JP2008148930A - Self-aware type eye examiner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a self-aware type eye examiner where replacing a subject's optical elements is easy without the need of any special operations when a display is changed into a second display mode to display a visual target on a display screen. <P>SOLUTION: A CPU 28 that controls the operation of a visual target presentation part 13, a correction system 14 and a display 25 by operating an operator 24 displays a lens data 34 together with the visual targets 11 on the display screen 37 of the display 25 when the display 25 has changed from a first display mode to display the lens data 34 of corrective lenses or optical elements into a second display mode to display the visual targets 11. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a subjective optometry apparatus for examining the visual function of a subject's eye based on the subjective judgment of the subject.

  Conventionally, a subjective optometry apparatus for examining the visual function of each eye of a subject based on the response of the subject to determine the refractive power of the lens of the spectacle when creating the spectacles is known. (For example, refer to Patent Document 1).

  Such a subjective optometry apparatus has an optotype presenting unit that presents various optotypes to the eye to be examined, and a plurality of lenses that are optical elements for correcting the visual function of the eye to be examined. An optical element arranging device that selectively arranges a lens having a refractive power according to the response between the eye to be examined and the optotype presenting unit, and a controller that controls operations of the optotype presenting unit and the optical element arranging device. Prepare. The controller includes an operation unit operated to select a target and a lens to be presented to the eye to be examined, and a display unit for displaying lens data of the selected target and the lens on the operation unit, respectively. . The display unit includes a display screen on which the target and lens data are displayed, a first display mode in which the lens data is displayed on the display screen, and a second display mode in which the target is displayed on the display screen. Can be switched.

  When examining the visual function of the subject's eye while looking far away, the subject visually recognizes the target displayed on the target presentation unit through the lens and responds to the examiner about the appearance of the target. . Based on the response from the subject, the examiner selects the lens by operating the operation unit while looking at the lens data displayed on the display screen of the display unit in the first display mode. A lens arranged in the element arrangement device is replaced with another lens. On the other hand, when inspecting the visual function of the eye to be examined in a state of looking near, the examiner displays the target on the display screen by switching the display unit from the first display mode to the second display mode. The target is presented to the subject, and the corrective lens is replaced with a corrective lens corresponding to how the subject's eye is seen based on the response from the subject, in the same manner as the distance test.

Thereby, the visual function of the eye to be examined in the far vision state and the near vision state is corrected, and the value of the refractive power of the eyeglass lens to be created can be determined.
JP 2002-143092 A

  However, since the lens data is not displayed on the display screen in the state where the display unit is placed in the second display mode in which the target is displayed on the display screen, the examiner was displayed on the display screen during the near-field examination. The lens data cannot be visually recognized in the state where the visual target is presented to the eye to be examined. For this reason, when the examiner replaces the lens of the optical element arranging device during the near-field inspection, the display unit is changed from the second display mode to the first display so that the lens data can be visually recognized when the operation unit is operated. After switching to the mode and selecting the lens by operating the operation unit, it is necessary to switch the display unit from the first display mode to the second display mode again. Therefore, every time an optical element such as a lens is replaced during the near-field inspection, it is necessary to perform a special operation for displaying the lens data on the display screen separately from the operation for selecting the optical element. The work of replacing the optical element during the near-field inspection becomes complicated, and the inspection time is extended.

  Accordingly, an object of the present invention is a subjective optometry in which an optical element can be easily replaced without performing any special work in a state where the display unit is placed in the second display mode in which a target is displayed on the display screen. To provide an apparatus.

  In order to solve the above-mentioned problem, the invention according to claim 1 holds an optotype presenting unit on which various optotypes to be presented to the eye to be examined are displayed, and various optical elements. An optical element placement device for selectively placing the optical element of a type corresponding to a response from a subject who has seen the optotype between the eye to be examined and the optotype presenting unit, and each optotype And an operation unit operated to select each of the optical elements, and a display screen for displaying the target and the optical element data of the optical element selected by the operation of the operation unit, A display unit capable of switching between a first display mode in which optical element data is displayed and a second display mode in which the target is displayed; the target presenting unit based on an operation of the operation unit; and the optical Control the operation of the element placement device and the display unit, respectively. And a control unit, said control unit, in a state where the display unit is placed in the second display mode, wherein the display together with the visual target with the optical element data on the display screen.

  According to a second aspect of the present invention, in the first aspect of the invention, the control unit displays the optical element data on the display screen while the display unit is in the second display mode. It is characterized by continuing.

  According to a third aspect of the present invention, in the first aspect of the present invention, the control unit is configured so that the operation unit selects the optical element in a state where the display unit is in the second display mode. When operated, the optical element data is displayed on the display screen.

  According to a fourth aspect of the present invention, in the invention according to the third aspect, the control unit is configured such that the optical element is based on an operation of the operation unit in a state where the display unit is in the second display mode. When data is displayed on the display screen and it is detected that the operation unit has not been operated for a predetermined time, it is determined that the operation of the operation unit has ended, and the display of the optical element data is erased from the display screen. Features.

  According to a fifth aspect of the present invention, in the invention according to any one of the first to fourth aspects, the control unit is configured to perform the test in a state where the display unit is in the second display mode. The optical element data is displayed on the display screen at a position that does not interfere with visual recognition of the visual target by a person.

  The invention according to claim 6 is the invention according to claim 5, wherein the display unit is arranged in front of the subject so that the display screen faces the subject. Is located on the side of the subject, and the optical element data is displayed in a region located on the examiner side with respect to a central portion in the left-right direction of the display screen, and the target is the display It is characterized by being displayed on the screen in an area other than the area.

  The invention according to claim 7 is the invention according to claim 5 or 6, wherein the display screen is provided with a display field for displaying the optical element data, and the display field is the display screen. When the plurality of targets are arranged and displayed along the vertical direction of the display screen, they extend along the vertical direction of the display screen, and the plurality of targets are displayed on the display screen. Are arranged on the display screen so as to extend along the left-right direction of the display screen.

  According to the first aspect of the present invention, the display screen of the display unit capable of switching between the first display mode in which the optical element data of the optical element is displayed and the second display mode in which the target is displayed is displayed on the display screen. Since the optical element data is displayed together with the visual target under the control of the control unit in the state where the display unit is in the second display mode, the examiner, for example, the eye to be examined in a state of looking near The optical element data can be visually recognized in the state where the visual target displayed on the display screen in the state of the second display mode is presented to the eye to be examined in the near-field inspection for inspecting the visual function.

