JP2018047096A - Optometric apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a new technique for performing eye examination on a condition as closest to a glasses wearing condition as possible.SOLUTION: An optometric apparatus 1 is a non-wearing type optometric apparatus. The optometric apparatus includes a left eye examination unit LU, a right eye examination unit RU, a support member, and a nose pad 3. The left eye examination unit is used for examination of the left subject eye. The right eye examination unit is used for examination of the right subject eye. The support member supports the left eye examination unit and the right eye examination unit. The nose pad comes into contact with the nose of the subject. The left eye examination unit and the right eye examination unit each include one or more optical elements and comprise correction optical systems 12L, 13L, 12R, 13R which can change the refractive power applied to the subject eyes.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an optometry apparatus.

  An optometry apparatus is an apparatus for examining visual acuity, visual function, and the like by presenting a visual target to an eye to be examined through an optical element. For example, the optometry apparatus includes a measurement head and an optotype presenting apparatus. The measurement head changes the optical element applied to the eye to be examined. The optotype presenting apparatus selectively presents an optotype such as a Landolt ring.

  For example, Patent Document 1 includes a target projection optical system that includes a forehead and presents a target to the subject's eye fixed by the forehead, and projecting light onto the subject's eye. An ophthalmologic apparatus including a measuring optical system that measures refractive power is disclosed.

JP 2014-128306 A

  However, in the method disclosed in Patent Document 1, the direction of the measurement optical axis when performing optometry differs from the direction of the visual axis when the subject actually wears glasses. In general, the optical axis of the eyeglass lens worn by the subject is inclined downward. Therefore, the direction of the optical axis of the optical element that corrects the refractive power of the eye to be examined at the time of optometry differs from the direction of the optical axis of the eyeglass lens that the subject actually wears. In general, the subject is different in the distance between the nose and the left eye of the glasses and the distance between the nose and the right eye. Furthermore, the eye is examined using a predetermined corneal apex distance for the subject's eye fixed by the forehead, but the distance from the eyeglass lens to the cornea actually varies depending on the subject. As described above, since the optometry is performed under conditions different from the wearing state of the glasses, the uncomfortable feeling at the time of wearing may be increased for the subject wearing the glasses created based on the optometry result.

  The present invention has been made in view of such circumstances, and an object thereof is to provide a new technique for performing optometry under conditions as close as possible to the wearing state of glasses.

  The optometry apparatus according to the embodiment is a non-wearing optometry apparatus. The optometry apparatus includes a left eye inspection unit, a right eye inspection unit, a support member, and a nose pad. The left eye inspection unit is used to inspect the left eye. The right eye examination unit is used for examining the right eye to be examined. The support member supports the left eye inspection unit and the right eye inspection unit. The nose contacts the subject's nose. Each of the left eye inspection unit and the right eye inspection unit includes one or more optical elements, and includes a correction optical system capable of changing the refractive power applied to the eye to be examined.

  According to the present invention, it is possible to provide a new technique for performing optometry under conditions as close as possible to the wearing state of glasses while reducing the size of the apparatus.

It is the schematic which shows the structural example of the optical system of the optometry apparatus which concerns on embodiment. It is the schematic which shows the structural example of the optical system of the optometry apparatus which concerns on embodiment. It is the schematic which shows the structural example of the optical system of the optometry apparatus which concerns on embodiment. It is the schematic which shows the structural example of the optometry apparatus which concerns on embodiment. It is the schematic which shows the structural example of the optometry apparatus which concerns on embodiment. It is the schematic which shows the structural example of the information processing system of the optometry apparatus which concerns on embodiment. It is a flowchart which shows the operation example of the optometry apparatus which concerns on embodiment. It is the schematic which shows the structural example of the optical system of the optometry apparatus which concerns on the modification of embodiment.

  An example of an embodiment of an optometry apparatus according to the present invention will be described in detail with reference to the drawings. In addition, it is possible to use the description content of the literature referred in this specification, and arbitrary well-known techniques for the following embodiment.

[Optometry device]
The optometry apparatus according to the embodiment is an apparatus capable of performing objective measurement and subjective examination. The objective measurement is to acquire information about the eye to be examined mainly using a physical method without referring to a response from the subject. The objective measurement includes objective measurement for measuring a value relating to the eye to be examined and photographing for obtaining an image of the eye to be examined. Such objective measurement includes, for example, eye refractive power measurement, corneal shape measurement, intraocular pressure measurement, fundus imaging, OCT imaging using an optical coherence tomography (hereinafter referred to as OCT) method, OCT measurement, and the like. OCT imaging includes acquisition of a tomographic image of a subject's eye, a frontal image, and a tomographic image in an arbitrary direction. OCT measurement includes measurement of the layer thickness at an arbitrary part of the eye to be examined, measurement of the axial length, corneal thickness, anterior chamber depth, lens thickness, and the like, and eyeball information representing the structure of the eye to be examined is acquired. . The eyeball information includes an intraocular distance indicating a distance between two predetermined portions in the eye such as an axial length and a lens thickness. However, the configuration of the optometry apparatus according to the embodiment is not limited to this.

  A subjective test is to obtain a result based on a response from a subject. The subjective examination includes, for example, a subjective refraction examination such as a distance examination, a near examination, a contrast examination, and a glare examination, and a visual field examination. In the subjective examination, information (such as a visual target) is presented to the subject, and a result is acquired based on the subject's response to the information.

  Hereinafter, the case where the optometry apparatus according to the embodiment is a non-wearing optometry apparatus capable of executing at least one of arbitrary subjective examination and arbitrary objective measurement will be described, but it may be a wearable optometry apparatus. . Non-wearing optometry devices include stationary optometry devices and portable optometry devices. The optometry apparatus according to the embodiment can perform a distance test and a near-field test as a subjective test, and can measure an eye refractive power as an objective measurement.

<Configuration>
1 to 5 show schematic diagrams of configuration examples of the optometry apparatus according to the embodiment. FIG. 1 schematically shows a configuration of an optical system when the optometry apparatus according to the embodiment is viewed from above. 2A, FIG. 2B, FIG. 3 and FIG. 4 represent schematic views of the configuration of the correction optical system according to the embodiment. FIG. 5 is a schematic diagram illustrating a configuration example of an information processing system of the optometry apparatus according to the embodiment. In the following, the left-right direction (horizontal direction) is the X direction, the up-down direction (vertical direction) is the Y direction, and the direction orthogonal to both the X direction and the Y direction is the Z direction.

  The optometry apparatus 1 according to the embodiment includes a left eye inspection unit LU, a right eye inspection unit RU, and a nose pad 3. The left-eye examination unit LU accommodates a left-eye examination optical system for performing subjective examination and objective measurement on the subject's left examined eye EL. The right eye examination unit RU accommodates a right eye examination optical system for performing subjective examination and objective measurement on the subject's right eye ER. The left eye inspection optical system and the right eye inspection optical system are configured symmetrically. The left eye inspection unit LU can be moved in the X direction by a moving mechanism ULD described later. The right eye examination unit RU can be moved in the X direction independently of the left eye examination unit LU by a movement mechanism URD described later. Thereby, the distance in the X direction between the left eye examination unit LU (optometry window) and the right eye examination unit RU (optometry window) can be changed in accordance with the distance between the pupils of the subject. The nose pad 3 is in contact with the subject's nose Ns (for example, the side of the back of the nose and the upper part of the nose wing). The optometry apparatus 1 performs a subjective examination or eye refractive power measurement on the left eye to be examined EL with the left eye examination optical system, and a right subject with the right eye examination optical system for the subject whose nose Ns is in contact with the nose pad 3. A subjective examination or eye refractive power measurement for the optometry ER can be performed simultaneously.

