position to the retracted position, and lowers the face support member 31 downward by the retracting means 33 to return to the use position (FIG. 8). reference). In addition, the examiner operates the controller 90 to send an input signal to the control unit 70 and presents a desired distance test target. Then, the examiner causes the subject to wear a temporary frame (trial frame) to which a desired trial lens is attached.

  The examiner instructs the subject to put the subject's forehead on the face support member 31 after having the subject wear the temporary frame. Thus, the face of the subject is supported at a position where the subject can observe the distance target. The examiner confirms the appearance of the visual target to the subject, and if the presented visual target can be identified, the visual target with a large visual acuity value is presented by the operation of the controller 90; Present a sign. The examiner repeats this operation to measure the distance vision of the subject.

  When the distance vision test without using the refractor 8 is completed, the examiner then performs a near vision test without using the refractor 8. The examiner operates the controller 90 to send an input signal to the control unit 70 to cause the target presentation unit 3 to present a desired near-field inspection target. Further, the examiner operates the knob 63 (see FIG. 11) to insert the reflection mirror 62 into the reference axis L1 and change the angle of the display 45. Thereby, the visual target displayed on the display 45 is presented at the near distance of the subject by the reflection mirror 62.

  The examiner again instructs the subject to apply the forehead of the subject to the face support member 31. Thus, the subject's face is supported at a position where the subject can observe the near vision target. The examiner confirms the appearance of the visual target to the subject, and if the presented visual target can be identified, the visual target with a large visual acuity value is presented by the operation of the controller 90, and if the visual target is not identified, the visual target with a small visual acuity value is presented. Present. The examiner repeats this operation and measures the near vision of the subject.

  In addition, although it demonstrated based on the procedure of the wear test | inspection using the temporary frame (trial frame) with which the trial lens was mounted | worn, it is also possible to test | inspect naked eye vision using the face support member 31. FIG. In the present embodiment, also in the naked eye inspection, the refractor 8 is retracted and the inspection is performed with the front open.

  Thus, by providing the configuration as in the present embodiment, the position of the eye to be examined can be fixed even when the examination is performed in a state where the front of the eye to be examined is opened, such as an examination without using the refractor 8.

  In addition, there is a method of increasing the curvature of the concave mirror when miniaturizing the device, but if the curvature is increased, the distortion of the peripheral part increases, the field of view is narrow, and the visual target image presented through the peripheral part of the concave mirror is reduced. Accuracy may be reduced. According to the face support device as described above, since the position of the eye to be examined can be fixed at a position where the target of the central part of the concave mirror can be reliably observed, the problem caused by increasing the curvature of the concave mirror is solved, As a result, the structure of the apparatus can be reduced in size. Of course, the application range of the present embodiment is not limited to a miniaturized apparatus.

  In the embodiment described above, a rotating mechanism having a rotating shaft in the horizontal direction is used as the retracting means 33, but the invention is not limited to the above configuration. For example, in the case of a rotation mechanism, the rotation axis may be in any direction as long as the face support member 31 can be bent at a position that does not interfere with the inspection using the refractor 8. Further, the retracting means may be configured to slide the face support member 31. For example, as shown in FIG. 12, a guide 34 having a guide direction in the vertical direction or the horizontal direction is provided in the shielding cover 6. The slider 33 is coupled to the coupling member 32 and is disposed so as to be movable along the guide 34.

  Thereby, the connecting member 32 is slid and the face support member 31 is retracted from the use position. The retracting means may be configured to retract the face support member 31 by driving a drive source, in addition to the structure of manually retracting the face support member 31.

Second Embodiment
A second embodiment of the present invention will be described with reference to the drawings. In the present embodiment, one face support member is used when the inspection is performed using the refractor 8 and when the inspection is performed in a state where the front of the eye to be examined is opened (the refractor 8 is disposed at the retracted position). Is different from the first embodiment in that it is shared. Hereinafter, the difference will be mainly described. In each of the following embodiments, the same reference numerals are used for portions that perform the same functions as those of the first embodiment described above, and repeated descriptions are omitted as appropriate.

