Subjective optometry device and subjective optometry program

Abstract

To provide a subjective ophthalmic device and a subjective ophthalmic program which can easily prepare a spectacle lens.SOLUTION: A subjective ophthalmic device which includes correction means that changes optical characteristics of a target light flux emitted from target presentation means and subjectively measures the optical characteristics of a subject eye, comprises: storage means which stores a parameter of correction means according to a presentation distance of a target to be presented to the subject eye in association with each type of a plurality of spectacle lenses; lens selection means which selects a type of a prescribed spectacle lens from the types of the plurality of spectacle lenses; and control means which calls the parameter associated with the type of the prescribed spectacle lens from the storage means on the basis of the type of the prescribed spectacle lens selected by the lens selection means, and sets the correction means on the basis of the called parameter, and a subjective measurement result acquired by the subjective ophthalmic device.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to a subjective optometry apparatus that subjectively measures optical characteristics of an eye to be examined, and a subjective optometry program executed in the subjective optometry apparatus. [Background Art]

[0002] A subjective optometry apparatus is known that measures optical characteristics of an eye to be examined by disposing an optical member in front of the subject's eye and presenting an examination visual target to the eye to be examined through the optical member (see Patent Document 1). For example, such a subjective optometry apparatus can be used to appropriately adjust a correction amount for correcting the eye to be examined. [Prior Art Document] [Patent Document]

[0003] [Patent Document 1] Japanese Unexamined Patent Publication No. 2020-18712 [Summary of the Invention] [Problem to be Solved by the Invention]

[0004] When a subject manufactures eyeglasses, the type of eyeglass lens is selected according to the intended use of the eyeglasses, and the power of the eyeglass lens is determined based on the correction amount for the eye to be examined.

[0005] By the way, the types of eyeglass lenses have increased in recent years. In particular, for progressive lenses, many lineups may be prepared, such as far-near bifocal lenses, intermediate-far bifocal lenses, near-near bifocal lenses, and the like. An examiner and the subject select a type of eyeglass lens that is considered preferable for the subject, but it is difficult to grasp the difference in visual appearance depending on the type of eyeglass lens, and it has not been easy to select an optimal eyeglass lens.

[0006] In view of the above prior art, it is a technical object of the present disclosure to provide a subjective optometry apparatus and a subjective optometry program that can easily prescribe an eyeglass lens. [Means for solving the problem]

[0007] To solve the above problems, the present invention is characterized by having the following configuration. (1) A subjective ophthalmoscopic device according to a first aspect of the present disclosure has a corrective means for changing the optical properties of a target light beam emitted from a target presentation means, and is a subjective ophthalmoscopic device for subjectively measuring the optical properties of the eye to be examined, wherein the target presented to the eye to be examined is multiple Parameters of the correction means according to the presentation distance and a parameter that takes into account the addition degree of the eye being examined. of, Includes progressive lenses Correspondence between multiple types of eyeglass lenses Table or formula A storage means for storing information, and a lens selection means for selecting a predetermined type of eyeglass lens from the plurality of eyeglass lens types, For each of the aforementioned multiple types of spectacle lenses, a setting means for setting the multiple presentation distances as the presentation distance of the visual target, and a distance selection means for selecting a predetermined presentation distance from the multiple presentation distances set by the setting means, The lens selection means selects the type of predetermined spectacle lens The distance selection means selects the predetermined presentation distance, Based on the predetermined type of eyeglass lens, and the table or calculation formula corresponding to the predetermined presentation distance. retrieve from the storage means, The parameter in the table or the calculation formula and obtained by the aforementioned subjective optometry device. at least includes the degree of participation. The invention is characterized by comprising a control means for setting the corrective means based on the subjective measurement results. (2) A subjective eye examination program according to a second aspect of the present disclosure includes a corrective means for changing the optical properties of a target light beam emitted from a target presentation means, covered Visual targets presented during eye examinations multiple Parameters of the correction means according to the presentation distance and a parameter that takes into account the addition degree of the eye being examined. of, Includes progressive lenses Correspondence between multiple types of eyeglass lenses Table or formula Having a memory means for storing memories, The aforementioned A subjective optometry program for use in a subjective optometry device for subjectively measuring the optical properties of the eye under examination, comprising a selection step, which is executed by the processor of the subjective optometry device, to select a predetermined type of spectacle lens from a plurality of spectacle lens types, A setting step to set a plurality of presentation distances as the presentation distance of the visual target for each of the plurality of types of eyeglass lenses, and a distance selection step to select a predetermined presentation distance from the plurality of presentation distances set in the setting step. The type of predetermined eyeglass lens selected in the selection step And, the predetermined presentation distance selected in the distance selection step, Based on the predetermined type of eyeglass lens, and the table or calculation formula corresponding to the predetermined presentation distance. retrieve from the storage means, The parameter in the table or the calculation formulaand obtained by said subjective optometry apparatus at least includes the degree of participation. a control step of setting said correction means based on a subjective measurement result; and characterized by comprising the step. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] [Figure 1] It is an external view of a subjective optometry apparatus. [Figure 2] It is a schematic diagram of a light projection optical system. [Figure 3] It is a schematic diagram of an eye refractive power measurement unit. [Figure 4] It is a schematic diagram of a control system. [Figure 5] It is an example of a correspondence table showing the relationship between types of spectacle lenses, presentation distances of visual targets, and correction amounts of an eye to be examined. [Figure 6] It is an example of an operation screen of an examiner's controller. [Figure 7] It is an example of a correspondence table including an intermediate distance as the presentation distance of a visual target. MODE FOR CARRYING OUT THE INVENTION

[0009] <Outline> An outline of the subjective optometry apparatus according to the present embodiment will be described. Items classified by the following <> can be used independently or in association with each other.

[0010] The subjective optometry apparatus of the present embodiment is an apparatus for subjectively measuring optical characteristics of an eye to be examined. For example, the optical characteristics of the eye to be examined may be at least one of eye refractive power (as an example, at least any one of spherical power, cylindrical power, astigmatic axis angle, etc.), binocular vision function (as an example, at least any one of prism power, stereoscopic vision function, etc.), contrast sensitivity, or the like.

[0011] <Visual target presenting means> The subjective optometry apparatus of the present embodiment may comprise an optotype presenting means. The optotype presenting means presents an optotype to an eye to be examined. For example, the optotype presenting means may be a display (e.g., display 31). Further, for example, the optotype presenting means may be a light source and an optotype plate. Further, for example, the optotype presenting means may be a light source and a DMD (Digital Micromirror Device). Further, for example, the optotype presenting means may be a light field display. Note that a light field display is a display capable of reproducing light rays emitted by an object by emitting different light for each direction from each pixel set unit. In other words, the light field display can reproduce reflected light from an object or a light source corresponding to a viewing position.