  Thus, when the examiner replaces the optical element of the optical element placement device during the near-field inspection using the target displayed on the display screen, the optical element data is obtained separately from the operation for selecting the optical element. Since there is no need to perform special work like the conventional one for displaying on the display screen, the replacement of the optical element is performed compared to the case where the special work is performed every time the optical element is replaced during the near-field inspection. The work can be performed reliably and easily.

  Accordingly, it is possible to reliably prevent the conventional inspection time from being extended due to the complicated replacement of the optical element.

  According to the second aspect of the invention, the control unit continues to display the optical element data on the display screen while the display unit is in the second display mode. Optical element data can always be visually recognized in the second display mode.

  According to the third aspect of the present invention, when the operation unit is operated to select an optical element in a state where the display unit is in the second display mode, the optical element data is controlled under the control of the control unit. Since it is displayed on the display screen, for example, the examiner is presenting the optotype displayed on the display screen to the eye to be examined while the display unit is in the second display mode at the near vision examination. However, when it is not necessary to visually recognize the optical element data, the optical element data is not displayed on the display screen, and the examiner does not display the optical element data as when operating the operation unit to select the optical element of the optical element arranging device. When it is necessary to visually recognize the optical element data, the optical element data is displayed on the display screen.

  Accordingly, the optical element data is always displayed on the display screen in the second display mode because the optical element data is displayed on the display screen only when the operation unit is operated in the second display mode in which the target is displayed on the display screen. Unlike the displayed case, optical element data does not enter the field of view of the subject's eye when the subject's eye is being examined and the operation unit is not operated. Accordingly, the visual target of the subject's eye can be measured more accurately because the subject can be made more visually conspicuous than the case where the optical element data enters the field of view during the examination of the subject's eye. be able to.

  According to the invention described in claim 4, the control unit displays the optical element data on the display screen based on the operation of the operation unit in a state where the display unit is in the second display mode, and the operation unit is predetermined. When it is detected that the operation is not performed for a predetermined time, it is determined that the operation of the operation unit is completed, and the display of the optical element data is erased from the display screen, so that the predetermined time elapses after the operation of the operation unit is completed. When this is done, the image of the optical element data displayed on the display screen can be erased from the display screen. Thereby, compared with the case where special operation is performed in order to erase the optical element data image displayed on the display screen from the display screen, the inspection time can be shortened more reliably.

  According to the fifth aspect of the present invention, the optical element data is at a position that does not hinder the visual recognition of the target by the subject in a state where the display unit is in the second display mode under the control of the control unit. Since it is displayed on the display screen, the image of the optical element data displayed on the display screen interferes with the visual recognition of the target by the subject in a state where the display unit is in the second display mode. It is possible to reliably prevent the subject from being confused. Thereby, the erroneous measurement of the visual function of the eye to be inspected due to the confusion of the subject can be reliably prevented.

  According to the sixth aspect of the present invention, the display unit is arranged in front of the subject so that the display screen faces the subject, and the examiner is located on the side of the subject. Since the optical element data is displayed in an area located closer to the examiner than the horizontal center of the display screen, the optical element data is displayed on an area other than the area on the display screen. In comparison, the angle formed by the examiner's line of sight and the display screen when viewing the optical element data displayed on the display screen is increased. As a result, when the display screen is constituted by a liquid crystal panel, for example, even when the viewing angle of the liquid crystal panel is narrow, the optical element data is displayed on the display screen as compared with the case where the optical element data is displayed in an area other than the area. The optical element data can be clearly seen.

  According to the seventh aspect of the present invention, the display column in which the optical element data is displayed is displayed on the display screen when a plurality of targets are arranged and displayed along the vertical direction of the display screen. It is arranged on the display screen so as to extend along the vertical direction, and when a plurality of targets are arranged on the display screen along the horizontal direction of the display screen, they extend along the horizontal direction of the display screen. Therefore, the display column extends along the moving direction of the eye to be examined who views each target displayed on the display screen at the time of examination. As a result, the interval between each target displayed on the display screen and the display column becomes substantially uniform along the extension direction, so that the eye to be examined sequentially sees each target in the arrangement direction when examining the subject's eye. Unlike the case where the display column is displayed on the display screen so as to extend along the direction orthogonal to the direction of arrangement of each target, the optical element data reflected on the subject's eye is little by little as the subject's eye moves. It doesn't become clear or gradually unclear. Accordingly, it is possible to surely prevent the visual inspection of the eye to be examined looking at the visual target by changing the clarity of the optical element data reflected on the eye to be examined during the movement of the eye to be examined.

  The present invention will be described with reference to the illustrated embodiments.

  As shown in FIG. 1, a subjective optometry apparatus 10 according to the present invention includes an optotype presenting unit 13 for displaying various optotypes 11 to be presented to the subject's eye 12 and a visual function of the subject's eye. And a straightening device 14 for straightening. As is well known in the art, the subjective optometry apparatus 10 is used to determine the refractive power of a lens of a pair of glasses when creating glasses (not shown).

  The optotype presenting unit 13 has a display screen 16 on which the optotype 11 is displayed. In the illustrated example, the display screen 16 is configured by a liquid crystal panel, and the target 11 displayed on the display screen 16 is selected by an operation of the controller 15 described later.

  An optometry table 18 is disposed between the optotype presenting unit 13 and the subject 12, and the optometry table is provided with a column 19 extending upward from the optometry table. An arm 20 extending in the lateral direction is provided on the upper portion of the support column 19, and the correction device 14 is attached to the arm 20. The examiner 23 is located on the side of the optometry table 18 when examining the eye to be examined.

  The correction device 14 includes a pair of phoropters 21 arranged side by side in the left-right direction. Each phoropter 21 includes a housing 21a in which an optometry window 22 is formed. In each housing 21a, although not shown, an annular lens disk in which a plurality of correction lenses having different refractive powers are provided along the circumferential direction is rotatably housed as in the prior art. That is, the correction device 14 constitutes an optical element placement device that selectively places the correction lens, which is an optical element, between the eye to be examined and the optotype presenting unit 13. The correction lenses are selectively arranged in the optometry windows 22 by the rotation of the lens disk under the control of the controller 15.