  The housing installed on the setting table such as the optometry table accommodates the left eye inspection unit LU and the right eye inspection unit RU, so that the housing can support the left eye inspection unit LU and the right eye inspection unit RU. Is possible. In this case, the nose pad 3 is provided in the housing. The nose pad 3 may include a pad with which the subject's nose is brought into contact and a krings having one end fixed to the housing and the other end fixed to the pad.

  Further, the left eye inspection unit LU and the right eye inspection unit RU may be supported from above by the arm member. In this case, the nose pad 3 is provided on the arm member. The nose pad 3 may include a pad with which the subject's nose is brought into contact and a krings having one end fixed to the arm member and the other end fixed to the pad.

  The left eye inspection unit LU includes a correction optical unit U1L and a measurement optical unit U2L. The correction optical unit U1L accommodates an optometry window 11L, correction optical systems 12L and 13L, and a turret plate rotation mechanism 12LD described later. As will be described later, the measurement optical unit U2L accommodates the optotype presenting optical system 20L and the refractive power measurement optical system 30L. The left-eye inspection optical system includes an optical system housed in the correction optical unit U1L and an optical system housed in the measurement optical unit U2L.

  The right eye examination unit RU includes a correction optical unit U1R and a measurement optical unit U2R. The correction optical unit U1R accommodates an optometry window 11R, correction optical systems 12R and 13R, and a turret plate rotation mechanism 12RD described later. The measurement optical unit U2R houses the optotype presenting optical system 20R and the refractive power measurement optical system 30R. The right-eye examination optical system includes an optical system housed in the correction optical unit U1R and an optical system housed in the measurement optical unit U2R.

  Since the left eye inspection optical system and the right eye inspection optical system are configured symmetrically, the corresponding parts are denoted by the same reference numerals, and the parts constituting the left eye inspection optical system are indicated by “ “L” is added, and “R” is added to the end of the reference numerals and the like for the parts constituting the right-eye examination optical system. Hereinafter, the left-eye inspection optical system will be described unless otherwise specified, and description of the right-eye inspection optical system will be omitted as appropriate.

(Correction optics unit)
As described above, the correction optical unit U1L includes the optometry window 11L, the correction optical systems 12L and 13L, and the turret plate rotation mechanism 12LD (see FIG. 5).

  The correction optical system 12L includes one or more optical elements, and is an optical system that can change the refractive power applied to the left eye EL in a first step (for example, 3D (diopter) step). In this embodiment, the correction optical system 12L (12R) includes two or more optometric lenses having different refractive powers, and the position of the rotation axis CL (CR) substantially parallel to the optical axis of the correction optical system 12L (12R). Turret plates 121L and 122L (121R and 122R) that are rotatable around the center. The turret plate 121L is disposed on the left eye EL side with respect to the turret plate 122L. The turret plates 121L and 122L are independently rotated about the rotation axis CL by the turret plate rotation mechanism 12LD. Thereby, two or more optometry lenses can be selectively applied to the left eye EL.

  As shown in FIG. 2A, the turret plate 121L is provided with a hole HL1 and optometry lenses TL1 to TL3 in a circumferential direction around the rotation axis CL. As shown in FIG. 2B, the turret plate 122L is provided with holes HL2 and optometry lenses TL4 to TL6 in the circumferential direction around the rotation axis CL. The optometry lenses are arranged on the turret plates 121L and 122L so that the refractive power of the optometry lens arranged on the turret plate 122L does not exceed the refractive power of the optometry lens arranged on the turret plate 121L. For example, each of the optometry lenses TL1 to TL3 in the turret plate 121L has a refractive power of −6D, −12D, and −9D, and each of the optometry lenses TL4 to TL6 in the turret plate 122L is −3D, + 6D, and + 3D. Has refractive power. Thereby, it is possible to improve the refractive power accuracy at a position away from the left eye EL of the subject whose nose Ns contacts the nose pad 3 by a predetermined corneal apex distance (for example, 12 mm or 15 mm). By rotating the turret plates 121L and 122L independently about the rotation axis CL by the turret plate rotation mechanism 12LD, the refractive power applied to the left eye EL is measured in a 3D measurement step between −15D and 6D. Can be changed. As will be described later, the optotype presenting optical system 20L can change the refractive power applied to the left eye EL in a measurement step (for example, a 0.25D measurement step) smaller than the 3D measurement step. Thereby, a desired refractive power can be applied to the left eye to be examined EL within a predetermined range while greatly reducing the types of optometry lenses.

  At least one of the optometry lenses TL1 to TL6 arranged on the turret plates 121L and 122L may be detachable. In this case, it is possible to newly attach an optometry lens having a refractive power different from that of the optometry lenses TL1 to TL6 to the mounting portion of the optometry lens removed from the turret plate. Thereby, it is possible to widen or narrow the change range of the refractive power applied to the left eye to be examined EL. In particular, by attaching an optometric lens having a refractive power stronger than −12D to the mounting portion, the refractive power applied to the left eye EL can be changed in a wider range than −15D to 6D.

  By changing the refractive power applied to the left eye EL in the rough measurement step, the number of optometry lenses arranged on the turret plates 121L and 122L can be reduced. In this embodiment, the optometry lenses TL1 to TL6 may be large-diameter refractive lenses having a diameter of 24 mm or more. As a result, it is possible to use an optometric lens with little distortion even when the refractive power is strong, and to perform a subjective examination using an optometric lens that is close to the lens of the glasses actually worn. Become. Further, by using a large-diameter optometric lens, it becomes possible to perform a high-precision subjective examination under conditions close to the wearing state of the glasses even outside the optical axis of the correction optical system 12L, as will be described later. Furthermore, since the subjective examination can be performed with a long progressive zone length, the subjective examination can be performed under conditions close to the state in which progressive glasses are actually worn.

  The correction optical system 13L is an optical system for correcting astigmatism and strabismus of the left eye EL. For example, the correction optical system 13L includes two cylindrical lenses that can rotate around the optical axis of the correction optical system 13L, and a lens rotation mechanism 131LD (described later) that rotates these two cylindrical lenses independently. . The two cylindrical lenses are arranged so that a lens axis parallel to the cylindrical axis is orthogonal to the optical axis of the correction optical system 13L. Astigmatism of the left eye EL is corrected by relatively rotating the two cylindrical lenses by the lens rotating mechanism 131LD.

  Further, for example, the correction optical system 13L includes two wedge prisms that can rotate around the optical axis of the correction optical system 13L, and a prism rotation mechanism 132LD (described later) that independently rotates these two wedge prisms. including. The wedge prism includes a parallel surface disposed so as to be orthogonal to the optical axis of the correction optical system 13L, and an optical surface provided so as to make a predetermined declination with respect to the parallel surface. The two wedge prisms are arranged so that their parallel surfaces face each other and the lens axis substantially coincides with the optical axis of the correction optical system 13L. The perspective of the left eye EL is corrected by independently rotating the two wedge prisms by the prism rotation mechanism 132LD.