[0012] <Correction means> The subjective optometry apparatus of the present embodiment may comprise a correction means. The correction means changes the optical characteristics of the optotype light flux emitted from the optotype presenting means. For example, the optotype light flux from the optotype presenting means may be guided toward the eye to be examined via a light projection optical system (e.g., light projection optical system 30). For example, the light projection optical system may have at least one optical member for passing the optotype light flux emitted from the optotype presenting means. As an example, it may have at least any one of a lens, a mirror, and the like.

[0013] For example, the correction means only needs to have a configuration capable of changing the optical characteristics of the optotype light flux.

[0014] For example, the correction means may have an optical member. For example, the optical member may be at least any one of a spherical lens, a cylindrical lens, a variable focus lens, a cross cylinder lens, a rotary prism, a wavefront modulation element, and the like. Of course, the optical member may be different from these. Further, for example, the correction means may have a driving means that drives the optical member. In this case, the optical characteristics of the optotype light flux are changed by controlling the driving means that drives the optical member.

[0015] Furthermore, for example, the corrective means may have a configuration for optically changing the presentation position (presentation distance) of the target to the eye under examination. For example, it may have a configuration for moving the target presentation means in the optical axis direction, or a configuration for moving an optical element in the optical path (e.g., a spherical lens) in the optical axis direction. Also, for example, the corrective means may have a driving means for moving the target presentation means in the optical axis direction. Also, for example, the corrective means may have a driving means for moving an optical element in the optical path in the optical axis direction. In this case, the optical properties of the target light beam are changed by controlling the driving means for moving at least one of the target presentation means and the optical element.

[0016] Furthermore, the corrective means may also be an ocular refractive power measuring unit (e.g., ocular refractive power measuring unit 40) that switches and positions optical members (e.g., optical elements 52) in front of the eye under examination via an examination window (e.g., examination window 43). For example, the ocular refractive power measuring unit may have a lens disc (e.g., lens disc 50) in which multiple optical elements are arranged on the same circumference. In this case, the optical characteristics of the target light beam are changed by controlling a driving means (e.g., drive unit 51, drive unit 53, etc.) for controlling the lens disc.

[0017] The corrective means may have a different configuration than those described above. For example, when using a light field display as a target presentation means, the presentation distance of the object (for example, the target) reproduced by the light field display may be changed.

[0018] <Storage means> The subjective eye examination device of this embodiment may include a storage means (for example, memory 70). The storage means stores parameters of the corrective means corresponding to the presentation distance of the visual target presented to the eye under examination, associated with each of several types of spectacle lenses. For example, the storage means may store a table that associates the parameters of the corrective means corresponding to the presentation distance of the visual target with each of several types of spectacle lenses. Alternatively, for example, the storage means may store calculation formulas that associate the parameters of the corrective means corresponding to the presentation distance of the visual target with each of several types of spectacle lenses.

[0019] For example, the parameters of the corrective means may be parameters set to change the optical properties of the target light beam by the corrective means. For example, the parameters of the corrective means may be the amount of change in the optical properties of the target light beam by the corrective means. Alternatively, for example, the parameters of the corrective means may be parameters relating to the amount of change in the optical properties of the target light beam based on the subjective measurement results of the eye being examined. For example, these changes in the target light beam may be the amount of change in the refractive power of the target light beam (at least one of spherical refractive power, cylindrical refractive power, and astigmatism axis angle). In other words, they may be the amount of correction for correcting the eye being examined (at least one of spherical correction amount, cylindrical correction amount, and astigmatism axis correction amount).

[0020] For example, the parameters of the corrective device may be parameters corresponding to one presentation distance of the target. Alternatively, for example, the parameters of the corrective device may be parameters corresponding to multiple presentation distances of the target. For example, the presentation distance of the target may be at least one of the following: distance (e.g., 5m), intermediate distance (e.g., 2.0m), and near distance (e.g., 40cm).

[0021] Furthermore, for example, the distance for presenting the target may include multiple distances. For example, 5m and 4m. Also, for example, the intermediate distance for presenting the target may include multiple intermediate distances. For example, 2.0m and 1m. Also, for example, the near distance for presenting the target may include multiple near distances. For example, 80cm and 40cm.

[0022] For example, the parameters of the corrective means may be associated with at least one of several types of spectacle lenses, such as single-vision lenses, bifocal lenses, and progressive lenses. For example, the several types of spectacle lenses may include several progressive lenses, and the parameters of the corrective means may be associated with several progressive lenses. In this case, the several progressive lenses may be at least one of bifocal lenses, intermediate-near-vision lenses, and near-near-vision lenses. For example, progressive lenses have a wider range of options than single-vision lenses, and their characteristics vary, including bifocal lenses, intermediate-near-vision lenses, and near-near-vision lenses. Therefore, by associating the parameters of the corrective means with several progressive lenses, it is possible to set parameters appropriately to suit the subject.

[0023] For example, the storage means may store the parameters of the corrective means in association with each of the multiple presentation distances set by the setting means described later. That is, for each of the multiple types of eyeglass lenses, the parameters of the corrective means corresponding to the multiple presentation distances set in the setting means may be stored in association with each other.

[0024] For example, the memory means may store parameters based on the presentation distance of the visual target presented to the eye under examination, the type of spectacle lens, and the subjective measurement results of the eye under examination. In other words, parameters that take into account the subjective measurement results of the eye under examination may be stored as parameters of the corrective means. As an example, parameters that take into account at least one of the following of the eye under examination—spherical refractive power, cylindrical refractive power, astigmatism axis angle, add power, etc.—may be stored. Of course, parameters that combine these may also be stored.

[0025] For example, if the memory means stores parameters that take subjective measurement results into account as parameters of the corrective means, it may also store the refractive power of the eye being examined as parameters of the corrective means. Alternatively, if the memory means stores parameters that take subjective measurement results into account as parameters of the corrective means, it may also store the sum of the refractive powers of the eye being examined as parameters of the corrective means.

[0026] Furthermore, for example, if the presentation distance of the visual target presented to the eye under examination is the near-vision distance and the type of spectacle lens is a progressive lens, the memory means may store parameters that take into account the add power as parameters of the corrective means. More specifically, for example, the sum of the spherical refractive power and the add power may be stored as parameters of the corrective means. This makes it easy to reproduce how the visual target appears at the near-vision distance for each type of spectacle lens.

[0027] <Lens selection method> The subjective eye examination device of this embodiment may include a lens selection means (for example, a control unit 60). The lens selection means selects a predetermined type of spectacle lens from a plurality of spectacle lens types. For example, the lens selection means may be able to select at least one of the following as the predetermined type of spectacle lens: single-vision lenses, bifocal lenses, progressive lenses, etc. Also, for example, the lens selection means may be able to select at least one of the following as the type of progressive lens: bifocal lenses, intermediate-distance lenses, near-distance lenses, etc.