<Refractor>
FIG. 13 shows the optometry apparatus 1 of this embodiment. The refractor 8 of this embodiment has a configuration in which the face support member 82 and the connecting member 83 are removed as compared to the first embodiment. When the inspection is performed using the refractor 8, the face support member 31 is also used. Since other configurations are the same as those of the first embodiment, description thereof is omitted.

<Holding arm>
The holding arm 20 is connected to the holding tool 10 as in the first embodiment. The vertical movement means (vertical movement unit) 21 is provided to hold the refractor 8 so as to be movable up and down. The vertical movement means 21 is provided at one end of the holding arm 20, for example.

  The vertical movement means 21 includes a guide member 22 and a support member 23. The guide member 22 extends in the vertical direction, for example, and guides the moving direction of the support member 23. The support member 23 supports the refractor 8 and is provided so as to be movable along the guide direction of the guide member 22.

  The vertical movement means 21 moves the refractor 8 up and down between the inspection position and the retracted position. The support member 23 is provided with a handle portion 24, and the handle portion 24 is provided with a vertical movement switch 25 connected to the control unit 70. The vertical movement means 21 includes a lock mechanism 26 that can lock the refractor 8 at the inspection position and the retracted position.

  When the vertical movement switch 25 is pressed and a signal is input, the control unit 70 first controls the drive units 86 and 87 of the holding unit 84 to adjust at least one of the interval between the left and right lens chamber units 80 and the convergence angle. This prevents the lens chamber unit 80 from coming into contact with the face support member 31, the connecting member 32, the holding arm 20, and the like. When the adjustment is completed, the lock mechanism 26 provided in the vertical movement means 21 is released by the control unit 70, and the refractor 8 can be moved up and down manually.

  Thus, the examiner can move the refractor 8 between the upper retreat position and the lower inspection position by holding the handle portion 24 and moving it up and down. The refractor 8 illustrated in FIG. 8A is disposed at the inspection position, and the refractor 8 illustrated in FIG. 8B is disposed at the retracted position. When the vertical movement switch 25 is released and no signal is input, the position is fixed by the electromagnetic brake of the lock mechanism 26 at the inspection position and the retracted position. Thereby, it can prevent that the lens chamber unit 80 contacts the face support member 31, the connection member 32, the holding arm 20, etc. FIG.

  The lock mechanism 26 is not limited to the configuration of the present embodiment, and may be any mechanism that can fix the vertical movement of the refractor 8. Even if it is not an electromagnetic brake, the structure which fixes the up-and-down movement of the refractor 8 mechanically may be sufficient.

  In the present embodiment, the sensor 28 connected to the control unit 70 can detect that the refractor 8 is disposed at the inspection position. When the movement of the refractor 8 from the retracted position to the inspection position is completed and the input of the signal by the vertical movement switch 25 is completed, the control unit 70 controls the holding unit 84 according to the detection signal from the sensor 28. The interval and the convergence angle between the left and right lens chamber units 80 can be adjusted to the initial values of the interval and the convergence angle stored in the memory 72.

  As will be described later, this is effective when the distance or the convergence angle between the left and right lens chamber units 80 is changed when the refractor 8 is moved from the inspection position to the retracted position. However, this adjustment is not limited to the initial value stored in the memory 72, but may be adjusted to the previous test state stored in the memory 72 or a value previously input by the inspector 90 using the controller 90. Good.

  Note that, as in the present embodiment, after the movement of the refractor 8 to the inspection position is completed, the interval and the convergence angle of the lens chamber unit 80 may not be automatically adjusted. Further, the vertically moving means 21 may be moved up and down by the examiner holding the handle portion 24 as in this embodiment, or may be automatically moved up and down by power supply driving.

<Face support member and connecting member>
The configuration of the face support member 31 and the connecting member 32 of this embodiment will be described. Compared with the first embodiment, the connecting member 32 of the present embodiment has a configuration in which the retracting means 33 is removed. This is because even when the inspection is performed using the refractor 8, the face support member 71 and the connecting member 72 need not be retracted because the face support member 31 is also used. Further, since the face support member 31 is used in a state where the refractor 8 is disposed at the inspection position, the connecting member 32 extends to a position where it enters between the left and right lens chamber units 80. The connecting member 32 arranges the face support member 31 on the subject side of the refractor 8.