  The correction optical system 12L may include a refractive power variable lens such as a liquid lens, for example, and the refractive power applied to the left eye EL may be changed by the variable refractive power lens. Thereby, the number of optometry lenses accommodated in the correction optical system 12L can be reduced. The correction optical system 13L may include, for example, a refractive power variable lens such as a liquid lens, and may correct astigmatism and strabismus of the left eye EL using the variable refractive power lens.

As shown in FIG. 3, correction optical system 12L, the optical axis O1L of 13L may be inclined by a predetermined pre-tilt angle theta ₁ down towards the LCD23L below with respect to the optical axis O2L the target presenting optical system 20L be able to. The front tilt angle θ ₁ corresponds to an angle at which the lens of the spectacles tilts in the vertical direction with respect to the visual axis when the subject wearing spectacles faces directly in front. For example, θ ₁ may be approximately 8 degrees, 10 degrees to 15 degrees, 20 to 25 degrees, or 15 to 20 degrees. Before tilt angle theta ₁ may be a common left-eye inspection unit LU and the right-eye inspection unit RU, it may be different from each other. In embodiments, correction optical system 12L, the optical axis O1L corrective optical unit U1L housing the 13L, inclined by the front inclined angle theta ₁ downward toward the LCD23L respect to the optical axis O2L measuring optical unit U2L . Thereby, the subjective examination can be performed under conditions close to the wearing state of the glasses.

Before tilt angle theta ₁ may be a changeable in common to the left eye examination unit LU and the right-eye inspection unit RU, it may be changed independently of each other. In this case, it may be changed before the inclination angle theta ₁ according to the type of subjective examination. For example, the left eye inspection unit LU may include a front tilt angle changing mechanism for changing the vertical angle of the optical axis O1L of the correction optical systems 12L and 13L with respect to the optical axis O2L of the optotype presenting optical system 20L. The front inclination angle changing mechanism may be a known rotation mechanism that rotates at least one of the correction optical unit U1L and the measurement optical unit U2L about the X-direction axis. The front tilt angle changing mechanism may tilt the optical axis O2L with respect to the optical axis O1L by tilting the measurement optical unit U2L in the vertical direction with respect to the fixed correction optical unit U1L. Further, the front tilt angle changing mechanism may tilt the optical axis O2L with respect to the optical axis O1L by tilting the correction optical unit U1L in the vertical direction with respect to the fixed measurement optical unit U2L.

As shown in FIG. 4, correction optical system 12L, the optical axis O1L of 13L, the predetermined warp angle theta ₂ only inclined outwardly towards the LCD23L below with respect to the optical axis O2L the target presenting optical system 20L ing. The warp angle θ ₂ corresponds to an angle at which the lens of the spectacles tilts in the left-right direction with respect to the visual axis when the subject wearing spectacles faces directly in front. For example, theta ₂ may be a 5 to 10 degrees. Warp angle theta ₂ may be a common left-eye inspection unit LU and the right-eye inspection unit RU, may be different from each other. In embodiments, correction optical system 12L, the optical axis O1L corrective optical unit U1L housing the 13L, inclined by warp angle theta ₂ outwardly toward the LCD23L respect to the optical axis O2L measuring optical unit U2L . Further, correction optical system 12R, the optical axis O1R corrective optical unit U1R housing the 13R, inclined by warp angle theta ₂ outwardly toward the LCD23R respect to the optical axis O2R measuring optical unit U2R. Thereby, the subjective examination can be performed under conditions close to the wearing state of the glasses.

Warp angle theta ₂ may be a changeable in common to the left eye examination unit LU and the right-eye inspection unit RU, it may be changed independently of each other. For example, the left eye examination unit LU may include a warp angle changing mechanism for changing the left-right angle of the optical axis O1L of the correction optical systems 12L and 13L with respect to the optical axis O2L of the optotype presenting optical system 20L. Similarly, the right eye examination unit RU may include a warp angle changing mechanism for changing the angle of the optical axis O1R of the correction optical systems 12R and 13R with respect to the optical axis O2R of the optotype presenting optical system 20R. The warp angle changing mechanism may be a known rotation mechanism that rotates the correction optical unit U1L about the axis in the Y direction.

(Measurement optical unit)
As described above, the measurement optical unit U2L accommodates the optotype presenting optical system 20L and the refractive power measurement optical system 30L.

  The optotype presenting optical system 20L presents the optotype to the left eye EL. The optotype presenting optical system 20L can display a distance target for performing a distance test and a near target for performing a near test side by side on the left eye EL. The optotype presenting optical system 20L includes a beam splitter BS1L, an imaging lens 21L, a rod glass 22L, and an LCD 23L. FIG. 1 shows an outline of a visual target displayed on the LCD 23L.

  The imaging lens 21L includes a convex lens disposed between the LCD 23L and the beam splitter BS1L (or the correction optical systems 12L and 13L). The focal length of the imaging lens 21L is determined according to the size of one pixel of the LCD 23L. When the LCD 23L is a micro display having a size of one pixel of 0.0096 mm × 0.0096 mm, the focal length f of the imaging lens 21L may be 66 mm. Assuming that the size of the cut of the Landolt ring target corresponding to visual acuity 2.0 in a 5 m optometry (distance examination) with an inspection distance of 5 m is one pixel, the focal length f [mm] of the imaging lens 21L is It is calculated from (1). In the formula (1), the viewing angle θ = 0.5 ′.

  For example, when the LCD 23L is a micro display having a resolution of 1280 pixels × 720 pixels or more and the diagonal length of the display area is less than 1 inch, considering the variation in the size of one pixel of a plurality of manufacturers' micro displays The focal length f of the imaging lens 21L may be included in the range of 50 mm to 80 mm.

  The imaging lens 21L may be movable in the optical axis direction of the optotype presenting optical system 20L by a lens moving mechanism 21LD described later. The lens moving mechanism 21LD is controlled by a control unit to be described later, and moves the imaging lens 21L to the target-presenting optics in a moving step corresponding to a measuring step smaller than the 3D measuring step (for example, a measuring step of 0.25D). It moves in the optical axis direction of the system 20L. Thereby, the refractive power applied to the left eye EL can be changed with a small measurement step.

  The rod glass 22L is an optical member that changes the focal position of the imaging lens 21L. By presenting a visual target through the rod glass 22L to the left eye EL, or presenting a visual target without passing through the rod glass 22L, it is possible to perform subjective tests at different inspection distances. The rod glass 22L is provided at a position between the LCD 23L and the imaging lens 21L and at a position deviated from the optical axis of the visual target presenting optical system 20L. The rod glass 22L is a parallel plane member in which the end surface on the LCD 23L side and the end surface on the imaging lens 21L side are substantially parallel. The rod glass 22L is disposed in the direction of the subject's nose with respect to the optical axis of the optotype presenting optical system 20L. Further, the rod glass 22L is disposed below the optical axis of the optotype presenting optical system 20L.

  A near vision test is possible by presenting the near vision target to the left eye EL through the rod glass 22L. The length d in the optical axis direction of the optotype presenting optical system 20L of the rod glass 22L is determined according to the inspection distance. In this embodiment, when a near eye target is presented to the left eye EL through the rod glass 22L in a 0.25m eye examination (near eye examination) with an examination distance of 0.25m, the length d = 48.612 (mm ). The length d can be determined as follows.

  When the rod glass 22L is inserted, the focal length of the imaging lens 21L becomes longer by ΔL (mm). When the refractive index of the rod glass 22L is n, ΔL is expressed as in Expression (2).