[0028] For example, the lens selection means may select any type of spectacle lens input by the operator's operation means (e.g., the operator's controller 10). Alternatively, the lens selection means may automatically select the type of spectacle lens stored in the electronic data by receiving electronic data for each subject. Alternatively, the lens selection means may automatically select the type of spectacle lens stored in the identifier by reading the identifier for each subject. As an example, the identifier may be an ID, a string, a one-dimensional code, a two-dimensional code, a color code, etc.

[0029] <Control means> The subjective eye examination device of this embodiment may include a control means (for example, a control unit 60). The control means retrieves parameters associated with a predetermined type of spectacle lens from a storage means based on the type of spectacle lens selected by the lens selection means, and sets the correction means based on the retrieved parameters and the subjective measurement results obtained by the subjective eye examination device. For example, this makes it possible to compare how things look with different types of spectacle lenses, making it easier to prescribe the optimal spectacle lens for the subject.

[0030] For example, the control means may set the correction means by controlling the drive of the optical member in the correction means based on parameters retrieved from the memory means. As an example, the control means may change the optical properties (refractive power, etc.) of the target light beam to predetermined optical properties by controlling the drive of the optical member in the correction means based on parameters and subjective measurement results. Alternatively, for example, the control means may set the correction means by controlling the drive of the target presentation means in the correction means based on parameters retrieved from the memory means. As an example, the control means may change the optical properties (refractive power, etc.) of the target light beam to predetermined optical properties by controlling the drive of the target presentation means in the correction means based on parameters and subjective measurement results.

[0031] For example, the control means may retrieve parameters from the storage means for a predetermined presentation distance associated with a predetermined type of spectacle lens, based on a predetermined type of spectacle lens selected by the lens selection means and a predetermined presentation distance selected by the distance selection means described later, and then set the correction means. For example, the control means may retrieve parameters from the storage means for a combination of a predetermined type of spectacle lens and a predetermined presentation distance, among the parameters of the correction means corresponding to the presentation distance of the visual target associated with each type of spectacle lens, and then set the correction means. This makes it possible to compare how things look depending on the difference between the type of spectacle lens and the presentation distance of the visual target.

[0032] Furthermore, for example, the subjective measurement result obtained by the subjective optometry device may be the value of the corrected refractive power that is closest to positive and yields the best visual acuity of the eye being examined (i.e., the fully corrected value). Alternatively, for example, the subjective measurement result obtained by the subjective optometry device may be the corrected value that yields a predetermined visual acuity of the eye being examined, and may be the corrected value used when prescribing eyeglasses (i.e., the final prescription value). Furthermore, the subjective measurement result obtained using the subjective optometry device may include at least the add power of the eye being examined. For example, if the presentation distance of the target presented to the eye being examined is the near-vision distance and the type of eyeglass lens is a progressive lens, the control means may retrieve parameters that take the add power into consideration from the storage means and set the correction means.

[0033] <Setting method> The subjective eye examination device of this embodiment may include setting means (for example, a control unit 60). The setting means sets a plurality of presentation distances as the presentation distance of the visual target for each of the plurality of types of spectacle lenses. For example, the plurality of presentation distances may be at least one of distance distance, intermediate distance, and near distance. Of course, for example, the plurality of presentation distances may include at least one of a plurality of distance distances, a plurality of intermediate distances, and a plurality of near distances.

[0034] <Means of distance selection> The subjective optometry device of this embodiment may include distance selection means (for example, a control unit 60). The distance selection means selects a predetermined presentation distance from a plurality of presentation distances set by the setting means. For example, the distance selection means may be able to select at least one of the following as the predetermined presentation distance: distance, intermediate distance, near distance, etc.

[0035] For example, the distance selection means may select a predetermined presentation distance input by the operator using an operating means (e.g., an operator controller 10). Alternatively, for example, the distance selection means may automatically select a predetermined presentation distance based on the type of spectacle lenses stored in the electronic data by receiving electronic data for each subject. Alternatively, for example, the distance selection means may automatically select a predetermined presentation distance based on the type of spectacle lenses stored in the identifier by reading an identifier for each subject.

[0036] This disclosure is not limited to the apparatus described in this embodiment. For example, terminal control software (program) that performs the functions of the above embodiment can be supplied to the apparatus or system via a network or various storage media, and the control device (e.g., CPU) of the apparatus or system can read and execute the program.

[0037] <Examples> An embodiment of a subjective eye examination device according to this embodiment will be described.

[0038] Figure 1 is an external view of the subjective optometry device 100. Figure 1(a) shows the refractive power measurement unit 40 supported in the standby position. Figure 1(b) shows the refractive power measurement unit 40 supported in the measurement position. For example, the subjective optometry device 100 includes a housing 1, a display window 2, a speaker 3, a holding unit 4, an examiner controller 10, an refractive power measurement unit 40, etc.

[0039] The housing 1 has a light projection optical system 30 inside. The presentation window 2 transmits the target light beam from the light projection optical system 30. The target light beam is projected onto the eye E being examined via the presentation window 2. If the refractive power measurement unit 40 is placed between the eye E being examined and the presentation window 2 (see Figure 1(b)), the target light beam is projected onto the eye E being examined via the presentation window 2 and the examination window 43 described later. In this way, the examination target is presented to the eye E being examined. The speaker 3 outputs voice guidance, etc.

[0040] The holding unit 4 holds the eye refractive power measurement unit 40. For example, the holding unit 4 moves the eye refractive power measurement unit 40 connected to the arm by moving the arm driven by a drive unit (motor, etc.) not shown. This switches the eye refractive power measurement unit 40 between the standby position and the measurement position.

[0041] The examiner controller 10 is used by the examiner to operate the subjective ophthalmoscopic examination device 100. The examiner controller 10 includes a switch unit 11, a monitor 12, etc. The switch unit 11 receives signals for various settings (e.g., movement of the ocular refractive power measurement unit 40, etc.). The monitor 12 displays various information (e.g., measurement results of the eye under examination E, etc.). The monitor 12 may also function as a touch panel that also serves as the switch unit 11. Signals from the examiner controller 10 are output to the control unit 60 via wired or wireless communication.

[0042] <Floodlight Optics> Figure 2 is a schematic diagram of the light projection optical system 30. Figure 2(a) shows the optical arrangement during distance vision testing. Figure 2(b) shows the optical arrangement during near vision testing. The light projection optical system 30 projects a target light beam toward the eye E under examination. For example, the light projection optical system 30 includes a display 31, a planar mirror 32, a concave mirror 33, a distance / near switching unit 34, etc.