  For example, an adjustment mechanism 27 for adjusting the face support member 31 in the front-rear direction of the subject may be provided. The adjustment mechanism 27 includes, for example, a dial mechanism, and moves the connecting member 32 in the front-rear direction. As the adjustment mechanism 27, a mechanism similar to the forehead adjustment mechanism provided in the refractor may be used. Thereby, when performing the test | inspection using the refractor 8, the distance of the to-be-tested eye and the optical element arrange | positioned at the test | inspection window 81 can be adjusted. Since other configurations are the same as those of the first embodiment, description thereof is omitted.

  Since the configuration other than the above-described reflector 8, holding arm 20, and connecting member 32 is the same as that of the first embodiment, the description thereof is omitted.

  Operations of the face support device, the refractor, the optotype presenting device, and the optometry system according to the present embodiment will be described based on the procedure of the visual acuity test.

(Inspection using refractor)
First, the examiner performs a distance vision test on the subject with the power added by the refractor 8. Therefore, the examiner moves the refractor 8 downward by the vertical movement means 21 of the holding arm 20 and moves it from the retracted position to the inspection position. At this time, the examiner holds the handle portion 24 while pressing the vertical movement switch 25.

  In the retractor 8 at the retracted position, the distance between the left and right lens chamber units 80 is widened so that the lens chamber unit 80 does not come into contact with the face support member 31, the face support member 32, or the holding arm 20 during the vertical movement, and the convergence angle is The state is 0 degree. For this reason, the control part 70 will cancel | release the locking mechanism 26 of the vertical movement means 21, if the input signal from the vertical movement switch 25 is received. The examiner holds the handle 24 and lowers the refractor 8 to the inspection position. At this time, the connecting member 32 passes between the left and right lens chamber units 80 without coming into contact with the refractor 8, and the face support member 31 is disposed at the use position.

  When the movement of the refractor 8 is completed, the examiner releases the up / down switch 25 and ends sending a signal to the control unit 70. Based on the operation signal from the vertical movement switch 25, the control unit 70 locks the vertical movement means 21 by the lock mechanism 26, and fixes the refractor 8 at the inspection position. Then, the control unit 70 controls the holding unit 84 so that the interval and the convergence angle between the left and right lens chamber units 80 are changed to the previous inspection state stored in the memory 72, the initial position stored in the memory 72, or The examiner adjusts it to a value input in advance by the controller 90.

  Thereafter, the examiner inspects the subject supported by the face support member 32 using the refractor 8. The inspection procedure is the same as that in the first embodiment, and a description thereof will be omitted.

(Inspection without refractor)
When the visual acuity inspection using the refractor 8 is completed, the examiner then performs an inspection without using the refractor 8. In general, after performing inspection using the refractor 8, a temporary frame (trial frame) equipped with a trial lens is used and the inspection is performed in the same environment as when glasses are worn.

  First, the examiner moves the refractor 8 upward using the vertical movement means 21 and moves the refractor 8 from the inspection position to the retracted position. At this time, the examiner pushes the vertical movement switch 25 and sends a signal to the control unit 70. The control unit 70 controls the drive units 86 and 87 of the holding unit 84 based on an operation signal from the up / down movement switch 25, so that the lens chamber unit 80 is connected to other members (for example, the face support member 31, the connecting member 32 or the like). The distance between the left and right lens chamber units 80 is increased or the convergence angle is rotated to a position of 0 degrees so as not to contact the holding arm 20).

  When the movement or rotation of the lens chamber unit 80 is completed, the control unit 70 releases the lock mechanism 26 of the vertical movement means 21. The examiner visually confirms that the movement or rotation of the lens chamber unit 80 is completed, holds the handle portion 24 while pressing the vertical movement switch 25, and lifts the refractor 8 to the retracted position.