  On the other hand, the amount of movement ΔM (mm) of the imaging lens 21L (focal length f) for 1D necessary for focus adjustment by inserting the rod glass 22L is expressed as Expression (3).

  The amount of focus adjustment required for switching between the 5 m optometry and the 0.25 m optometry is equivalent to the product (= ΔK × ΔM) of the refractive power ΔK corresponding to the difference in the examination distance and the movement amount ΔM obtained by Expression (3). To do. The focus adjustment amount is set equal to the above ΔL. Therefore, ΔL is expressed as in Expression (4).

  Assuming that the refractive index n of the rod glass 22L = 1.51633, the length d = 48.612 (mm) of the rod glass 22L is obtained from the equations (1) and (4).

  The rod glass 22L may be inserted / removed between the beam splitter BS1L and the LCD 23L according to the type of subjective examination.

  The LCD 23L can display a distance target, a near target, or both a distance target and a near target under the control of a control unit described later. For example, the LCD 23L displays one of the distance target and the near target at a position corresponding to the optical axis of the target presentation optical system 20L, and the distance target and the near target at a position corresponding to the rod glass 22L. The other target is displayed. In this embodiment, the LCD 23L displays a distance target at a position corresponding to the optical axis of the target presentation optical system 20L, and displays a near target at a position corresponding to the rod glass 22L. The position corresponding to the optical axis in the LCD 23L includes a position where the optical axes intersect in the display area of the LCD 23L or the vicinity thereof. The position corresponding to the rod glass 22L on the LCD 23L includes a position where the axis of the optical axis direction of the rod glass 22L intersects in the display area of the LCD 23L or the vicinity thereof.

  The LCD 23L can be moved in the optical axis direction of the visual target presenting optical system 20L by a visual target moving mechanism 23LD described later. The target moving mechanism 23LD is controlled by a control unit to be described later, and moves the LCD 23L of the target presenting optical system 20L in a moving step corresponding to a measuring step smaller than the 3D measuring step (for example, a measuring step of 0.25D). Move in the direction of the optical axis. For example, the target moving mechanism 23LD moves the LCD 23L in the optical axis direction of the target presenting optical system 20L in units of ΔM × 0.25D = 1.089 (mm) using ΔM in Expression (3). , The refractive power applied to the left eye EL can be changed in the measurement step of 0.25D.

  The LCD 23L is a micro display as described above. Thereby, it is possible to reduce the size of the visual target presenting optical system 20L that can switch between the distance inspection and the near inspection in a short time.

  The beam splitter BS1L is an optical path combining member that forms a combined optical path of an optical path of the visual target presenting optical system 20L and an optical path of a refractive power measuring optical system 30L described later.

  In the visual target presenting optical system 20L as described above, the distance visual target displayed on the LCD 23L passes through the imaging lens 21L without passing through the rod glass 22L, passes through the beam splitter BS1L, and corrects the optical system 13L. 12L passes through the optometry window 11L and is presented to the left eye EL. The near-field target displayed on the LCD 23L passes through the rod glass 22L, passes through the imaging lens 21L, passes through the beam splitter BS1L, passes through the correction optical systems 13L and 12L, and the optometry window 11L, and passes through the left subject. Presented on optometry EL. Thereby, it is possible to switch between the distance test using the distance target and the near test using the near target simply by switching the direction of the line of sight of the left eye EL.

(Refractive power measurement optical system)
The refractive power measurement optical system 30L objectively measures the refractive power of the left eye EL. The refractive power measurement optical system 30L includes a light source 31L, a collimator lens 32L, a beam splitter BS2L, a mask plate 33L, and an image sensor 34L. A predetermined transmission pattern is formed on the mask plate 33L. The part other than the transmission pattern is a light shielding part.

  The light source 31L is a point light source that emits infrared light. The collimator lens 32L converts the infrared light from the light source 31L into parallel light. The infrared light converted into parallel light by the collimator lens 32L passes through the beam splitter BS2L and is reflected by the beam splitter BS1L toward the left eye EL. The infrared light reflected by the beam splitter BS1L passes through the correction optical systems 13L and 12L, passes through the optometry window 11L, and is projected onto the left eye EL. The return light of the infrared light from the left eye EL passes through the optometry window 11L, passes through the correction optical systems 12L and 13L, is reflected by the beam splitter BS1L, and is reflected by the beam splitter BS2L toward the mask plate 33L. The The return light reflected by the beam splitter BS2L is projected onto the mask plate 33L. The return light that has passed through the transmission pattern formed on the mask plate 33L is projected onto the imaging surface of the imaging device 34L. The optometry apparatus 1 obtains the refractive power of the left eye to be examined EL by analyzing the pattern image acquired by the imaging element 34L by a later-described arithmetic processing unit 110 using a known method. The obtained refractive power may be used to determine whether or not an image is formed on the retina through the correction optical systems 12L and 13L.

  The configuration of the refractive power measurement optical system 30L according to the embodiment is not limited to the configuration illustrated in FIG. The configuration of the refractive power measurement optical system 30L according to the embodiment may be, for example, the configuration disclosed in Japanese Patent No. 3071693.

(Information processing system)
FIG. 5 shows an example of the functional configuration of the information processing system of the optometry apparatus 1. The information processing system includes a control unit 100, an arithmetic processing unit 110, a display unit 120, and an operation unit 130. The control unit 100 includes an arithmetic processing unit 110, correction optical systems 12L, 13L, 12R, and 13R, optotype presenting optical systems 20L and 20R, refractive power measurement optical systems 30L and 30R, moving mechanisms ULD and URD, and a display unit 120. Control.

  The control unit 100 includes a main control unit 101 and a storage unit 102. The control unit 100 includes, for example, a microprocessor, a RAM (Random Access Memory), a ROM (Read Only Memory), a hard disk drive, and the like.

  The main control unit 101 performs various controls of the optometry apparatus 1. In particular, the main control unit 101 includes, for the left eye inspection unit LU, a turret plate rotation mechanism 12LD, a lens rotation mechanism 131LD, a prism rotation mechanism 132LD, a lens movement mechanism 21LD, an LCD 23L, a target movement mechanism 23LD, a light source 31L, The imaging device 34L, the moving mechanism ULD, and the like are controlled.

  The moving mechanism ULD moves the left eye inspection unit LU in the X direction (left and right direction). The moving mechanism URD moves the right eye inspection unit RU in the X direction. By moving the left eye examination unit LU and the right eye examination unit RU in the X direction by the movement mechanisms ULD and URD, the left eye examination unit LU and the right eye examination unit RU are arranged in accordance with the distance between the pupils of the subject. It is possible. The moving mechanism ULD is provided with an actuator that generates a driving force for moving the moving mechanism ULD and a transmission mechanism that transmits the driving force to a holding member that holds the left-eye examination unit LU. The actuator receives a control signal from the control unit 100 and generates a driving force corresponding to the control signal. The actuator is constituted by, for example, a pulse motor. The transmission mechanism is configured by, for example, a combination of gears, a rack and pinion, or the like. The same applies to the moving mechanism URD.