  Furthermore, the subjective optometry apparatus 10 according to the present invention includes the above-described controller 15 for controlling the operations of the correction device 14 and the optotype presenting unit 13.

  The controller 15 is placed on the optometry table 18, and as shown in FIGS. 2 and 3, the operation unit 24 operated by the examiner 23 (see FIG. 1), the target 11 and the operation unit 24. A display unit 25 for displaying operation images indicating the operation contents of the control unit 26, an arithmetic control circuit 26 for controlling the operation of the optotype presenting unit 13, the correction device 14, and the display unit 25 based on the operation of the operation unit 24, And an image output unit 27 connected to the display unit 25 and the optotype presenting unit 13.

  The arithmetic control circuit 26 has a CPU 28 and a memory unit 29 as shown in FIG. The CPU 28 is connected to the operation unit 24 and the image output unit 27, and is further connected to a drive control unit (not shown) provided in the correction device 14. The memory unit 29 is used for various visual targets 11 used for a distance test for examining the visual function in the far vision state of the eye to be examined and for a near vision test for examining the visual function in the near vision state of the eye to be examined. Target data 30 indicating each of the various targets 11, operation image data 31 indicating an operation image, various calculation programs 33 for calculation by the CPU 28, spherical power, astigmatism power of each correction lens, Lens data 34 indicating the refractive power such as the axial angle, the prism amount H in the horizontal direction, and the prism amount V in the vertical direction is stored.

  As shown in FIG. 3, the operation unit 24 has a dial 35 for selecting the correction lens arranged in the optometry window 22 of each phoropter 21 and first data on which lens data 34 is displayed as will be described later. Various switches for setting the examination, such as a display changeover switch 36 for switching the display unit 25 between the display mode and the second display mode in which the target 11 is displayed, are provided.

  When the dial 35 of the operation unit 24 is operated, the CPU 28 extracts the lens data 34 indicating the refractive power corresponding to the operation position of the dial from the memory unit 29, and has the refractive power indicated by the extracted lens data 34. A control signal indicating that the correcting lens is arranged in the optometry window 22 of each phoropter 21 is sent to the drive control unit of the correcting device 14. As a result, the correction lens having the refractive power selected by operating the dial 35 is arranged in the optometry window 22 of each phoropter 21.

  Further, when the dial 35 is operated, the CPU 28 sends a signal indicating the lens data 34 extracted from the memory unit 29 to the image output unit 27.

  Further, when the display mode of the display unit 25 is switched between the first display mode and the second display mode by the operation of the display changeover switch 36, the CPU 28 stores the operation image data 31 corresponding to each display mode. A signal extracted from the unit 29 and indicating the operation image data 31 dedicated to each display mode is sent to the image output unit 27.

  As shown in FIG. 2, the display unit 25 includes a display screen 37 on which the operation image and the target 11 are displayed by operating the switches of the operation unit 24. In the example shown in FIG. 3, the display unit 25 has a lower edge 25 a around the shaft member via a shaft member (not shown) provided along the edge 24 a of the operation unit 24. Is rotatably supported. As described above, the display unit 25 can be switched between the first display mode and the second display mode described above by operating the display changeover switch 36. The display screen 37 is composed of a liquid crystal panel in the illustrated example.

  When the display unit 25 is in the first display mode, the display screen 37 displays the lens data 34 of the correction lens selected by operating the dial 35 of the operation unit 24, as shown in FIG. A refractive power display column 38 is provided. Further, in the illustrated example, the display screen 37 includes a display screen 37 of the display unit 25 in the second display mode and the type of the target 11 for distance examination displayed on the display screen 16 of the target presentation unit 13. A list display column 39 for displaying a list of types of the near vision target 11 displayed on the display, and a target display column for displaying the target 11 selected from the list display column 39 to be used for the inspection. 40 is provided. That is, in this embodiment, the target 11 can be displayed on the display screen 37 together with the lens data 34 in a state where the display unit 25 is in the first display mode.

  The refractive power display column 38, the list display column 39, and the target display column 40 are included in the operation image data 31 stored in the memory unit 29, respectively.

  In this embodiment, a touch panel (not shown) is provided on the display screen 37. The touch panel is arranged on the list display field 39, and although not shown, as is well known in the art, a plurality of conductive film stripes are formed in parallel to each other, and a transparent film provided with resistance films at both ends is provided. It is formed by bonding a pair of panel members such as a film and glass so that the conductive film stripes are orthogonal to each other. When the surface of the touch panel is pressed down, when the conductive film stripes formed on the panel members are electrically connected to each other, they are electrically connected to each other based on the voltage appearing on the resistance films. It is detected by the touch sensor that any one of the plurality of conductive film stripes of the panel member is in contact with any one of the plurality of conductive film stripes of the other panel member. Thereby, the pressed position of the touch panel is specified. Accordingly, for example, the target 11 is displayed from the list display column 39 by pressing an image indicating the target 11 used for the inspection from among the respective targets 11 displayed on the display screen 37 from the display screen 37. You can choose. When the touch sensor detects a pressed position, the touch sensor sends a detection signal indicating the position to the CPU 28.

  When the CPU 28 receives the detection signal from the touch sensor, the CPU 28 extracts the target data 30 corresponding to the target 11 at the pressed position indicated by the detection signal from the memory unit 29, and a signal indicating the extracted target data 30. Is sent to the image output unit 27.

  On the other hand, in the state where the display unit 25 is in the second display mode in which the target 11 is displayed on the display screen 37, the lens data 34 is displayed on the display screen 37 in the example shown in FIG. A refractive power display column 41 is provided. In the illustrated example, the refractive power display column 41 is provided at the lower part of the display screen 37 so as not to overlap the visual target 11 displayed on the display screen 37. In the example shown in the drawing, the refractive power display column 41 shows the values of spherical power, astigmatism power, axial angle, addition, prism amount H in the horizontal direction, and prism amount V in the vertical direction in the lens data 34 of the correction lens. Has been. The refractive power display column 41 is included in the operation image data 31 stored in the memory unit 29.

  In the example shown in FIG. 2, the image output unit 27 includes a first output port 43 for outputting an operation image signal indicating the operation image data 31 received from the CPU 28, and a target image indicating the target data 30 received from the CPU 28. A second output port 44 for outputting a signal and a third output port 45 for outputting a refractive power image signal indicating lens data 34 received from the CPU 28 are provided. In the illustrated example, the first output port 43 and the third output port 45 are each connected to the display unit 25, and the second output port 44 is connected to the display unit 25 and the target presentation unit 16. .