[0043] The display 31 displays a visual target (e.g., a fixation target, a test target, etc.). The visual target is presented to the eye E when the light beam emitted from the display 31 forms an image on the fundus of the eye E being examined. For example, the display 31 may be an LCD (Liquid Crystal Display), an organic EL (Electro Luminescence), a plasma display, etc.

[0044] The planar mirror 32 reflects the target light beam from the display 31 and guides it to the concave mirror 33. The planar mirror 32 also reflects the target light beam from the display 31 and guides it to the eye under examination E. For example, during near vision testing of the eye under examination E, the planar mirror 32 is positioned so that the distance from the eye under examination E to the display 31 (presentation distance) is optically 40 cm. It is also possible to use reflective materials such as prisms, beam splitters, or half mirrors instead of the planar mirror 32.

[0045] The concave mirror 33 reflects the target light beam from the display 31 and guides it to the planar mirror 32. For example, the concave mirror 33 is positioned so that the distance from the eye E to the display 31 (presentation distance) is optically 5m during distance vision testing of the eye E. It is also possible to use reflective materials such as aspherical mirrors or free-form mirrors instead of the concave mirror 33. Furthermore, it is also possible to use lenses or the like instead of the concave mirror 33.

[0046] The distance / near switching unit 34 switches the arrangement of the display 31 during distance vision testing and near vision testing of the eye being examined E. For example, the distance / near switching unit 34 moves the display 31 held in the holder by moving the holder through the drive of a drive unit (motor, etc.) not shown. This switches the distance vision arrangement and near vision arrangement of the display 31.

[0047] For example, during distance vision testing of the eye under examination E, the display screen of the display 31 is directed towards the back of the housing 1 (see Figure 2(a)). The target light beam from the display 31 enters the planar mirror 32 through the optical axis L1 and is reflected by the planar mirror 32 in the direction of the optical axis L2. It also enters the concave mirror 33 through the optical axis L2 and is reflected by the concave mirror 33 in the direction of the optical axis L3. Furthermore, it enters the planar mirror 32 through the optical axis L3 and is reflected by the planar mirror 32 in the direction of the optical axis L4. As a result, the target light beam, which has passed through each optical component inside the housing 1 and is emitted to the outside of the housing 1, is projected onto the eye under examination E.

[0048] For example, during a near vision test of the eye under examination E, the display screen of the display 31 is directed towards the top surface of the housing 1 (see Figure 2(b)). The target light beam from the display 31 enters the plane mirror 32 passing through the optical axis L3 and is reflected by the plane mirror 32 in the direction of the optical axis L4. As a result, the target light beam, which has passed through each optical component inside the housing 1 and exited to the outside of the housing 1, is projected onto the eye under examination E.

[0049] <Ocular refractive power measurement unit (corrective optical system)> Figure 3 is a schematic diagram of the eye refractive power measurement unit 40. The eye refractive power measurement unit 40 subjectively measures the refractive power of the eye E being examined. The eye refractive power measurement unit 40 is also used as a corrective optical system. The corrective optical system is placed in the optical path of the light projection optical system 30 and changes the optical properties of the target light beam. For example, the eye refractive power measurement unit 40 includes a forehead rest 41, a lens unit 42, an examination window 43, a moving unit 44, etc.

[0050] The forehead rest 41 fixes the eye E to a predetermined examination position by pressing it against the subject's head, and maintains a constant distance from the eye E to the examination window 43. The lens unit 42 has a pair of left and right lens units 42L and 42R. The lens unit 42 has an examination window 43 (left examination window 43L and right examination window 43R).

[0051] The moving unit 44 adjusts the distance between the left lens unit 42L and the right lens unit 42R, and the convergence angle (inward angle) between the left lens unit 42L and the right lens unit 42R. For example, the moving unit 44 adjusts the distance between the left lens unit 42L and the right lens unit 42R by driving the drive unit 45 (left drive unit 45L and right drive unit 45R). Also, for example, the moving unit 44 adjusts the convergence angle between the left lens unit 42L and the right lens unit 42R by driving the drive unit 46. For detailed configuration of the moving unit 44, please refer to, for example, Japanese Patent Application Publication No. 2004-329345.

[0052] The lens unit 42 includes a lens disc 50 inside. The lens disc 50 has a pair of left and right lens discs: a left lens disc 50L and a right lens disc 50R. The lens disc 50 is rotated by the drive of the drive unit 51 (left drive unit 51L and right drive unit 51R). Furthermore, the lens disc 50 has an aperture (or a 0D lens) and multiple optical elements 52 (left optical element 52L and right optical element 52R) arranged on the same circumference. These optical elements are rotated by the drive unit 53 (left drive unit 53L and right drive unit 53R). This allows the desired optical element 52 to be switched and positioned in the inspection window 43 at the desired angle.

[0053] The lens disc 50 consists of one lens disc or multiple lens discs. For example, a spherical lens disc, a cylindrical lens disc, an auxiliary lens disc, etc., may be provided. For example, a spherical lens disc may have multiple spherical lenses with different spherical powers (spherical refractive powers). For example, a cylindrical lens disc may have multiple cylindrical lenses with different cylindrical powers (cylindrical refractive powers). For example, an auxiliary lens disc may have a shielding plate, a polarizing filter, a red filter / green filter, a dispersion prism, a Maddox lens, a rotary prism, a cross cylinder lens, an auto cross cylinder lens, an alignment lens, etc. A drive unit 51 and a drive unit 53 may be provided for each lens disc.

[0054] The refractive power measurement unit 40 only needs to be capable of changing the optical properties of the target light beam. For example, it may be configured to control an optical element, as in this embodiment. Alternatively, it may be configured to control a wavefront modulation element, for example.

[0055] <Department Head> Figure 4 is a schematic diagram of the control system of the subjective optometry device 100. For example, the control unit 60 includes a CPU (processor), RAM, ROM, etc. The CPU controls the operation of each part of the subjective optometry device 100. Various types of information are temporarily stored in the RAM. Various programs executed by the CPU are stored in the ROM. Note that the control unit 60 may be composed of multiple control units (i.e., multiple processors).

[0056] The control unit 60 is connected to the speaker 3, display 31, examiner controller 10, non-volatile memory 70 (hereinafter referred to as memory 70), etc. The control unit 60 is also connected to the drive unit of the holding unit 4, the drive unit of the near / far switching unit 34, the drive unit of the refractive power measurement unit 40 (drive units 45, 46, 51, 53), etc.

[0057] Memory 70 is a non-transient storage medium that can retain its contents even when the power supply is cut off. For example, memory 70 can be a hard disk drive, flash ROM, USB memory, etc.