  The main control unit 101 arranges the left eye examination unit LU and the right eye examination unit RU according to the distance between the pupils of the subject by controlling the moving mechanisms ULD and URD in response to a user operation on the operation unit 130. Is possible. The main control unit 101 controls the moving mechanisms ULD and URD based on the position of the pupil of the left eye to be examined EL and the position of the pupil of the right eye to be examined ER, so as to match the distance between the pupils of the subject. An eye examination unit LU and a right eye examination unit RU may be arranged. In this case, for each of the left eye to be examined EL and the right eye to be examined ER, there are provided two or more cameras that photograph the anterior eye portion of the eye to be examined substantially simultaneously from different directions. The main control unit 101 analyzes the anterior segment image obtained by these cameras and causes the arithmetic processing unit 110 to specify the positions of the pupils of the left eye EL and the right eye ER, and based on the specified positions. Controls the moving mechanisms ULD and URD. The main control unit 101 controls the movement mechanisms ULD and URD based on the analysis result of the anterior segment image, so that the eye to be examined and the optical system in at least one of the Y direction and the Z direction are not limited to the X direction. May be aligned.

  The moving mechanism ULD can change the relative positions of the optical axes of the correction optical systems 12L and 13L included in the left eye inspection unit LU with respect to the nose pad 3. Similarly, the moving mechanism URD can change the relative positions of the optical axes of the correction optical systems 12R and 13R included in the right eye inspection unit RU with respect to the nose pad 3. The main control unit 101 can perform alignment of the correction optical systems 12L and 13L with respect to the nose pad 3 and alignment of the correction optical systems 12R and 13R with respect to the nose pad 3 by controlling the moving mechanisms ULD and URD. For example, the left eye inspection unit LU captures a first alignment optical system that projects an alignment target on the left eye to be examined EL, and a first image that captures the left subject eye on which the alignment target is projected by the first alignment optical system. And an optical system. Similarly, the right eye examination unit RU projects a second alignment optical system that projects an alignment target on the right eye ER, and a second eye that projects the right eye on which the alignment target is projected by the second alignment optical system. A photographing optical system. In this case, the main control unit 101 (control unit 100) controls the moving mechanism ULD based on the image of the left eye EL obtained by imaging with the first imaging optical system to correct the correction optical system 12L for the nose pad 3. Correcting optical systems 12R and 13R for the nose pad 3 by changing the relative position of the optical axis of 13L and controlling the moving mechanism URD based on the image of the right eye ER obtained by photographing with the second photographing optical system. It is possible to change the relative position of. Thereby, the alignment of the correction optical system for the left eye and the correction optical system for the right eye can be performed based on the nose pad 3.

  Further, the moving mechanisms ULD and URD may manually move the left eye inspection unit LU and the right eye inspection unit RU.

  Further, the moving mechanism ULD may include at least one of the front inclination angle changing mechanism and the warp angle changing mechanism. The movement mechanism ULD receives the control from the control unit 100 and changes the front inclination angle and the warp angle.

  The turret plate rotation mechanism 12LD transmits an actuator that generates a driving force for rotating the turret plates 121L and 122L, and a transmission that transmits the driving force to a holding member that rotatably holds the turret plates 121L and 122L. A mechanism is provided. The actuator receives a control signal from the control unit 100 and generates a driving force corresponding to the control signal. The actuator is constituted by, for example, a pulse motor. The transmission mechanism is configured by, for example, a combination of gears, a rack and pinion, or the like. The same applies to the turret plate rotation mechanism 12RD. Similarly, the lens rotation mechanisms 131LD and 131RD and the prism rotation mechanisms 132LD and 132RD are provided with an actuator and a transmission mechanism.

  The lens moving mechanism 21LD moves the imaging lens 21L in the optical axis direction of the optotype presenting optical system 20L. The lens moving mechanism 21RD moves the imaging lens 21R in the optical axis direction of the optotype presenting optical system 20R. The lens moving mechanism 21LD includes an actuator that generates a driving force for moving the imaging lens 21L and a transmission mechanism that transmits the driving force to a holding member that holds the imaging lens 21L. The actuator receives a control signal from the control unit 100 and generates a driving force corresponding to the control signal. The same applies to the lens moving mechanism 21RD.

  The target moving mechanism 23LD moves the LCD 23L in the optical axis direction of the target presenting optical system 20L. The target moving mechanism 23RD moves the LCD 23R in the optical axis direction of the target presenting optical system 20R. The target moving mechanism 23LD includes an actuator that generates a driving force for moving the LCD 23L and a transmission mechanism that transmits the driving force to a holding member that holds the LCD 23L. The actuator receives a control signal from the control unit 100 and generates a driving force corresponding to the control signal. The same applies to the target moving mechanism 23RD.

  The main control unit 101 can change the refractive power applied to the left eye EL by executing coordinated control on the turret plate rotation mechanism 12LD and the target moving mechanism 23LD. For example, the main control unit 101 controls the target moving mechanism 23LD while controlling the turret plate rotating mechanism 12LD to change the refractive power applied to the left eye EL in the 3D measurement step, thereby controlling 0.25D. In this measurement step, the refractive power applied to the left eye EL is changed. Specifically, the main control unit 101 controls the turret plate rotation mechanism 12LD to change the refractive power by + 3D, and then controls the target moving mechanism 23LD to change the refractive power by + 0.25D. repeat. That is, the LCD 23L is repeatedly moved by + 0.25D based on the initial position. When the main control unit 101 repeats the change of + 0.25D 12 times, the main control unit 101 controls the turret plate rotating mechanism 12LD to further change the refractive power by + 3D, and controls the target moving mechanism 23LD to restore the LCD 23L to the original initial value. After returning to the position, changing the refractive power by + 0.25D is repeated.

  The main control unit 101 may change the refractive power applied to the left eye to be examined EL by executing coordinated control on the turret plate rotation mechanism 12LD and the lens moving mechanism 21LD. In this case, as described above, the main control unit 101 controls the lens moving mechanism 21LD while controlling the turret plate rotating mechanism 12LD and changing the refractive power applied to the left eye EL in the 3D measurement step. Then, the refractive power applied to the left eye to be examined EL is changed in the measurement step of 0.25D.

  In addition, the main control unit 101 controls the liquid lens provided in the correction optical system 13L while controlling the turret plate rotation mechanism 12LD to change the refractive power applied to the left eye EL in the 3D measurement step. Then, the refractive power applied to the left eye to be examined EL may be changed in the measurement step of 0.25D. Further, the main control unit 101 changes the refractive power applied to the left eye EL by executing coordinated control on the turret plate rotation mechanism 12LD, the target movement mechanism 23LD, and the lens movement mechanism 21LD. Good.

  Similar to the control for the left eye inspection unit LU, the main control unit 101 controls the turret plate rotation mechanism 12RD, the lens rotation mechanism 131RD, the prism rotation mechanism 132RD, the lens movement mechanism 21RD, the LCD 23R, The target moving mechanism 23RD, the light source 31R, the image sensor 34R, the moving mechanism URD, and the like are controlled.

  The main control unit 101 controls the imaging elements 34L and 34R to capture the acquired signal and cause the arithmetic processing unit 110 to perform analysis processing and the like.

  Further, the main control unit 101 performs processing for writing data into the storage unit 102 and processing for reading data from the storage unit 102.

  The storage unit 102 stores various data. Examples of data stored in the storage unit 102 include various measurement results and eye information to be examined. The eye information includes information about the subject such as patient ID and name, and information about the eye such as left / right eye identification information. The storage unit 102 stores various programs and data for operating the optometry apparatus 1.