  When the display unit 25 is in the first display mode, when the image output unit 27 receives a signal indicating the operation image data 31 for the first display mode from the CPU 28, the operation for the first display mode is performed. An operation image signal indicating that an image is to be displayed on the display screen 37 is output to the display unit 25 via the first output port 43. Accordingly, the display screen 37 of the display unit 25 includes the refractive power display column 38, the list display column 39, and the target display column 40 included in the operation image data 31 for the first display mode, as shown in FIG. Is displayed.

  Further, when the image output unit 27 receives a signal indicating the lens data 34 from the CPU 28 in the first display mode, the image output unit 27 displays the refractive power indicated by the lens data 34 in the refractive power display column 38 included in the operation image data 31. Are output to the display unit 25 via the third output port 45. As a result, the refractive power value of the correcting lens selected by operating the dial 35 is displayed in the refractive power display field 38 of the display screen 37 of the display unit 25 as shown in FIG.

  Further, when the image output unit 27 receives a signal indicating the target data 30 for distance inspection from the CPU 28 in the first display mode, the image output unit 27 displays the target 11 for distance inspection indicated by the target data of the operation image. A target image signal to be displayed in the target display field 40 is output to the display unit 25 via the second output port 44. As a result, as shown in FIG. 4, the distance test target 11 selected by the display unit 25 is displayed in the target display column 40 of the display unit 25.

  That is, in the first display mode, the target 11 and the lens data 34 can be displayed on the display screen 37 by displaying the target display column 40 and the refractive power display column 38 of the operation image on the display screen 37, respectively. And displayed on the display screen 37 via the target display field 40 and the refractive power display field 38 by being displayed in the target display field 40 and the refractive power display field 38, respectively.

  In addition, when the image output unit 27 receives a signal indicating the target data 30 for distance inspection from the CPU 28 in the first display mode, the image output unit 27 displays the target 11 for distance inspection indicated by the target data 30 on the display screen 16. The visual target image signal to be displayed is output to the visual target presenting unit 13 via the second output port 44. As a result, the distance test target 11 selected by the display unit 25 is displayed on the display screen 16 of the target presentation unit 13 as shown in FIG.

  On the other hand, when the display unit 25 is in the second display mode, when the image output unit 27 receives a signal indicating the target data 30 for near-field inspection from the CPU 28, the near-use data indicated by the target data is displayed. A target image signal for displaying the test target 11 on the display screen 37 is output to the display unit 25 via the second output port 44. As a result, the near vision examination target 11 selected on the display unit 25 is displayed on the display screen 37 of the display unit 25 over almost the entire area of the display screen 37, as shown in FIG.

  When the image output unit 27 receives a signal indicating the operation image data 31 for the second display mode from the CPU 28 in the second display mode, the image output unit 27 displays the operation image for the second display mode on the display screen 37. An operation image signal indicating this is output to the display unit 25 via the first output port 43. Thereby, the refractive power display field 41 included in the operation image data 31 for the second display mode is displayed on the display screen 37 of the display unit 25 as shown in FIG.

  Further, when the image output unit 27 receives a signal indicating the lens data 34 from the CPU 28 in the second display mode, the image output unit 27 outputs a refractive power image signal indicating that the refractive power indicated by the lens data 34 is displayed in the refractive power display column 41. The data is output to the display unit 25 through the three output ports 45. As a result, the refractive power display column 41 of the display screen 37 of the display unit 25 displays the value of the refractive power of the correction lens selected by operating the dial 35 as shown in FIG. That is, in the second display mode, the lens data 34 can be displayed on the display screen 37 by displaying the refractive power display column 41 of the operation image on the display screen 37, and displayed on the refractive power display column 41. As a result, it is displayed on the display screen 37 via the refractive power display field.

  At the time of a distance examination for examining the visual function of the subject's eye in a state of looking far away, the examiner 23 first provides the operation unit 24 when the display unit 25 is in the second display mode. The display unit 25 is switched to the first display mode by operating the displayed display switch 36. At this time, as described above, the operation image for the first display mode is displayed by the operation image signal output from the image output unit 27 to the display unit 25 through the first output port 43 under the control of the CPU 28. Displayed on the unit 25.

  Next, the examiner 23 selects the target 11 for the distance inspection used for the inspection by operating the list display column 39 of the display unit 25. At this time, as described above, the selected target 11 is displayed on the target display column 40 of the display unit 25 and the display screen 16 of the target display unit 13. The examiner 23 can confirm whether or not the displayed target 11 matches the selected target 11 by visually recognizing the target 11 displayed in the target display field 40.

  Subsequently, the examiner 23 causes the subject 12 to see the optotype 11 displayed on the display screen 16 of the optotype presenting unit 13 through the correction lenses arranged in the optometry windows 22, and the appearance condition thereof. hear. The examiner 23 switches the correction lens arranged in each optometry window 22 by operating the dial 35 of the operation unit 24 based on the response of the subject 12. At this time, since the lens data 34 of the correction lens selected by operating the dial 35 is displayed in the refractive power display column 38 of the display unit 25 as described above, the examiner 23 visually recognizes the lens data 34. The dial 35 can be operated while operating. By switching the correction lens, the visual function of the eye to be examined is corrected, and the refractive power of the eyeglass lens to be created can be determined.

  On the other hand, at the time of a near-field examination in which the visual function of the subject's eye is examined in a state of looking near, the examiner 23 first sets the controller 15 on the optometry table 18 on the subject 12 as shown in FIG. It arrange | positions ahead and makes the display screen 37 oppose each phoropter 21 by rotating the display part 25 around the said shaft member.

  Next, the examiner 23 selects the near vision inspection target 11 used for the inspection by operating the list display field 39 of the display unit 25, and operates the display changeover switch 36 to set the display unit 25 to the first display mode. To switch to the second display mode. At this time, as described above, the operation image signal, the target image signal, and the refractive power image signal output from the image output unit 27 to the display unit 25 under the control of the CPU 28, An operation image for the second display mode, the selected near-inspection target 11 and the lens data 34 of the selected correction lens are displayed on the display screen 37, respectively.