[0058] <Control operation> The control operation of the subjective optometry device 100 will be explained.

[0059] The examiner adjusts the position of the forehead rest 170 by operating a forehead rest adjustment knob (not shown) so that the corneal vertex distance VD of the eye under examination E is a predetermined distance (for example, 12 mm). The examiner also operates the examiner controller 10 to input the interpupillary distance of the eye under examination. The control unit 60 adjusts the spacing of the lens units 42 to align the examination window 43 with the interpupillary distance.

[0060] <Self-Assessment Test> The examiner operates the examiner controller 10 to input the objective refractive power (objective value) of the eye under examination E, which was previously obtained through objective measurement, as the initial correction amount for the eye under examination E. That is, the initial spherical correction amount, the initial cylindrical correction amount, and the initial astigmatism axis correction amount are input. The control unit 60 controls the lens disk 50 and the optical elements 52 of the lens disk 50 based on the initial correction amount. As a result, the refractive power of the eye under examination E is corrected to 0D (i.e., so that the target light beam from the display 31 is focused onto the retina of the eye under examination E).

[0061] After correcting the eye E to the initial correction amount, the examiner operates the examiner controller 10 to start the distance visual acuity test for the eye E. The control unit 60 switches the display 31 to a distance viewing configuration. The control unit 60 also displays a Landolt ring target with a predetermined visual acuity value on the display 31 as the initial target.

[0062] The examiner operates the examiner controller 10 to switch between Landolt ring targets and ask the subject about the direction of the gap in the Landolt ring target. For example, if the subject's answer is correct, the visual acuity value of the Landolt ring target is switched to one level higher. That is, the increment of the visual acuity value of the Landolt ring target is increased by one, switching to a value larger than the current value. For example, if the subject's answer is incorrect, the visual acuity value of the Landolt ring target is switched to one level lower. That is, the increment of the visual acuity value of the Landolt ring target is decreased by one, switching to a value smaller than the current value. The examiner repeats these steps to find the highest visual acuity value of the Landolt ring target that the subject's eye E can read.

[0063] Next, the examiner operates the examiner controller 10 to switch the correction amount for the eye E under examination, while asking the subject about the direction of the gap in the Landolt ring target. For example, if the subject's answer is correct, the spherical correction amount is switched to one step weaker. That is, the spherical correction amount is decreased by one step, to a value smaller than the current value. For example, if the subject's answer is incorrect, the spherical correction amount is switched to one step stronger. That is, the spherical correction amount is increased by one step, to a value larger than the current value. The examiner repeats these steps to determine the value of the corrected refractive power that is closest to positive (i.e., the full correction value) that yields the best visual acuity for the eye E under examination.

[0064] After completing the distance visual acuity test of the eye E under examination, the examiner operates the examiner controller 10 to start the add power test with the eye E corrected to the fully corrected value at the distance test distance. For example, the examiner determines the need for add power and sets the initial add power based on at least one of the following: the age of the subject, the accommodative power of the eye E, the refractive power of the eye E, etc. Of course, the control unit 60 may automatically determine and set the need for add power and the initial add power. The control unit 60 switches the display 31 to a near-vision configuration and controls the lens disc 50 based on the initial add power. The control unit 60 also displays a cross grid target on the display 31.

[0065] The examiner asks the subject how they see the cross grid target and adjusts the add power according to the subject's response. For example, if the subject responds that "the horizontal lines appear darker," the add power is increased by one step. In other words, the add power is increased by one step, to a value larger than the current value. For example, if the subject responds that "the vertical lines appear darker," the add power is decreased by one step. In other words, the add power is decreased by one step, to a value smaller than the current value. The examiner repeats this procedure until the vertical and horizontal lines of the cross grid target appear equally clear, which is determined to be the appropriate add power for the subject's eye E.

[0066] This allows the examiner to obtain the full corrected value and add power of the eye E being examined. Alternatively, the examiner may adjust the full corrected value of the eye E being examined to the corrected value that will produce the desired visual acuity for the eye E and will be used when prescribing eyeglasses, thereby obtaining the final prescribed value and add power of the eye E being examined.

[0067] <Checking how vision changes depending on the type of eyeglass lens and the presentation distance of the target> In this embodiment, the subjective optometry device 100 is used to allow the subject to confirm how they see things according to the type of spectacle lens and the presentation distance of the visual target. In other words, the subject can simulate the experience of actually seeing things at predetermined presentation distances (e.g., distance, intermediate, near, etc.) while wearing spectacle lenses (e.g., single-vision lenses, progressive lenses, etc.).

[0068] For example, in this embodiment, such a simulation is performed based on the fully corrected or prescribed value of the eye under examination E, the type of spectacle lens, and the presentation distance of the visual target. Below, this will be explained in detail using the case where the prescribed value of the eye under examination E is used as an example.

[0069] In this embodiment, for each type of spectacle lens worn by the subject, a corresponding amount of correction (i.e., the amount of change in the optical properties of the target light beam emitted from the display 31) is associated with the presentation distance of the target presented to the subject eye E. For example, the relationship between the type of spectacle lens, the presentation distance of the target, and the amount of correction for the subject eye E is stored in the memory 70 as a correspondence table 80.

[0070] Figure 5 shows an example of the correspondence table 80. In this embodiment, the following five types of eyeglass lenses are available. For example, eyeglass lens type 81 includes single-vision lenses and progressive lenses. For example, single-vision lenses are divided into those worn to improve distance vision and those worn to improve near vision. For example, progressive lenses are divided into bifocal lenses, intermediate-distance lenses, and near-distance lenses.

[0071] Furthermore, in this embodiment, two target presentation distances are provided. For example, the target presentation distance 82 includes a distance distance and a near distance. For example, the distance distance is 5 m optically away from the eye E being examined, and corresponds to the distance setting of the display 31. For example, the near distance is 40 cm optically away from the eye E being examined, and corresponds to the near setting of the display 31.

[0072] In this embodiment, for each type of spectacle lens 81, a formula for calculating the amount of correction 83 (i.e., the amount of change 83 that changes the spherical refractive power of the target light beam) used to correct the eye E by the optical element 52, according to the presentation distance 82 of the target, is associated. For example, a formula for calculating the amount of correction 83 is associated based on the prescribed value of the spherical correction amount (hereinafter referred to as the spherical prescription value) and the prescribed value of the add power (hereinafter referred to as the prescribed add power) obtained in the subjective examination of the eye E. Of course, formulas for calculating the prescribed value of the cylindrical correction amount (cylindrical prescription value), the prescribed value of the astigmatism axis correction amount (astigmatism axis prescription value), etc., obtained in the subjective examination of the eye E may also be associated.