  The connecting member 32 passes between the left and right lens chamber units 80 without contacting the refractor 8. When the movement of the refractor 8 is completed, the examiner releases the up / down switch 25 and ends sending a signal to the control unit 70. The control unit 70 locks the vertical movement means 21 by the lock mechanism 26 based on the operation signal from the vertical movement switch 25 and fixes the refractor 8 at the retracted position.

  Next, the examiner operates the controller 90 to send an input signal to the control unit 70 to cause the target presentation unit 3 to present a desired distance test target. Then, the examiner causes the subject to wear a temporary frame (trial frame) to which a desired trial lens is attached.

  The examiner puts a forehead on the face support member 31 with the subject wearing the temporary frame. Thereafter, the examiner performs a temporary frame inspection on the subject supported by the face support member 31. The inspection procedure is the same as that in the first embodiment, and a description thereof will be omitted.

  Thus, by providing the configuration as in the second embodiment, the position of the eye to be examined can be fixed even when the examination is performed in a state where the front of the eye to be examined is opened, such as an examination without using the refractor 8. In the present embodiment, one face support member 31 is shared between the case where the inspection is performed using the refractor 8 and the case where the inspection is performed in a state where the refractor 8 is disposed at the retracted position and the front of the eye to be examined is opened. it can.

  In the above description, the examiner has described that the movement or rotation of the lens chamber unit 80 is completed by visually observing the operation of the lens chamber unit 80. However, the present invention is not limited to this. You may provide the alerting | reporting means for notifying a subject that the operation | movement of the refractor 8 was completed. As the notification means, it is conceivable to sound a speaker or turn on a lamp when the operation is completed, but is not limited thereto. Thus, the examiner can easily confirm that the movement or rotation of the lens chamber unit 80 is completed.

  In the above description, when the examiner moves the refractor 8 from the inspection position to the retracted position, the control unit 70 controls the drive units 86 and 87 of the holding unit 84 so that the interval between the left and right lens chamber units 80 is increased. Although it is assumed that the angle of convergence is widened and the angle of convergence is rotated to a position of 0 degrees, the present invention is not limited to this. For example, when moving the refractor 8 to the retracted position, if the left and right lens chamber units 80 are at an interval and a convergence angle that do not contact the face support member 31, the connecting member 32, the holding arm 20, etc., the control unit 70 It is good also as a structure which cancels | releases the locking mechanism 26 of the up-and-down moving means 21 without controlling the drive parts 86 and 87. FIG. In this case, the holding unit 84 may be provided with detection means for detecting the drive amounts of the drive units 86 and 87. Further, the limit interval and angle of the left and right lens chamber units 80 that do not contact the face support member 31, the connecting member 32, the holding arm 20, or the like may be experimentally obtained and stored in the memory 72. The control unit 70 may control the driving of the driving units 86 and 87 by comparing these limit values with the driving amounts obtained by the detection means. Of course, a configuration may be adopted in which the distance between the members is detected by a sensor or the like connected to the control unit 70 and the drive units 86 and 87 are controlled so as to prevent contact.

  Moreover, in the above description, although the connection member 32 shall be connected with the subject side of the shielding cover 6, you may connect so that removal is possible. For example, attachment means (attachment part) for attaching the connecting member 32 to the shielding cover 6 is provided. When the connecting member 32 is attached to the shielding cover 6 via the attachment means, the face support member 31 is provided on the shielding cover 6. On the other hand, when the connecting member 32 is removed from the attachment means, the face support member 31 is removed from the shielding cover 6.

  As the attaching means, for example, a recess capable of fitting the connecting member 32 and a screw mechanism coupled to the connecting member 32 are conceivable. In the case of the screw mechanism, for example, a male screw portion is formed on the connecting member 32 and a female screw portion is formed on the shielding cover 6. In addition, it is not limited to the said structure, What is necessary is just a structure which can be connected so that removal is possible. The connecting member 32 may be provided with an attachment member such as a magnet or a suction cup as attachment means, and the connection member 32 may be attached to the shielding cover 6 via the attachment member.