  At this time, in order to display the visual target 11 on the display screen 37 with a size corresponding to the visual acuity value to be inspected and the distance between the display screen 37 and each phoropter 21, the applicant of the present application, for example, As proposed in Japanese Patent Application No. 2006-219492), the distance between each phoropter 21 and the display screen 37 is calculated using the calculation program 33 of the memory unit 29, and the size of the target 11 is inspected based on the calculated distance. After adjusting the size according to the target visual acuity value, the target 11 whose size has been adjusted can be displayed on the display screen 37.

  Subsequently, the examiner 23 causes the subject 12 to see the visual target 11 displayed on the display screen 37 of the display unit 25 through the correction lenses arranged in the optometry windows 22 and listens to the appearance. . Thereafter, the examiner 23 switches the correction lens to be arranged in each optometry window 22 by operating the dial 35 of the operation unit 24 based on the response of the subject 12 as in the case of the distance examination. At this time, since the lens data 34 is displayed in the refractive power display column 41 provided at the bottom of the display screen 37 as described above, the examiner 23 operates the dial 35 while visually checking the lens data 34. can do.

  Further, when the oblique examination for measuring the oblique degree of the eye to be examined is performed using the subjective optometry apparatus 10 according to the present invention, the display screen 16 of the target presentation unit 13 or the display screen 37 of the display unit 25 is displayed. By attaching a polarizing plate (not shown) and using the backlight of the optotype presenting unit 13 or the display unit 25, the oblique inspection can be performed as in the conventional case. Alternatively, instead of this method, a well-known red and green target (not shown) is displayed on the display screen 16 of the target presentation unit 13 or the display screen 37 of the display unit 25, and the optometry windows 22 of the phoropters 21 are displayed. By providing a red / green filter (not shown) on the left and right eyes, it is possible to perform the oblique position inspection by causing the left and right eyes to present separate images. Further, instead of these methods, for example, a liquid crystal filter (not shown) is provided on the correction lens provided on the lens disk in each phoropter 21 so that the display screen 16 of the target presentation unit 13 or the display screen 37 of the display unit 25 is displayed. The left-eye target 11 and the right-eye target 11 are alternately displayed at a high speed, and the liquid crystal filter is provided by rotating each lens disk in accordance with the replacement of each target 11. The corrective lens and the corrective lens not provided with the liquid crystal filter are alternately arranged in the optometry window 22 of each phoropter 21, thereby causing the left and right eyes to be presented with individual images, respectively. Inspection can be performed.

  According to the present embodiment, as described above, the display unit 25 that can switch between the first display mode in which the lens data 34 of each correction lens is displayed and the second display mode in which the target 11 is displayed. Since the lens data 34 is displayed on the display screen 37 together with the target 11 under the control of the CPU 28 with the display unit 25 in the second display mode, the examiner 23 can Sometimes, the lens data 34 can be viewed in a state where the visual target 11 displayed on the display screen 37 in the second display mode is presented to the eye to be examined.

  Thereby, when the examiner 23 replaces each correction lens of the correction device 14 during the near-field examination using the target 11 displayed on the display screen 37, the operation for selecting each correction lens is as follows. In addition, since it is not necessary to perform a special operation as in the past for displaying the lens data 34 on the display screen 37, the conventional operation is performed every time the correction lenses are replaced during the near-field inspection. Compared to the case, the replacement operation of each correction lens can be performed easily and reliably.

  Therefore, it is possible to reliably prevent the conventional inspection time from being extended due to the complicated replacement of each correction lens.

  As described above, the lens data 34 is continuously displayed on the display screen 37 under the control of the CPU 28 while the display unit 25 is in the second display mode. The lens data 34 can be viewed at all times while 25 is in the second display mode.

  Furthermore, as described above, when the display unit 25 is in the second display mode, the lens data 34 is displayed at the bottom of the display screen 37 so as not to overlap the visual target 11 displayed on the display screen 37. Therefore, the image is displayed on the display screen 37 at a position that does not hinder the visual recognition of the target 11 by the subject 12. As a result, the image of the lens data 34 displayed on the display screen 37 obstructs the visual recognition of the target 11 by the subject 12 in a state where the display unit 25 is in the second display mode. It is possible to reliably prevent the person 12 from being confused. Thereby, the erroneous measurement of the visual function of the eye to be examined due to the confusion in the subject 12 can be reliably prevented.

  Further, as described above, since the target 11 is displayed on the display screen 37 in a state where the display unit 25 is in the first display mode, the examiner 23 is placed in the first display mode. By viewing the display screen 37 of the display unit 25, the lens data 34 can be confirmed, and the target 11 selected by the operation unit 25 can be easily confirmed. Thus, when the examiner 23 presents the visual target 11 displayed on the visual target presentation unit 13 to examine the visual function of the eye to be examined in a state of looking far away, the first display is performed. By visually recognizing the target 11 displayed on the display screen 37 in the mode, the target 11 displayed on the target presenting unit 13, that is, the target 11 presented to the subject 12 is selected by operating the operation unit 24. It is possible to easily confirm whether or not it matches the target 11 made. Therefore, the examiner 23 looks into the visual target presentation unit 13 in order to confirm whether or not the visual target 11 presented to the subject 12 matches the visual target 11 selected by the operation of the touch panel. Compared to the case, the visual function test of the eye to be examined can be smoothly advanced.

  In the present embodiment, the example in which the lens data 34 is always displayed on the display screen 37 while the display unit 25 is in the second display mode has been described. When the operation unit 24 is operated to select the correction lens in the display mode, the lens data 34 can be displayed on the display screen 37.

  In this case, when the display unit 25 is in the second display mode and the dial 35 of the operation unit 24 is operated, the CPU 28 detects that the dial has been operated, and moves the dial to the operation position. Lens data 34 indicating the corresponding refractive power is extracted from the memory unit 29, and a signal indicating the extracted lens data 34 is sent to the image output unit 27. Further, when the CPU 28 detects that the dial 35 has been operated while the display unit 25 is in the second display mode, the CPU 28 extracts the operation image data 31 corresponding to the second display mode from the memory unit 29. Then, a signal indicating the operation image data 31 for the second display mode is sent to the image output unit 27.