  The arithmetic processing unit 110 receives a control from the control unit 100 and executes predetermined analysis processing and the like. The arithmetic processing unit 110 includes a refractive power calculation unit 111. The refractive power calculation unit 111 analyzes the image based on the return light projected on the imaging surfaces of the imaging elements 34L and 34R obtained by the refractive power measurement optical systems 30L and 30R, thereby causing the left eye EL and the right eye to be examined. Calculate the refractive power of each ER. For example, the refractive power calculation unit 111 obtains the refractive power by analyzing the size, shape, distribution, and the like of the image based on the return light by a known analysis process.

  The display unit 120 displays various information under the control of the control unit 100. The operation unit 130 is used for operating the optometry apparatus 1. The operation unit 130 includes various hardware keys (joysticks, buttons, switches, etc.) provided in the optometry apparatus 1. The operation unit 130 may include various software keys (buttons, icons, menus, etc.) displayed on the touch panel display screen. At least a part of the display unit 120 and the operation unit 130 may be integrally configured. A typical example is a touch panel display screen.

  Further, the optometry apparatus 1 may include a communication unit. The communication unit has a function for communicating with an external device (not shown). The communication unit has a configuration corresponding to the form of communication with the external device. The external device may be any other ophthalmic device. The external device may be a device (reader) having a function of reading information from a recording medium or a device (writer) having a function of writing information to the recording medium. Another example of the external device is a computer used in the medical institution. Such hospital computers include, for example, a hospital information system (HIS) server, a DICOM (Digital Imaging and Communications in Medicine) server, and a doctor terminal. The external device may include a computer used outside the medical institution. Examples of such out-of-hospital computers include mobile terminals, personal terminals, servers and terminals on the manufacturer side of the optometry apparatus 1, and cloud servers.

  The housing that accommodates the left eye inspection unit LU and the right eye inspection unit RU or the arm member that supports the left eye inspection unit LU and the right eye inspection unit RU from above is an example of the “support member” according to the embodiment. The moving mechanism ULD is an example of a “first moving mechanism” according to the embodiment. The moving mechanism URD is an example of a “second moving mechanism” according to the embodiment. The beam splitters BS1L and BS1R are examples of the “optical path combining member” according to the embodiment. The LCDs 23L and 23R are examples of the “display unit” according to the embodiment. The imaging lenses 21L and 21R are examples of the “convex lens” according to the embodiment. The rod glasses 22L and 22R are examples of “parallel plane members” according to the embodiment. The front inclination angle changing mechanism is an example of the “first rotation mechanism” according to the embodiment. The warp angle changing mechanism is an example of the “second rotating mechanism” according to the embodiment.

<Operation example>
An operation example of the optometry apparatus 1 according to the embodiment will be described.

  FIG. 6 shows a flowchart of an operation example of the optometry apparatus 1 according to the embodiment.

(S1)
First, after the subject's nose Ns is brought into contact with the nose pad 3 provided in the optometry apparatus 1, the main control unit 101 controls the movement mechanisms ULD and URD as described above, thereby the subject's nose Ns. The left eye inspection unit LU and the right eye inspection unit RU are arranged based on the nose pad 3 according to the interpupillary distance. Thereby, the left eye to be examined EL is arranged at a position where the visual target is presented through the optometry window 11L, and the right eye ER is arranged at a position where the visual target is presented through the optometry window 11R.

  Further, the main control unit 101 presents a red point target on the left eye EL by displaying a red point target at a predetermined display position on the LCD 23L, and a green point target on the predetermined display position on the LCD 23R. By displaying the target, a green point target is presented to the right eye ER, and the left eye unit LU is controlled by controlling the moving mechanisms ULD and URD so that the red point target and the green point target overlap. And the right eye examination unit RU may be arranged. Thereby, the left eye inspection unit LU and the right eye inspection unit RU can be arranged so that the subject is fused. The display position of the point target on the LCD 23L may be substantially the same as the display position of the point target on the LCD 23R.

(S2)
The main control unit 101 waits for a user's predetermined operation input to the operation unit 130 (step S2: N). When a predetermined operation is performed on the operation unit 130 (step S2: Y), the operation of the optometry apparatus 1 proceeds to S3.

  Further, a sensor for detecting that the subject's nose Ns is brought into contact with the nose pad 3 is provided, and the main control unit 101 shifts the operation of the optometry apparatus 1 to S3 based on the detection result of the sensor. Also good.

(S3)
When a predetermined operation is performed on the operation unit 130 (step S2: Y), the main control unit 101 causes the left eye EL and the right eye ER to perform objective measurement. Specifically, the main control unit 101 controls the light sources 31L and 31R to emit infrared light, and the image based on the return light of the infrared light acquired by the imaging elements 34L and 34R is input to the arithmetic processing unit 110. Let it be analyzed. In the arithmetic processing unit 110, the refractive power calculation unit 111 performs a known analysis process on the image based on the return light, whereby the refractive power of the left eye EL (objective measurement value) and the refraction of the right eye ER. Seeking power.

(S4)
The main control unit 101 controls the turret plate rotation mechanism 12LD, the lens rotation mechanism 131LD, and the prism rotation mechanism 132LD so as to reproduce the refractive power of the left eye EL obtained in S3. If necessary, the main control unit 101 may control the lens moving mechanism 21LD and the target moving mechanism 23LD. Similarly, the main control unit 101 controls the turret plate rotation mechanism 12RD, the lens rotation mechanism 131RD, and the prism rotation mechanism 132RD so as to reproduce the refractive power of the right eye ER determined in S3. The main control unit 101 may control the lens moving mechanism 21RD and the target moving mechanism 23RD as necessary.

(S5)
The main control unit 101 controls the optotype presenting optical systems 20L and 20R to execute 5m optometry. Specifically, the main control unit 101 controls the LCD 23L to display the distance target at or near the optical axis of the target presentation optical system 20L, and controls the LCD 23R to display the target presentation optical. A distance target is displayed at a position intersecting the optical axis of the system 20R or in the vicinity thereof. Thereby, the distance target displayed on the LCD 23L is presented to the left eye E, and the distance target displayed on the LCD 23R is presented to the right eye ER. The subject responds to the visual target, receives a predetermined operation, and the main control unit 101 further controls the turret plate rotation mechanisms 12LD, 12RD, and the like. For example, in visual acuity measurement, the next visual target is selected and presented based on the response to the Landolt ring or the like, and this is repeated to determine the visual acuity value.

(S6)
Subsequently, the main control unit 101 controls the optotype presenting optical systems 20L and 20R to execute 0.25m optometry. Specifically, the main control unit 101 controls the LCD 23L to display a near visual target at or near the position where it intersects the optical axis of the rod glass 22L, and controls the LCD 23R to align with the optical axis of the rod glass 22R. A near visual target is displayed at the crossing position or in the vicinity thereof. By directing the line-of-sight direction of the left eye E to the direction of the rod glass 22L, the near eye target displayed on the LCD 23L is presented to the left eye-to-be-examined EL, and the line-of-sight direction of the right eye ER is directed to the direction of the rod glass 22R. By directing, the near eye target displayed on the LCD 23R is presented to the right eye ER. As in S <b> 5, the subject can make a response to the visual target so that the examiner can confirm the necessity of the bifocal glasses. This is the end of the operation of the optometry apparatus 1 (end).