<Third Embodiment>
A third embodiment of the face support device according to the present invention will be described with reference to the drawings. 14 and 15 are schematic configuration diagrams showing the optometry apparatus 1 of the present embodiment. In the present embodiment, one end of the holding arm 20 is fixed to the base 139. The refractor 8 is connected to the other end of the holding arm 20. The face support device according to the present invention is different from the first embodiment in that it is connected to the holding arm 20. Hereinafter, the difference will be mainly described.

<Refractor>
The refractor 8 of this embodiment is held on the other end side of the holding arm 20 whose one end is connected to the base 139. The base 139 is used as a basis for fixing one end of the holding arm 20 and supporting the weight of the refractor 8, for example. Examples of the base 139 include a table, a floor, and a wall. Further, the refractor 8 of this embodiment has a configuration in which the face support member 82 and the connecting member 83 are removed as compared with the first embodiment. Since other configurations are the same as those of the first embodiment, description thereof is omitted.

<Target presentation unit>
FIG. 14B is a schematic diagram showing the optotype presenting unit 140 of the present embodiment. In the target presentation unit 140 of the present embodiment, a target plate 142, a light source 143 such as a halogen lamp that illuminates the target plate 142, an obliquely arranged beam splitter 144, and a concave mirror 145 are arranged in a housing 141. The target luminous flux of the target plate 142 illuminated by the light source 143 is guided to the eye to be examined through the beam splitter 144 and the concave mirror 145 to present an examination target. The optotype presenting unit 140 is arranged on the back side of the reflector 8 arranged in the front direction of the subject.

<Holding arm>
As described above, the holding arm 20 of the present embodiment is different in the connection location. One end of the holding arm 20 is connected to the base 139 and the other end is connected to the refractor 8. The holding arm 20 is provided with a moving means (moving mechanism) 138 as in the first embodiment. The moving means 138 supports the refractor 8 so as to be movable between the inspection position and the retracted position. The moving means 138 of the present embodiment moves the refractor 8 in the left-right direction along the holding arm 20 and switches between the inspection position and the retracted position (see FIG. 15). The moving means 138 is not limited to the configuration of the present embodiment.

<Face support member and connecting member>
The connection member 32 of this embodiment differs in a connection location compared with 1st Embodiment. One end of the connecting member 32 is connected to the face support member 31, and the other end is connected to the holding arm 20. In the present embodiment, the holding arm 20 is connected to the other end side with respect to one end on the base 139 side. The face support member 31 is disposed in front of the subject from the reflector 8 by a connecting member 32 extending in the vertical direction. Compared to the first embodiment, the connecting member 32 has a configuration in which the retracting means 33 is removed. This is because even when the inspection is performed using the refractor 8, the face support member 31 and the connecting member 32 need not be retracted because the face support member 31 is also used. Since other configurations are the same as those of the first embodiment, description thereof is omitted. It should be noted that an adjustment mechanism capable of moving the face support member 31 in the front-rear direction of the subject is provided, and the position of the eye to be examined and the optical element disposed in the examination window 81 is adjusted when the examination is performed using the refractor 8. It should be possible.

  Since the configuration other than the above-described reflector 8, holding arm 20, and connecting member 32 is the same as that of the first embodiment, the description thereof is omitted.

(Inspection using refractor)
Since the examiner uses the refractor 8 to inspect, the refractor 8 at the retracted position is moved in the left-right direction by the moving means 138 and moved to the inspection position. At this time, the examiner may manually move the handle unit (not shown) provided in the refractor 8, or send a signal to the control unit 70 by operating the controller 90, and the control unit 70 is provided in the moving means 138. The drive unit may be controlled to move the refractor 8. When the examiner moves the refractor 8 to the inspection position, the examiner causes the subject to hit the forehead against the face support member 31 connected to the holding arm 20, and the eye to be examined inspects the target presented by the target presentation unit 140. The face is supported at a position where it can be observed from the window 81. In this state, the examiner performs the visual function of the subject using the refractor 8.