  When the image output unit 27 receives signals indicating the lens data 34 and the operation image data 31 from the CPU 28 in the second display mode, the operation image indicating the operation image for the second display mode, as described above. The signal is output to the display unit 25 via the first output port 43, and the refractive power image signal indicating that the refractive power indicated by the lens data 34 is displayed in the refractive power display column 41 is output to the third output port 45. To the display unit 25. As a result, the refractive power display column 41 is displayed on the display screen 37, and the lens data 34 of the correction lens selected by operating the dial 35 is displayed in the refraction display column. The display position of the refractive power display column 41 on the display screen 37 in the second display mode does not interfere with the visual recognition of the target 11 by the subject 12, for example, as shown in FIG. Can be set at the bottom.

  Further, in this case, the CPU 28 measures the time from the point when the operation of the dial 35 is not detected in the state where the display unit 25 is in the second display mode, that is, the time when the operation of the dial 35 is not performed. When the measured time has passed a predetermined time, it is determined that the operation of the dial 35 is finished, and a control signal for stopping the output of the operation image signal and the refractive power image signal to the display unit 25 is displayed as an image. The data is sent to the output unit 27. The time measurement by the CPU 28 is performed using, for example, a calculation program 33 stored in the memory unit 29.

  The image output unit 27 stops the output of the operation image signal and the refractive power image signal to the display unit 25 based on the control signal from the CPU 28. As a result, the display of the refractive power display column 41 and the lens data 34 disappears from the display screen 37.

  According to this example, when the dial 35 of the operation unit 24 is operated to select the correction lens while the display unit 25 is in the second display mode, the lens data 34 is controlled under the control of the CPU 28. Since it is displayed on the display screen 37, for example, while the visual target 11 displayed on the display screen 37 is presented to the eye to be examined while the display unit 25 is in the second display mode during the near-field examination. Thus, when the examiner 23 does not need to visually recognize the lens data 34, the lens data 34 is not displayed on the display screen 37, as when the dial 35 is operated to select the correction lens of the correction device 14. The lens data 34 is displayed on the display screen 37 when the examiner 23 needs to visually recognize the lens data 34.

  Therefore, since the lens data 34 is displayed on the display screen 37 only when the dial 35 is operated in the second display mode in which the target 11 is displayed on the display screen 37, the lens data 34 is displayed in the second display mode. Unlike the case where it is always displayed on the screen 37, the lens data 34 does not enter the field of view of the subject's eye when the subject's eye is being examined and the dial 35 is not operated. Thereby, compared with the case where the lens data 34 enters the field of view during the examination of the eye to be inspected, the visual target 11 can be viewed more concentrated on the subject 12 and thus the visual function of the eye to be examined can be more accurately determined. Can be measured.

  Further, according to this example, the CPU 28 causes the lens data 34 to be displayed on the display screen 37 based on the operation of the dial 35 in a state where the display unit 25 is in the second display mode. When it is detected that the dial is not operated, it is determined that the operation of the dial has been completed, and the display of the lens data 34 is erased from the display screen 37. Therefore, when the predetermined time has elapsed after the operation of the dial 35 is completed. The image of the lens data 34 disappears from the display screen 37. Thereby, compared with the case where special operation is performed in order to erase the image of the lens data 34 displayed on the display screen 37 from the display screen 37, the inspection time can be shortened more reliably.

  In this embodiment, the refractive power display column 41 displayed on the display screen 37 of the display unit 25 in the second display mode includes the spherical power, astigmatism power, axial angle, addition, and horizontal prism of the correction lens. Although an example in which six columns for displaying data of the amount H and the prism amount V in the vertical direction are provided corresponding to the left eye and the right eye, respectively, instead of this, for example, data of spherical power and astigmatism power is used. A refractive power display column having two columns to be displayed corresponding to each of the left eye and the right eye can be applied to the present invention.

  Furthermore, in the present embodiment, an example is shown in which the type of lens data 34 of the correction lens displayed in the refractive power display column 41 displayed on the display screen 37 of the display unit 25 in the second display mode is fixed. However, instead of this, the type of lens data 34 displayed in the refractive power display column 41 can be selected.

  In this case, a data selection switch (not shown) for selecting the type of the lens data 34 of the correction lens can be provided in the operation unit 24. By operating the data selection switch, each type of lens data 34 can be selected one by one, and a plurality of types can be selected simultaneously. Further, the images in the respective columns in which the various types of data of the lens data 34 are displayed are included in the operation image data 31 stored in the memory unit 29, respectively.

  In this case, when the data selection switch is operated, the CPU 28 extracts the column for displaying the type selected by the operation of the data selection switch from the memory unit 29, and extracts the extracted image of the column. Is sent to the image output unit 27.

  When the data selection switch is operated, the CPU 28 extracts data corresponding to the selected type from the memory unit 29 and sends a signal indicating the extracted data to the image output unit 27.

  When the image output unit 27 receives a signal indicating the image in the column from the CPU 28, the image output unit 27 outputs an operation image signal indicating that the image is displayed on the display screen 37 to the display unit 25 via the first output port 43. . Thereby, the column corresponding to the type selected by operating the data selection switch is displayed on the display screen 37 of the display unit 25.

  When the image output unit 27 receives a signal indicating data corresponding to the type selected by the data selection switch from the CPU 28, the image output unit 27 outputs a refractive power image signal indicating that the refractive power indicated by the data is displayed in the column. The data is output to the display unit 25 through the three output ports 45. Thereby, the value of the refractive power corresponding to the type of the lens data 34 selected by the operation of the data selection switch is displayed in the column of the display screen 37 of the display unit 25.

  Further, in this embodiment, an inspection selection switch (not shown) for selecting the type of inspection such as sphericity inspection, astigmatism inspection, and oblique inspection can be provided in the operation unit 24. In this case, when an inspection is selected by operating the inspection selection switch, the CPU 28 extracts at least the data necessary for the selected inspection among the types of the lens data 34, and the extracted data is displayed on the display screen 37. Can be displayed. That is, for example, when an oblique inspection is selected by operating the inspection selection switch, at least prism amount H and prism amount V data of the correction lens are displayed on the display screen 37, respectively.

  In the present embodiment, an example is shown in which the refractive power display column 41 in which the lens data 34 is displayed in the second display mode is provided at the lower part of the display screen 37 of the display unit 25. In the state shown in FIG. 6 in which the controller 15 is arranged on the optometry table 18 so that the display screen 37 of the display unit 25 faces each phoropter 21 at the near examination, the refractive power display column 41 is displayed as shown in FIG. It is displayed on the display screen 37 of the display unit 25 in an area located closer to the examiner 23 (right side as viewed in FIG. 7) than the central part in the left-right direction of the display screen, and the target 11 for near-field inspection. Can be displayed on the display screen 37 in a region other than the region.