[0073] For example, in correspondence table 80, when using a single-vision lens to improve distance vision, the spherical prescription value (Sph) is set as a corrective amount of 83, regardless of the target presentation distance. Also, when using a single-vision lens to improve near vision, the sum of the spherical prescription value (Sph) and the prescription add power (Add) is set as a corrective amount of 83, regardless of the target presentation distance. Furthermore, as an example, if the progressive lens is a bifocal lens, the spherical prescription value (Sph) is set as a corrective amount of 83 at the distance vision distance. Also, if the progressive lens is a progressive lens for intermediate and near vision, the sum of the spherical prescription value (Sph) and a predetermined value (α) is set as a corrective amount of 83 at the distance vision distance. Furthermore, if the progressive lens is a near-vision lens, the sum of the spherical prescription value (Sph) and the prescription add power (Add), minus a predetermined value (β), is set as a corrective amount of 83 at the distance vision distance. For bifocal, intermediate-distance, and near-distance lenses, the corrective amount for near vision is set to 83, which is the sum of the spherical prescription value (Sph) and the prescription add power (Add).

[0074] The predetermined value α mentioned above may be a fixed value based on the presentation distance of the target for distance vision and the typical intermediate distance designed for progressive lenses. For example, if the presentation distance of the target for distance vision is 5m and the intermediate distance designed for progressive lenses is 3m, then 0.5D, which corresponds to the difference between these (i.e., 2m), may be set as the predetermined value α. Similarly, the predetermined value β mentioned above may be a fixed value based on the typical near vision distance designed for near-vision lenses. For example, if the near vision distance designed for near-vision lenses is 1m, then 1.0D, which corresponds to 1m, may be set as the predetermined value β.

[0075] Figure 6 shows an example of the operation screen 90 of the examiner controller 10. For example, the operation screen 90 displays multiple lens selection buttons 91 for selecting the type of spectacle lens, multiple distance selection buttons 92 for selecting the presentation distance of the visual target, the examination results 93 of the eye under examination, etc. For example, the multiple lens selection buttons 91 may include a button indicating distance wear for monofocal lenses, a button indicating near wear for monofocal lenses, a button indicating bifocal lenses, a button indicating intermediate-near lenses, a button indicating near-near lenses, etc. For example, the multiple distance selection buttons 92 may include a button indicating distance distance, a button indicating near distance, etc. For example, the examination results 93 of the eye under examination may display objective values ​​and subjective values ​​(e.g., fully corrected value, prescription value, etc.) of the eye under examination E in a switchable manner. Here, we will use the example where the prescription values ​​for eye E have been selected, and the right and left eyes have a spherical prescription value of -6.50D, a cylindrical prescription value of -1.25D, an astigmatism axis prescription value of 30 degrees, and a prescription add power of +3.00D, respectively.

[0076] The examiner operates the examiner controller 10 to select the type of spectacle lenses to be worn by the subject and the presentation distance of the visual target. For example, the examiner selects a button (the "Single Distance" button in Figure 6) from among several lens selection buttons 91 to indicate a single-vision lens to be worn to improve distance vision. The examiner also selects a button (the "Distance" button in Figure 6) from among several distance selection buttons 92 to indicate the distance vision distance. The control unit 60 controls a drive unit (not shown) of the distance switching unit 34 in response to the operation signal from the examiner controller 10 and switches the display 31 to the distance vision configuration. The control unit 60 also retrieves the formula for calculating the correction amount 83 at the distance vision distance associated with the single-vision lens from the correspondence table 80 and calculates the correction amount (spherical correction amount) based on this formula. The control unit 60 also controls the lens disk 50 and places a spherical lens corresponding to the calculated spherical correction amount in the examination window 43.

[0077] In this embodiment, since the spherical prescription value of the eye E under examination is -6.50D, the correction amount 83 is calculated to be the same as the spherical prescription value, -6.50D, based on the correspondence table 80. The control unit 60 drives the drive unit 51 to rotate the spherical lens disc and places the -6.50D spherical lens in the examination window 43. In this embodiment, since the cylindrical prescription value of the eye E under examination is -1.25D and the astigmatism axis prescription value is 30 degrees, the control unit 60 drives the drive unit 51 to rotate the cylindrical lens disc and drives the drive unit 53 to rotate the optical element 52, thereby placing the -1.25D cylindrical lens in the examination window 43 at an angle of 30 degrees.

[0078] By viewing the display 31 through the examination window 43 with the subject's eye E corrected in this way, the subject can experience what it would be like to see a target 5 meters away while wearing a monofocal lens.

[0079] The examiner may further operate the examiner controller 10 to select the button indicating the near-vision distance (the "near-vision" button in Figure 6) from among the multiple distance selection buttons 92. The control unit 60 switches the display 31 to the near-vision configuration in response to the operation signal from the examiner controller 10. Since the correction amount 83 at the far-vision distance and the correction amount 83 at the near-vision distance associated with the single-focus lens are the same, the configuration of the -6.50D spherical lens is maintained.

[0080] By viewing the display 31 through the examination window 43 with the subject's eye E corrected in this way, the subject can experience what it would be like to see a target 40 cm away while wearing a monofocal lens.

[0081] For example, by selecting a single-vision lens as the type of eyeglass lens and switching the presentation distance of the visual target between distance and near vision distances, the subject can simulate how they would see with a single-vision lens.

[0082] Next, for example, the examiner selects a button indicating a bifocal lens, which is one of the progressive lenses, from among several lens selection buttons 91 (the "bifocal" button in Figure 6). The examiner also selects a button indicating the distance distance from among several distance selection buttons 92. The control unit 60 switches the display 31 to the distance setting. The control unit 60 also calculates the correction amount (spherical correction amount) based on the calculation formula for the correction amount 83 at the distance distance associated with the bifocal lens, and places the predetermined spherical lens in the examination window 43. In this embodiment, since the spherical prescription value of the eye E under examination is -6.50D, based on the correspondence table 80, the same as the spherical prescription value, -6.50D, is calculated as the correction amount 83, and a spherical lens of -6.50D is placed in the examination window 43.

[0083] By viewing the display 31 through the examination window 43 with the subject's eye E corrected in this way, the subject can experience what it would be like to wear bifocal lenses and view a target 5 meters away.

[0084] The examiner may further operate the examiner controller 10 to select a button indicating the near vision distance from among the multiple distance selection buttons 92. The control unit 60 switches the display 31 to the near vision configuration. The control unit 60 also calculates the correction amount (spherical correction amount) based on the calculation formula for the correction amount 83 at the near vision distance associated with the bifocal lens, and places the predetermined spherical lens in the examination window 43. In this embodiment, based on the correspondence table 80, the correction amount 83 is calculated as -3.50D, which is the sum of the spherical prescription value (-6.50D) and the prescription add power (+3.00D), and a spherical lens of -3.50D is switched and placed in the examination window 43.