(Inspection without refractor)
When the inspection using the refractor 8 is completed, the examiner next moves the refractor 8 at the inspection position to the retreat position by moving the refractor 8 at the inspection position in the left-right direction by performing the inspection without using the refractor 8. When the movement of the refractor 8 is completed, the examiner causes the subject to apply a forehead to the face support member 31 connected to the holding arm 20, and the eye to be examined is displayed by the eyesight presenting unit 140 on the visual target from the inspection window 81. Support your face in an observable position. In this state, the examiner performs the visual function of the subject without using the refractor 8.

  Even when the refractor 8 is suspended above the base 139 by the holding arm 20 as in the present embodiment, the same effect as in the first embodiment or the second embodiment can be obtained.

  In the description of the third embodiment, the moving means 138 moves the refractor 8 in the left-right direction along the holding arm 20, but the present invention is not limited to this. The moving means 138 only needs to move the refractor 8 from the inspection position to the retracted position. For example, the moving means 138 may move the refractor 8 up and down to evacuate, or may jump up and evacuate in the forward direction of the subject (see FIG. 16).

  In the description of the third embodiment, the connecting member 32 is assumed to extend in the vertical direction, but is not limited thereto. For example, the connecting member 32 may extend in the left-right direction and be connected to the face support member 31 from the side. Further, the holding arm 20 may rotatably support the refractor 8, and one end of the connecting member 32 may be rotatably connected to a portion of the holding arm 20 that is the center of the rotation shaft.

  In the description of the third embodiment, the refractor 8 has a configuration in which the face support member 82 and the connecting member 83 are removed, but the present invention is not limited thereto. The refractor 8 may include a face support member 82 and a connecting member 83 as in the first embodiment. In this case, the connecting member 32 is provided with the retracting means 33, and the two face support members 82 and 31 are selectively used for the inspection using the reflector 8 and the inspection not using it.

<Modification of Third Embodiment>
A modification of the third embodiment will be described. FIG. 17 is a schematic configuration diagram showing the configuration of this modification. Compared with the third embodiment, this modification is configured such that one end of the connecting member 32 is connected to the face support member 31 and the other end of the connecting member 32 is connected to the base 139. In FIG. 17, the face support member 31 includes both a forehead rest and a chin rest. However, the face support member 31 is not limited to this, and may be either a forehead rest or a chin rest, and can support the face of the subject. The configuration is not limited to these. Since other configurations are the same as those of the third embodiment, description thereof is omitted. Even if it is such a structure, the effect similar to 3rd Embodiment can be acquired.

The external view of the optometry apparatus which concerns on this invention is shown. It is the schematic which looked at the refractor from the subject side. The front view of the optometry apparatus is shown. 1 shows a cross-sectional view of an optometry apparatus. The front view of the optotype display part is shown. It is a figure explaining the arrangement position of a display. The schematic block diagram of a housing is shown. It is a figure explaining the evacuation means of a measurement unit. It is a control block diagram of an optometry apparatus. It is a figure explaining switching of the optical path for distance inspection, and the optical path for near inspection. It is a figure which shows the schematic block diagram in a target display part and an optical path switching unit part. It is a figure which shows the example of a change of the optometry apparatus of 1st Embodiment. It is a schematic block diagram which shows the optometry apparatus of 2nd Embodiment. It is a schematic block diagram which shows the optometry apparatus of 3rd Embodiment. It is a figure explaining the optometry apparatus of 3rd Embodiment. It is a figure which shows the example of a change of the optometry apparatus of 3rd Embodiment. It is a figure which shows the example of a change of the optometry apparatus of 3rd Embodiment.