[Modification]
In the embodiment, the case where two types of examination distances (5 m, 0.25 m) are switched in the subjective examination has been described. However, the configuration of the ophthalmologic apparatus according to the embodiment is not limited to this. In the modification according to the embodiment, a case where four types of inspection distances are switched in the subjective examination will be described. Hereinafter, an optometry apparatus according to a modification of the embodiment will be described focusing on differences from the embodiment.

  FIG. 7 shows a configuration example of an optical system of an optometry apparatus according to a modification of the embodiment. 7, parts that are the same as those in FIG. 1 are given the same reference numerals, and descriptions thereof will be omitted as appropriate. FIG. 7 schematically shows the configuration of the cross section in the XZ direction passing through the optical axis of the visual target presenting optical system for the visual target presenting optical system. In FIG. 7, the correction optical systems 12L, 13L, 12R, and 13R, the beam splitters BS1L and BS1R, the refractive power measurement optical systems 30L and 30R, and the like are omitted. FIG. 7 shows an outline of the visual target displayed on the LCDs 23L and 23R.

  The target-presenting optical systems 20L1 and 20R1 according to the modification are different from the target-presenting optical systems 20L and 20R according to the embodiment in that rod glasses 50L and 51L are added to the target-presenting optical system 20L1 and the target-presenting optics. This is the point that rod glasses 50R and 51R are added to the system 20R1. The rod glasses 50L and 50R are parallel plane members for performing 0.5m optometry. The rod glasses 51L and 51R are parallel plane members for performing 1m optometry. The rod glasses 51L, 50L, and 22L are arranged in this order from the side closer to the optical axis of the optotype presenting optical system 20L1. The rod glasses 51R, 50R, and 22R are arranged in this order from the side closer to the optical axis of the optotype presenting optical system 20R1.

  From the formulas (2) to (4), the length d of the rod glasses 50L and 50R is 21.970 mm. Similarly, the length d of the rod glasses 51L and 51R is 10.235 mm.

  The LCD 23L displays a distance visual target at a position corresponding to the optical axis of the visual target presenting optical system 20L1, and a 1 m optometry target at a position corresponding to the rod glass 51L and a position 0. 0 at a position corresponding to the rod glass 50L. A target for 0.25 m optometry is displayed at a position corresponding to the target for 5 m optometry and the rod glass 22L. Similarly, the LCD 23R displays a distance target at a position corresponding to the optical axis of the target presentation optical system 20R1, and a position corresponding to the 1-m optometry target and the rod glass 50R at a position corresponding to the rod glass 51R. And a target for 0.25-m optometry at a position corresponding to the rod glass 22R.

  In the visual target presenting optical system 20L1 as described above, the distance visual target displayed on the LCD 23L passes through the imaging lens 21L, passes through the beam splitter BS1L, and passes through the correction optical systems 13L and 12L and the optometry window 11L. Then, it is presented to the left eye EL. The target for 1-m optometry displayed on the LCD 23L passes through the rod glass 51L, passes through the imaging lens 21L, passes through the beam splitter BS1L, passes through the correction optical systems 13L and 12L, and the optometry window 11L, Presented on the left eye EL. The 0.5m optometry target displayed on the LCD 23L passes through the rod glass 50L, passes through the imaging lens 21L, passes through the beam splitter BS1L, passes through the correction optical systems 13L and 12L, and the optometry window 11L. To the left eye EL. The target for 0.25m optometry displayed on the LCD 23L passes through the rod glass 22L, passes through the imaging lens 21L, passes through the beam splitter BS1L, passes through the correction optical systems 13L and 12L, and the optometry window 11L. To the left eye EL. The same applies to the optotype presenting optical system 20R1. Thus, by simply switching the direction of the line of sight of the eye to be examined, a distance test using a distance target, a near-field test using a target for 1 m optometry, and a target for 0.5 m optometry are used. It is possible to switch between the near-field inspection and the near-field inspection using a target for 0.25-m optometry.

(Action / Effect)
The operation and effect of the optometry apparatus according to the embodiment will be described.

  The optometry apparatus (1) according to the embodiment is a non-wearing optometry apparatus. The optometry apparatus includes a left eye examination unit (LU), a right eye examination unit (RU), a support member, and a nose pad (3). The left eye examination unit is used for examining the left eye to be examined (EL). The right eye examination unit is used for examining the right eye to be examined (ER). The support member supports the left eye inspection unit and the right eye inspection unit. The nose contacts the subject's nose. Each of the left eye examination unit and the right eye examination unit includes one or more optical elements (optometry lenses TL1 to TL6), and includes a correction optical system (12L, 12R) that can change the refractive power applied to the eye to be examined. .

  According to such a configuration, in the non-wearing type optometry apparatus, the subject's nose can be brought into contact with the nose pad and a subjective examination can be performed on both eyes based on the nose pad. Optometry can be performed under conditions as close as possible.

  In addition, the optometry apparatus according to the embodiment includes a first movement mechanism (movement mechanism ULD) that changes the relative position of the optical axis of the correction optical system included in the left eye inspection unit with respect to the nose, and a right eye inspection unit with respect to the nose. May include a second movement mechanism (movement mechanism URD) that changes the relative position of the optical axis of the correction optical system included in the control unit and a control unit (100) that controls the first movement mechanism and the second movement mechanism.

  With such a configuration, it is possible to align the correction optical system for the left eye and the correction optical system for the right eye with reference to the nose. In particular, subjects generally have different distances between the nose and the left eye of the glasses and the distance between the nose and the right eye, but it is possible to perform an eye examination under conditions that are closer to the wearing state of the glasses. become.

  In the optometry apparatus according to the embodiment, the left eye examination unit includes a first alignment optical system that projects an alignment target on the left eye and a left eye on which the alignment target is projected by the first alignment optical system. A right imaging unit that projects an alignment target on the right eye, and the alignment target is projected by the second alignment optical system. A second imaging optical system that images the right eye to be inspected, and the control unit controls the first moving mechanism based on the image of the left eye to be obtained by imaging with the first imaging optical system to Changing the relative position of the optical axis of the correction optical system included in the left-eye examination unit, and controlling the second moving mechanism based on the image of the right eye to be obtained by photographing with the second photographing optical system; It may change the relative position of the optical axis of the correction optical system included in the right eye examination unit with respect to addressed.

  With such a configuration, it is possible to easily control the alignment of the correction optical system for the left eye and the correction optical system for the right eye with reference to the nose.

  In the optometry apparatus according to the embodiment, each of the left eye examination unit and the right eye examination unit includes a display unit (LCDs 23L and 23R), and an optotype presenting that presents the optotype displayed on the display unit to the eye to be examined. An optical system (20L, 20R) may be included.

  According to such a configuration, it is possible to provide an optometric apparatus capable of performing a subjective examination using an internal visual target under conditions as close as possible to the wearing state of glasses.

  In the optometry apparatus according to the embodiment, each of the left eye examination unit and the right eye examination unit includes a refractive power measurement optical system (30L, 30R) that objectively measures the refractive power of the eye to be examined, and a target presentation. An optical path combining member (beam splitter BS1L, BS1R) that forms a combined optical path of the optical path of the optical system and the optical path of the refractive power measurement optical system may be included.

  According to such a configuration, it is possible to provide an optometry apparatus capable of objective measurement under conditions as close as possible to the wearing state of the glasses.