[0085] By viewing the display 31 through the examination window 43 with the subject's eye E corrected in this way, the subject can experience what it would be like to wear bifocal lenses and view a target 40 cm away.

[0086] For example, by selecting progressive lenses (bifocal lenses) as the type of eyeglass lens and switching the presentation distance of the visual target between distance and near vision distances, the subject can simulate how they would see with progressive lenses (bifocal lenses) on.

[0087] Furthermore, by simulating both the subject's vision with single-vision lenses and their vision with progressive lenses (bifocal lenses), it becomes easy to understand the difference in vision depending on the type of eyeglass lens. Therefore, it becomes easier for the subject to determine whether single-vision or progressive lenses are more suitable, and the optimal eyeglass lenses can be prescribed for the subject.

[0088] In the above example, the presentation distance of the visual target is switched between distance and near vision while keeping the selection of single-vision or progressive (bifocal) lenses as the type of spectacle lens. However, the method is not limited to this. For example, it is possible to switch the type of spectacle lens while keeping the selection of distance (or near vision) as the presentation distance of the visual target. Also, for example, it is possible to switch both the type of spectacle lens and the presentation distance of the visual target. For example, the control unit 60 executes the simulation by appropriately switching the arrangement of the display 31 and the optical elements 52 according to the combination of the multiple lens selection buttons 91 and the multiple distance selection buttons 92.

[0089] As described above, for example, the subjective optometry device of this embodiment includes a storage means for storing parameters of the corrective means corresponding to the presentation distance of the target presented to the eye under examination, associated with each of a plurality of types of spectacle lenses; a lens selection means for selecting a predetermined type of spectacle lens from the plurality of types of spectacle lenses; and a control means for retrieving parameters associated with the predetermined type of spectacle lens from the storage means based on the predetermined type of spectacle lens selected by the lens selection means, and setting the corrective means based on the retrieved parameters and the subjective measurement results obtained by the subjective optometry device. This allows the examiner to select a type of spectacle lens and have the subject confirm the target under the corrective means settings corresponding to the presentation distance of the target. In other words, the subject can experience what it is like to wear a predetermined spectacle lens and see a target at a predetermined presentation distance. Furthermore, by switching the type of spectacle lens, it is possible to compare how things look at a predetermined presentation distance with different types of spectacle lenses. Therefore, it becomes easier to prescribe the optimal spectacle lens for the subject.

[0090] Furthermore, for example, the subjective optometry device of this embodiment includes a setting means for setting multiple presentation distances as the presentation distance of a visual target for each of the multiple types of spectacle lenses, and a distance selection means for selecting a predetermined presentation distance from the multiple presentation distances set by the setting means. The storage means stores parameters of the correction means associated with each of the multiple presentation distances set by the setting means, and the control means retrieves the parameters for the predetermined presentation distance associated with the predetermined type of spectacle lens from the storage means based on the predetermined type of spectacle lens selected by the lens selection means and the predetermined presentation distance selected by the distance selection means, and sets the correction means. For example, by switching the type of spectacle lens and the presentation distance of the visual target, the examiner can change these combinations, allowing the examinee to compare how things look with different types of spectacle lenses and presentation distances. In other words, the examinee can try out how things look with various combinations of spectacle lens types and presentation distances. Therefore, it becomes easier to prescribe the optimal spectacle lens for the examinee.

[0091] Furthermore, for example, in the subjective optometry device of this embodiment, the multiple types of spectacle lenses include multiple progressive lenses. For example, progressive lenses have a wider range of options and various characteristics compared to monofocal lenses. Therefore, by being able to set multiple progressive lenses as the multiple types of spectacle lenses, it becomes easier to select the appropriate lens for the subject.

[0092] Furthermore, in the subjective eye examination device of this embodiment, for example, the multiple progressive lenses are at least one of bifocal lenses, intermediate-distance lenses, and near-distance lenses. This allows, for example, a subject to be unsure about which type of progressive lens to choose, to easily determine the type of progressive lens by comparing the differences in vision. In particular, even for lenses with similar design distances that can easily cause confusion, such as bifocal lenses and intermediate-distance lenses, or intermediate-distance lenses and near-distance lenses, the subject can experience the actual vision and then decide which one to choose.

[0093] Furthermore, for example, in the subjective optometry device of this embodiment, the subjective measurement results obtained using the subjective optometry device include at least the add power of the eye being examined, and the storage means stores parameters that take the add power into consideration as parameters of the corrective means when the presentation distance of the target presented to the eye being examined is the near-use distance and the type of spectacle lens is a progressive lens. This makes it easy to reproduce how the target looks at the near-use distance for each type of spectacle lens.

[0094] <Example of transformation> In this embodiment, a configuration in which distance and near vision distances can be selected as the target presentation distance was described as an example, but the invention is not limited to this. For example, a configuration in which distance, intermediate, and near vision distances can be selected as the target presentation distance may also be used. In this case, in the correspondence table showing the relationship between the type of spectacle lens 81, the target presentation distance 82, and the correction amount 83 of the eye under examination E, the target presentation distance 82 may include the intermediate distance. Also in this case, in the operation screen 90 of the examiner controller 10, a button indicating the intermediate distance may be included among the multiple distance selection buttons 92.

[0095] Figure 7 shows an example of a correspondence table 110 that includes intermediate distances as the target presentation distance 82. The correction amounts 83 for distance and near vision corresponding to the type of spectacle lens 81 are the same as in the correspondence table 80 in Figure 5. For example, when using a single-vision lens to improve distance vision, the spherical prescription value (Sph) is set as the correction amount 83 at intermediate distances. Also, for example, when using a single-vision lens to improve near vision, the sum of the spherical prescription value (Sph) and the prescription add power (Add) is set as the correction amount 83 at intermediate distances. For example, if the progressive lens is a bifocal or progressive lens, the sum of the spherical prescription value (Sph) and a predetermined value (γ) is set as the correction amount 83 at intermediate distances. Also, if the progressive lens is a near-vision lens, the sum of the spherical prescription value (Sph) and the prescription add power (Add), minus a predetermined value (β), is set as the correction amount 83 at intermediate distances.

[0096] For example, the predetermined value γ above may be a fixed value based on the intermediate distance of the visual target (for example, 2.0m) and the prescribed add power of the eye being examined E. For example, in a subjective examination of the eye being examined E, the prescribed add power for the prescription value at the distance distance of the eye being examined E (for example, 5m) is obtained. Therefore, the prescribed add power required at the intermediate distance of the visual target is set as the predetermined value γ. For example, if the prescribed add power for the eye being examined E at the distance distance (5m) is +3.00D, then the prescribed add power for the eye being examined E at the intermediate distance (2.0m) will be +0.50D, and the predetermined value γ will be set to +2.50D.