DESCRIPTION OF SYMBOLS 2 Optometry table unit 3 Target presentation unit 4 Target display part 5 Housing 6 Appearance cover 8 Reflector 10 Holder 20 Holding arm 31 Face support member 32 Connection member 45 Display 50 Concave mirror 51 Protective cover 52 Transparent panel 53 Shielding part 60 Optical path Switching unit 62 Reflecting mirror 70 Control unit 72 Memory 81 Inspection window 90 Controller

Claims (13)

A face support device for supporting the face of a subject when examining the visual function of the eye to be examined using a target presentation unit for presenting a target to a subject eye,
A pair of left and right lens chamber units, including a first face support member that supports the face of the subject in a state where the front of the subject eye is open to hold the position of the subject eye with respect to the optotype presenting unit; A face support device capable of supporting a face of a subject even when the refractor is retracted from the front of the subject. The refractor includes a pair of left and right lens chamber units that switch and arrange optical elements in the inspection window, and is a refractor that is movable between an inspection position and a retracted position by a holding arm having one end connected to a base. And
The first face support member is configured to perform the inspection of the eye using the refractor while the refractor is disposed at the inspection position, and the first face support member while the refractor is disposed at the retracted position. The face support device according to claim 1, which is commonly used for a case where the eye is examined without being used. The optotype presenting unit has an external cover that covers the optotype presenting unit;
The face support device according to claim 1, wherein a base end of the first connecting member is connected to the subject side of the appearance cover. The optotype presenting unit has an external cover that covers the optotype presenting unit;
The base end of the first connecting member is connected to the subject side of the appearance cover,
The holding arm holds the refractor so as to be movable in the vertical direction,
When the refractor moves from the retracted position to the inspection position, the first connecting member extends to a position where it enters between the pair of left and right lens chamber units, and the first face support member is moved from the refractor to the subject. The face support device according to claim 2 arranged in front.   The face support device according to claim 2, wherein a base end of the first connecting member is connected to a holding arm for holding the refractor in a suspended state. A pair of left and right lens chamber units that switch and arrange optical elements in the inspection window, a holding unit that holds the pair of left and right lens chamber units, and the pair of left and right lens chamber units apart from the first face support member And a second face support member that supports the face of the subject in order to fix the position of the eye to be examined, wherein the refractor is retracted from the examination position by a holding arm having one end connected to a base. When inspecting using a refractor movable between positions, using the second face support member,
The face support device according to claim 1, wherein the first face support member is used when an examination is performed in a state where the front of the eye to be examined is opened without using the refractor. The face support device according to claim 6,
A first connecting member having one end connected to the first face support member and the other end connectable to the optotype presenting unit;
Retreating means for retracting the first face support member from the refractor disposed at the inspection position;
A face support device. The face support device according to claim 6,
A first connection member having one end connected to the first face support member and the other end connected to a holding arm that holds the refractor suspended;
Retreating means for retracting the first face support member from the refractor disposed at the inspection position;
A face support device. The face support device according to claim 2, wherein the optotype presenting unit includes a holding arm for hanging and holding the refractor, and a base for fixing one end of the holding arm,
The face support device, wherein the base end of the first connecting member is connected to the base. The optotype presenting unit has an external cover that covers the optotype presenting unit;
The base end of the first connecting member is connected to the subject side of the appearance cover,
The retracting means bends or slides the first connecting member upward, downward, rightward or leftward from the use position when the refractor moves from the retracted position to the inspection position. The face support member is retracted, and the first connecting member and the face support member can be returned to the use position when the refractor moves from the inspection position to the retracted position. Face support device.   The face support device according to claim 1, comprising: a display that displays a target; and a concave mirror that reflects the target luminous flux from the display and presents the target to the eye to be examined. A target presentation unit comprising:   A target presentation unit that presents a target at a near distance of the eye to be examined, the target presentation unit including the face support device according to claim 1. The face support device according to claim 1 is a refractor used for face support, a pair of left and right lens chamber units switching and arranging optical elements on an inspection window, a distance between the pair of left and right lens chamber units, a convergence angle, A holding unit that adjustably holds at least one of the lens unit, a control unit that controls the holding unit to control at least one of the interval between the lens chamber units and the convergence angle, and an inspection position in front of the eye to be examined And a retraction position, and a holding arm that is movably held between,
The control unit controls the holding unit, and when the refractor is moved between the inspection position and the retracted position by a holding arm, a part of the first connecting member of the face support device according to claim 1 is left and right. A refractor capable of widening a distance between a pair of left and right lens chamber units so as to pass between the pair of lens chamber units.

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