  For example, when the refractive power display column 41 is displayed on the display screen 37 in a region on the side farther from the examiner 13 than the central portion in the horizontal direction of the display screen, as shown in FIG. When the examiner 13 located on the side of the display unit 25 views the lens data 34 displayed on the display screen 37 from an oblique side of the display unit 25, the line of sight of the examiner 13 (shown by a dotted line in FIG. 6). ) And the display screen 37 becomes smaller. For this reason, when the viewing angle of the liquid crystal panel constituting the display screen 37 is narrow, the lens data 34 displayed on the display screen 37 appears faint. For this reason, the operation of confirming the lens data 34 displayed on the display screen 37 becomes complicated.

  On the other hand, according to the example shown in FIG. 7, the lens data 34 is displayed in a region located closer to the examiner 13 than the central portion of the display screen 37 in the left-right direction. Compared with the case where the lens data 34 displayed on the display screen 37 is viewed from an oblique side of the display unit 25 (indicated by a solid line in FIG. 6), the lens data 34 displayed on the display screen 37 is viewed from an oblique side. The angle θ formed by the display screen 37 is increased. Thereby, even when the viewing angle of the liquid crystal panel constituting the display screen 37 is narrow, the lens data 34 is displayed on the display screen 37 in a region on the side farther from the examiner 13 than the central portion in the horizontal direction of the display screen. Compared to the case, the lens data 34 displayed on the display screen 37 can be clearly seen.

  In the case of the example shown in FIG. 7, the display screen 37 is composed of a liquid crystal panel with a wide viewing angle, so that the examiner 13 can view the lens data 34 displayed on the display screen 37 from an oblique side of the display unit 25. The lens data 34 can be made more clearly visible when

  Furthermore, in the present embodiment, the refractive power display column 41 displayed on the display screen 37 of the display unit 25 in the second display mode is displayed, and a plurality of targets 11 are displayed on the display screen 37 along the vertical direction of the display screen 37. When arranged and displayed, they are arranged on the display screen 37 so as to extend along the vertical direction of the display screen, and a plurality of targets 11 are arranged on the display screen 37 along the horizontal direction of the display screen 37. When displayed, it can be arranged on the display screen 37 so as to extend along the left-right direction of the display screen.

  In this case, the display position of the refractive power display column 41 on the display screen 37 is switched between the inspection in which the plurality of targets 11 are sequentially viewed along the vertical direction of the display screen 37 and the inspection in which the visual targets 11 are sequentially viewed along the horizontal direction. For example, the above-described inspection selection switch can be operated.

  For example, when a so-called Landolt ring, which is a plurality of targets 11 arranged in a matrix, is displayed on the display screen 37, when each target 11 is sequentially viewed along the vertical direction of the display screen 37, for example, As shown in FIG. 8A, the refractive power display column 41 is arranged so as to extend along the vertical direction of the display screen 37 in one of the left and right end regions of the display screen 37.

  On the other hand, when each target 11 is sequentially displayed on the eye to be examined along the horizontal direction of the display screen 37, for example, as shown in FIG. 8B, the refractive power display column 41 is displayed in the lower area of the display screen 37. It arrange | positions so that it may extend along the left-right direction.

  According to the example shown in FIGS. 8A and 8B, as described above, the refractive power display column 41 in which the lens data 34 is displayed is displayed on the display screen 37 with a plurality of targets 11 on the display screen 37. Are arranged on the display screen 37 so as to extend along the vertical direction of the display screen, and a plurality of targets 11 are displayed on the display screen 37 in the horizontal direction of the display screen 37. Are arranged on the display screen 37 so as to extend along the horizontal direction of the display screen, the refractive power display column 41 is displayed on the display screen 37 at the time of inspection. It extends along the direction of movement of the eye to be examined viewing each visual target 11.

  As a result, the distance between each index 11 displayed on the display screen 37 and the refractive power display column 41 is substantially uniform along the extending direction, so that the eye to be inspected displays each index 11 during the examination of the eye. Unlike the case where the refractive power display column 41 is displayed on the display screen 37 so as to extend along the direction orthogonal to the arrangement direction of the respective visual targets 11 when viewed sequentially in the arrangement direction, as the eye to be examined moves. The lens data 34 reflected in the eye to be examined does not become clear little by little or unclear little by little. Accordingly, it is possible to surely prevent the eye of the subject to see the visual target 11 from being obstructed due to the change in the clarity of the lens data 34 reflected on the subject's eye when the eye is moved.

  In the example shown in FIGS. 8A and 8B, each Landolt ring having a size corresponding to the same visual acuity value among the above-mentioned Landolt rings which are a plurality of targets 11 arranged in a matrix is performed. The Landolt rings arranged in the direction, that is, in the left-right direction of the display screen 37 and having sizes corresponding to different visual acuity values are reduced in the row direction, that is, in the vertical direction of the display screen 37, so that the visual acuity value decreases. However, instead of this, each Landolt ring having a size corresponding to the same visual acuity value is displayed on the display screen 37. The Landolt rings arranged in the vertical direction and having sizes corresponding to different visual acuity values are arranged in the left-right direction of the display screen 37 such that the visual acuity values decrease from left to right, for example. It can be.

  In this case, for example, the state shown in FIG. 8A can be switched to the state shown in FIG. 9 by replacing the matrix of each Landolt ring that is the target 11 in the state shown in FIG. In this case, for example, an exchange switch (not shown) for exchanging the matrix of each Landolt ring is provided in the operation unit 24, and the matrix of each Landolt ring can be exchanged by operating the exchange switch.

  For example, when the replacement switch is operated, the CPU 28 detects that the replacement switch has been operated, and displays a control signal indicating that the matrix of each Landolt ring displayed on the display screen 37 is replaced and displayed. The image is sent to the image output unit 27.

  When the image output unit 27 receives a control signal indicating that the matrix of each Landolt ring is exchanged from the CPU 28, the image output unit 27 performs image processing for exchanging the rows and columns of each Landolt ring with each other, and each Landolt ring whose matrix is exchanged is performed. Is output to the display unit 25 via the second output port 44.