[0097] For example, the control unit 60 may appropriately switch the arrangement of the display 31 and the optical elements 52 depending on the combination of the multiple lens selection buttons 91 and the multiple distance selection buttons 92. If an intermediate distance is to be selectable as the presentation distance of the visual target, the distance switching unit 34 may be configured so that the display 31 is positioned at an optical distance of 2.0 m from the eye E being examined.

[0098] For example, in the subjective optometry device of this embodiment, the target presentation distance is at least one of the distance, intermediate, and near distances. This makes it easier to determine, for example, whether the type of spectacle lens that the subject intends to have made is suitable for the purpose of wearing the glasses. For example, if a certain type of spectacle lens is selected to make it easier to see distant objects such as a television, setting the target presentation distance to the distance distance allows for confirmation that there are no problems with the vision. For example, if a certain type of spectacle lens is selected to make it easier to see intermediate objects such as a computer, setting the target presentation distance to the intermediate distance allows for confirmation that there are no problems with the vision. For example, if a certain type of spectacle lens is selected to make it easier to see near objects such as magazines, setting the target presentation distance to the near distance allows for confirmation that there are no problems with the vision. Furthermore, if the subject feels that their vision is not good, they can change the type of spectacle lens to have an appropriate one made.

[0099] In this embodiment, the correspondence tables 80 and 110, which show the relationship between the type of spectacle lens 81, the presentation distance of the visual target 82, and the corrective amount 83 of the eye under examination E, were described using a configuration in which predetermined values ​​α, β, and γ are fixed values ​​as an example, but the embodiment is not limited to this. For example, these predetermined values ​​may be automatically set as variable values ​​based on the design of the spectacle lens worn by the subject, the prescription add power of the eye under examination E, the presentation distance of the visual target, etc. Alternatively, for example, these predetermined values ​​may be set arbitrarily by the examiner.

[0100] In this embodiment, a configuration was described as one in which the subject wears eyeglass lenses and views an object at a predetermined presentation distance by switching and positioning the optical elements 52 in front of the subject's eyes based on the type of eyeglass lens and the correction amount 83 corresponding to the presentation distance of the visual target, but the embodiment is not limited to this. For example, such a simulation may be performed by moving the display 31 in the optical axis direction relative to the subject's eye E based on the type of eyeglass lens and the correction amount 83 corresponding to the presentation distance of the visual target. In this case, the display 31 may be provided with a drive unit for moving the display 31 in the optical axis direction, and the desired spherical correction amount may be generated by controlling the drive unit.

[0101] In this embodiment, a configuration in which distance vision and near vision tests are performed as subjective examinations of the subject's eye was described as an example, but the embodiment is not limited to this. For example, if the eyeglass lenses worn by the subject are designed to improve distance vision, a near vision test may not necessarily be performed.

[0102] In this embodiment, the subjective optometry device may perform distance and near vision tests at distances desired by the subject, and then run a simulation based on the test results. Alternatively, the subjective optometry device may perform distance and near vision tests at pre-set fixed distances (5m) and near vision (40cm), and then run a simulation by converting the test results based on distance and near vision distances desired by the subject. More specifically, the prescription value corresponding to the fixed distance (5m) may be converted to a prescription value corresponding to the distance distance desired by the subject (converted prescription value), and this converted prescription value may be used to obtain the corrective amount according to the type of spectacle lens and the presentation distance of the visual target. Similarly, the prescription value corresponding to the fixed near vision distance (40cm) may be converted to a prescription value corresponding to the near distance desired by the subject (converted prescription value), and this converted prescription value may be used to obtain the corrective amount according to the type of spectacle lens and the presentation distance of the visual target. [Explanation of symbols]

[0103] 1 cabinet 2. Presentation window 10. Examiner's Controller 30 Floodlight Optics 31 displays 40. Refractive power measurement unit 43 Inspection window 60 Control Unit 100 Subjective eye examination device

Claims

1. A subjective optometry device for subjectively measuring the optical characteristics of an eye, comprising a corrective means for changing the optical properties of a target light beam emitted from a target presentation means, A storage means for storing a table or calculation formula that associates parameters of the corrective means corresponding to multiple presentation distances of the visual target presented to the eye under examination, with parameters that take into account the add power of the eye under examination, for each of multiple types of spectacle lenses, including progressive lenses. A lens selection means for selecting a predetermined type of eyeglass lens from the aforementioned plurality of eyeglass lens types, For each of the aforementioned multiple types of spectacle lenses, a setting means is provided to set the aforementioned multiple presentation distances as the presentation distance of the visual target, A distance selection means for selecting a predetermined presentation distance from the plurality of presentation distances set by the setting means, A control means that retrieves a table or calculation formula from the storage means corresponding to the predetermined type of spectacle lens and the predetermined presentation distance selected by the lens selection means, and sets the correction means based on the parameters in the table or calculation formula and the subjective measurement result including at least the add power obtained by the subjective optometry device. A subjective optometry device characterized by being equipped with the following features.

2. In the subjective eye examination device of claim 1, A subjective optometry device characterized in that the plurality of presentation distances of the visual target include at least two distances from among a distance, an intermediate distance, and a near distance.

3. In the subjective eye examination device of claim 1 or 2, A subjective optometry device characterized in that the plurality of presentation distances of the visual target include at least one of a plurality of distance distances, a plurality of intermediate distances, and a plurality of near distances.

4. A correction means for changing the optical properties of the target light beam emitted from the target presentation means, A storage means for storing a table or calculation formula that associates parameters of the corrective means corresponding to multiple presentation distances of visual targets presented to the eye under examination, with parameters that take into account the add power of the eye under examination, for each of multiple types of spectacle lenses, including progressive lenses. A subjective ophthalmography program for use in a subjective ophthalmography device for subjectively measuring the optical properties of the eye under examination, This is executed by the processor of the aforementioned subjective optometry device, A selection step of selecting a predetermined type of eyeglass lens from the aforementioned multiple types of eyeglass lenses, A setting step of setting the multiple presentation distances as the presentation distance of the visual target for each of the multiple types of eyeglass lenses, A distance selection step in which a predetermined presentation distance is selected from the plurality of presentation distances set in the setting step, A control step in which, based on the predetermined type of spectacle lens selected in the selection step and the predetermined presentation distance selected in the distance selection step, the table or calculation formula corresponding to the predetermined type of spectacle lens and the predetermined presentation distance is retrieved from the storage means, and the corrective means is set based on the parameters in the table or calculation formula and the subjective measurement results, including at least the add power, obtained by the subjective optometry device, A subjective eye examination program characterized by having the following features.

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