  In the optometry apparatus according to the embodiment, the optotype presenting optical system includes a convex lens (imaging lenses 21L and 21R) disposed between the display unit and the correction optical system, and a position between the display unit and the convex lens. And a parallel plane member (rod glass 22L, 22R) provided at a position deviated from the optical axis of the optotype presenting optical system and having an end surface on the display unit side and an end surface on the convex lens side substantially parallel, The unit may display the distance target at a position corresponding to the optical axis and display the near target at a position corresponding to the parallel plane member.

  According to such a configuration, the parallel plane member is disposed at a position between the display unit and the convex lens and at a position deviated from the optical axis of the optotype presenting optical system, and the display unit is a position corresponding to the optical axis. One of the distance target and the near target is displayed on the screen, and the other of the distance target and the near target is displayed at the position corresponding to the parallel plane member. Without switching, it is possible to switch between the distance test and the near test only by switching the direction of the line of sight of the eye to be examined. Accordingly, it is possible to switch between the distance inspection and the near inspection in a short time while reducing the size of the apparatus.

  In the optometry apparatus according to the embodiment, the optical axis of the correction optical system may be inclined downward by a predetermined angle toward the display unit with respect to the optical axis of the optotype presenting optical system.

  According to such a configuration, since the correction optical system is arranged on the eye to be examined under a condition close to the state in which glasses are actually worn, it becomes possible to perform an eye examination under conditions as close as possible to the wearing state of glasses. .

  In the optometry apparatus according to the embodiment, the predetermined angle may be approximately 8 degrees.

  According to such a configuration, since the correction optical system is arranged for the eye to be examined under the same conditions as when the glasses are actually worn, it is possible to perform the eye examination under conditions as close as possible to the wearing state of the glasses. .

  In addition, the optometry apparatus according to the embodiment may include a first rotation mechanism (front inclination angle changing mechanism) for changing the vertical angle of the optical axis of the correction optical system with respect to the optical axis of the optotype presenting optical system. Good.

  According to such a configuration, the correction optical system can be arranged on the eye to be examined under conditions close to the state in which the eyeglasses are actually worn, depending on the type of the subject and the glasses. Optometry can be performed under conditions as close as possible to the wearing state of eyeglasses for a person or any type of eyeglasses.

  In the optometry apparatus according to the embodiment, the optical axis of the correction optical system may be inclined outward by a predetermined angle toward the display unit with respect to the optical axis of the optotype presenting optical system.

  According to such a configuration, since the direction of the optical axis of the correction optical system can be set with respect to the eye to be examined under conditions close to the state in which glasses are actually worn, optometry is performed under conditions as close as possible to the glasses wearing state. Is possible.

  Further, the optometry apparatus according to the embodiment may include a second rotation mechanism (warp angle changing mechanism) for changing the angle of the optical axis of the correction optical system with respect to the optical axis of the optotype presenting optical system. .

  According to such a configuration, the direction of the correction optical system can be set with respect to the subject's eye under conditions close to the state in which the glasses are actually worn, depending on the type of the subject and the glasses. The eye examination can be performed under conditions as close as possible to the wearing state of the eyeglasses for the subject and any eyeglass type.

(Other)
In the optometry apparatus according to the embodiment or its modification, in addition to the nose pad 3, a forehead support against which the forehead of the subject abuts may be provided.

  The various moving mechanisms according to the embodiment or its modification may be provided with an actuator and a transmission mechanism, similarly to the moving mechanism ULD. Similarly, the various rotation mechanisms according to the embodiment or the modification thereof may be provided with an actuator and a transmission mechanism, similarly to the turret plate rotation mechanism 12LD.

  The embodiment shown above or its modification is merely an example for carrying out the present invention. A person who intends to implement the present invention can make arbitrary modifications, omissions, additions and the like within the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 Optometry apparatus 3 Nosepiece 12L, 13L, 12R, 13R Correction optical system 20L, 20R Target-presenting optical system 21L, 21R Imaging lens 22L, 22R Rod glass 23L, 23R LCD
30L, 30R Refractive power measurement optical systems BS1L, BS1R Beam splitter EL Left eye ER Right eye eye LU Left eye inspection unit RU Right eye inspection unit

Claims (11)

A non-wearing optometry device,
A left-eye examination unit for examining the left eye;
A right eye examination unit for examining the right eye;
A support member for supporting the left eye inspection unit and the right eye inspection unit;
A nose pad that contacts the subject's nose,
Including
Each of the left eye examination unit and the right eye examination unit is
An optometry apparatus comprising: a correction optical system including one or more optical elements and capable of changing a refractive power applied to an eye to be examined. A first movement mechanism for changing a relative position of an optical axis of a correction optical system included in the left eye inspection unit with respect to the nose pad;
A second movement mechanism for changing a relative position of an optical axis of a correction optical system included in the right eye inspection unit with respect to the nose pad;
A control unit for controlling the first moving mechanism and the second moving mechanism;
The optometry apparatus according to claim 1, comprising: The left eye examination unit includes:
A first alignment optical system for projecting an alignment target to the left eye;
A first imaging optical system for imaging the left eye to be examined on which an alignment target is projected by the first alignment optical system;
Including
The right eye examination unit includes:
A second alignment optical system that projects an alignment target on the right eye;
A second imaging optical system for imaging the right eye to be examined, on which an alignment target is projected by the second alignment optical system;
Including
The control unit controls the first moving mechanism based on an image of the left eye to be examined obtained by photographing with the first photographing optical system, and includes a correction optical system included in the left eye examination unit for the nose pad. The right eye examination for the nose pad by changing the relative position of the optical axis and controlling the second moving mechanism based on the image of the right eye to be examined obtained by photographing with the second photographing optical system The optometry apparatus according to claim 2, wherein the relative position of the optical axis of the correction optical system included in the unit is changed. Each of the left eye examination unit and the right eye examination unit is
The optometry apparatus according to any one of claims 1 to 3, further comprising a display unit, and a target presentation optical system that presents the target displayed on the display unit to the eye to be examined. Each of the left eye examination unit and the right eye examination unit is
A refractive power measuring optical system for objectively measuring the refractive power of the eye to be examined;
An optical path combining member that forms a combined optical path of the optical path of the optotype presenting optical system and the optical path of the refractive power measuring optical system;
The optometry apparatus according to claim 4, comprising: The optotype presenting optical system is:
A convex lens disposed between the display unit and the correction optical system;
A parallel plane in which the display unit side end surface and the convex lens side end surface are substantially parallel to each other, provided at a position between the display unit and the convex lens and at a position deviating from the optical axis of the optotype presenting optical system. Members,
Including
The display unit displays a distance target at a position corresponding to the optical axis, and displays a near target at a position corresponding to the parallel plane member. 5. The optometry apparatus according to 5. The optical axis of the correction optical system is inclined downward by a predetermined angle in the direction of the display unit with respect to the optical axis of the optotype presenting optical system. The optometry apparatus as described in any one of Claims. The optometry apparatus according to claim 7, wherein the predetermined angle is approximately 8 degrees. 7. A first rotation mechanism for changing an angle in the vertical direction of the optical axis of the correction optical system with respect to the optical axis of the visual target presenting optical system is included. 7. The optometry apparatus according to item. The optical axis of the correction optical system is inclined outward by a predetermined angle toward the display unit with respect to the optical axis of the visual target presenting optical system. The optometry apparatus according to any one of the above. 10. A second rotation mechanism for changing a left-right angle of the optical axis of the correction optical system with respect to the optical axis of the visual target presenting optical system is included. 10. The optometry apparatus according to item.

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