  According to the example shown in FIG. 9, for example, in the state shown in FIG. 8A, a plurality of Randolt rings having different visual acuity values, that is, an examination in which the plurality of targets 11 are sequentially viewed along the vertical direction of the display screen 37 are examined. When the visual acuity of the eye to be examined is inspected by sequentially showing the eye, the examination that is sequentially shown along the left-right direction, that is, a plurality of Landolt rings having the same visual acuity value, and the directions of the cut portions are different from each other When switching to the examination of visual acuity of the subject eye by sequentially showing a plurality of Landolt rings to the subject eye, by switching the row and column of each Landolt ring by operating the changeover switch, the display screen 37 is displayed. Without operating the examination selection switch to switch the display position of the refractive power display column 41, the refractive power display column 41 is displayed on the display screen 37 in the vertical direction. In view state to extend along, it is possible to inspect the visual acuity value is show in sequence a plurality of identical Landolt ring onto the eye.

  As a result, an examination using a plurality of Landolt rings having different visual acuity values and an examination using a plurality of Landolt rings having the same visual acuity values can be performed for each eye 11 displayed on the display screen 37 during examination. Since it can be performed by moving in the same moving direction without changing the moving direction, it is possible to reliably prevent the subject 12 from being confused by changing the moving direction of the eye to be examined for each examination. it can.

  In this embodiment, the images indicating the spherical power, the astigmatic power, the axial angle, the addition, the horizontal prism amount H, and the vertical prism amount V displayed in the refractive power display column 41 are the characters “spherical surface”. ”,“ Astigmatism ”,“ Axis ”,“ Join ”,“ Prism H ”, and“ Prism V ”. However, instead of this, images showing them are, for example, symbols, icons, etc. Thus, it can be composed of other than letters.

  In this case, when the eye to be examined sees the target 11 displayed on the display screen 37 at the time of examination, an image showing the astigmatism power, axial angle, addition, horizontal prism amount H, and vertical prism amount V entering the field of view. Can be made more difficult to read compared to the case where each image is composed of characters. As a result, it is possible to reliably prevent the target 11 from being viewed in a concentrated manner by reading a character that enters the field of view at the time of inspection.

  Furthermore, in this embodiment, when the display unit 25 is in the second display mode, the color densities of the lens data 34 and the refractive power display column 41 displayed on the display screen 37 are displayed on the display screen 37, respectively. It can be made thinner than the darkness of the color of the target 11 to be displayed.

  In this case, since the lens data 34 and the refractive power display column 41 displayed on the display screen 37 are less conspicuous than the visual target 11, the lens data 34 and the refractive power display column 41 that the subject does not need to visually recognize at the time of the examination. Can be reliably suppressed. Further, the target 11 to be visually recognized by the subject at the time of examination, the lens data 34 that does not need to be visually recognized, and the refractive power display column 41 are displayed on the same display screen 37 with the same color intensity. The uncomfortable feeling can be relieved surely.

1 is a perspective view schematically showing a subjective optometry apparatus according to the present invention. 1 is a block diagram schematically showing a subjective optometry apparatus according to the present invention. It is a top view which shows roughly the controller which concerns on this invention. It is a front view which shows roughly the state by which the display part concerning this invention was put into 1st display mode. It is a front view which shows roughly the state by which the display part concerning this invention was put into 2nd display mode. It is explanatory drawing which shows roughly the positional relationship of the subject, examiner, and controller which concern on this invention. FIG. 6 is a front view schematically showing a display screen according to an embodiment different from FIG. 5. It is a front view which shows roughly the display state of the refractive power display column to a display screen when test | inspecting along the up-down direction of a display screen. It is a front view which shows roughly the display state of the refractive power display column to a display screen when test | inspecting along the left-right direction of a display screen. FIG. 9 is a front view schematically showing an example in which a plurality of targets having sizes corresponding to different visual acuity values are arranged and displayed along the left-right direction of the display screen in the state shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Subjective optometry apparatus 11 Target 13 Target display part 14 Optical element arrangement | positioning apparatus (correction apparatus)
24 operation unit 25 display unit 28 control unit (CPU)
34 Optical element data (lens data)
37 Display screen 41 Display field (refractive power display field)

Claims (7)

  The optotype presenting unit for displaying various optotypes to be presented to the eye to be examined, and various optical elements, and the kind of the type corresponding to the response from the subject who viewed the optotype through the optical elements An optical element placement device for selectively placing an optical element between the eye to be examined and the optotype presenting unit, an operation unit operated to select the optotypes and the optical elements, and A first display mode for displaying the optical element data; and a display screen for displaying the optical element data of the optical target and the optical target selected by operation of the operation unit. A display unit that can switch between the second display modes to be displayed, and a control unit that controls the operations of the target presentation unit, the optical element placement device, and the display unit based on the operation of the operation unit. The control unit is configured such that the display unit is the second unit. In a state of being placed on the display mode, subjective optometric apparatus, characterized in that to display together with the optotype said optical element data on the display screen.   The subjective optometry apparatus according to claim 1, wherein the control unit continues to display the optical element data on the display screen while the display unit is in the second display mode.   The control unit displays the optical element data on the display screen when the operation unit is operated to select the optical element in a state where the display unit is in the second display mode. The subjective optometry apparatus according to claim 1, wherein:   The control unit displays the optical element data on the display screen based on the operation of the operation unit in a state where the display unit is in the second display mode, and the operation unit is not operated for a predetermined time. 4. The subjective optometry apparatus according to claim 3, wherein when this is detected, it is determined that the operation of the operation unit is finished, and the display of the optical element data is erased from the display screen.   The control unit displays the optical element data on the display screen at a position that does not interfere with the visual recognition of the target by the subject in a state where the display unit is in the second display mode. The subjective optometry apparatus according to any one of claims 1 to 4, characterized in that:   The display unit is disposed in front of the subject so that the display screen faces the subject, the examiner is located on the side of the subject, and the optical element data The display is displayed in a region located closer to the examiner than the center in the left-right direction of the display screen, and the target is displayed in a region other than the region on the display screen. 5. The subjective optometry apparatus according to 5.   The display screen is provided with a display field in which the optical element data is displayed. The display field displays a plurality of the targets on the display screen arranged in the vertical direction of the display screen. When the display screen is extended along the vertical direction of the display screen, and when the plural targets are arranged and displayed along the horizontal direction of the display screen on the display screen, the horizontal direction of the display screen The subjective optometry apparatus according to claim 5, wherein the optometry apparatus is disposed on the display screen so as to extend along the line.