JP5016348B2 - A subjective optometry device - Google Patents

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.

  2. Description of the Related Art Conventionally, a subjective optometry apparatus for examining a visual function such as eyesight of a subject's eye based on the response of the subject is known (for example, see Patent Document 1). This subjective optometry apparatus includes an optotype presenting unit that displays various optotypes presented to the eye to be examined, and a controller that controls the operation of the optotype presenting unit. The controller includes an operation unit operated to select a target to be presented to the eye to be examined, a display unit capable of displaying the target selected by the operation of the operation unit, and operations of the target presenting unit and the display unit And a control unit for controlling.

  When performing visual acuity examination of an eye to be examined using such a subjective optometry apparatus, a plurality of visual acuity values are set for each eye and are divided into a plurality of optotype groups for each predetermined number in order of magnitude of the visual acuity values. The visual acuity test target is used.

When any one of the plurality of target groups is selected by the operation of the operation unit, the control unit displays each target for visual acuity testing that constitutes the selected target group and the target presenting unit and display Each is displayed on the section. Thus, the examiner can easily confirm which target group is the target group presented to the eye by the target display unit by visually recognizing the target group displayed on the display unit. can do. In addition, when one of the targets displayed on the display unit is selected by the operation of the operation unit, the control unit displays each eyesight test for the target group displayed on the target display unit. A so-called masking is performed on each visual target so as to hide each visual test target other than the selected visual test for the visual test. Thereby, only the eyesight test target selected from the eyesight test targets displayed on the display unit can be presented to the eye to be examined.
JP 2002-143092 A

  However, since the same target group as the target group displayed on the target display unit is always displayed on the display unit, the visual acuity value of each target constituting the target group displayed on the display unit When a visual target corresponding to the maximum or minimum visual acuity value is selected, the visual acuity value is larger or smaller than the visual acuity value set for the selected visual target among the visual target groups displayed on the visual target presentation unit. The corresponding target is not displayed on the display unit unless the target group displayed on the display unit is switched to the target group before and after the target group.

  That is, for example, a target group composed of targets corresponding to visual acuity values of 0.2 [D], 0.3 [D], and 0.4 [D] is displayed on the target presentation unit and the display unit, respectively. When the target corresponding to 0.4 [D] is selected, the target with the visual acuity value of 0.5 [D] is not displayed on the display unit.

  For this reason, an examiner who conducts an inspection while visually recognizing the visual target displayed on the display unit has a visual acuity value corresponding to the maximum or minimum visual acuity value among the visual targets of the visual target group displayed on the display unit. When the target is selected, when the target corresponding to the visual acuity value larger or smaller than the visual acuity value corresponding to the target displayed on the target presenting unit is displayed on the target presenting unit, the target presenting unit It is not possible to confirm what form each of the targets displayed on the screen has.

  Accordingly, an object of the present invention is to provide a subjective optometry apparatus capable of confirming a visual target corresponding to the visual acuity values before and after the visual acuity value corresponding to the visual target displayed on the visual target presenting unit.

  In order to solve the above-mentioned problem, the invention according to claim 1 is capable of displaying an optotype presenting unit on which an optotype to be presented on the eye to be examined is displayed, and the optotype displayed on the optotype presenting unit. The display unit for the examiner, the control unit for controlling the operations of the optotype presenting unit and the display unit, and a plurality of the optotypes for visual acuity tests, each of which has a different visual acuity value, A target selecting means for selecting the target to be displayed on the target presenting unit from one target group among a plurality of target groups formed by dividing the predetermined target number in order of size; The control unit is configured to select the target when the target corresponding to the maximum or minimum visual acuity value is selected by the target selection unit among the targets constituting the target groups. In addition, when there are the respective visual targets corresponding to the visual acuity values before and after the visual acuity value of the visual target, When the target corresponding to any one of the visual acuity values before or after the visual acuity value of the selected visual target is displayed on the display unit, the visual target is displayed on the display unit. It is characterized by being displayed.

  The invention according to claim 2 is the invention according to claim 1, wherein when the selection by the target selection means is canceled, the control unit displays the target group including the selected target. It is characterized by being displayed on the optotype presenting unit and the display unit, respectively.

  The invention according to claim 3 is the invention according to claim 1 or 2, wherein the visual acuity value set for each target displayed on the display unit is displayed on each display target. The control unit displays the visual acuity value on the display unit when the display of the target on the target presentation unit is switched to another target. The display is switched corresponding to the switching of the display of each target on the unit.

  According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects, the control unit is selected by the target selection means from among the respective targets displayed on the display unit. It has an identification display means for displaying the said target and other said targets so that identification is possible.

  The invention according to claim 5 is the invention according to any one of claims 1 to 4, wherein the target presentation unit has a display screen composed of a liquid crystal panel, and the control unit is configured to select the target. The target selected by the means is displayed at the center of the display screen.

  According to the first aspect of the present invention, a plurality of visual fields formed by dividing a plurality of visual acuity test targets each having a different visual acuity value into a predetermined number in the order of the visual acuity values. When the target corresponding to the maximum or minimum visual acuity value is selected by the visual target selection means from the respective visual targets constituting the target group, the display unit displays the visual acuity values before and after the visual acuity value of the visual target. If there is a corresponding target, each target is displayed together with the selected target, and the target corresponding to one of the visual acuity values before or after the visual acuity value of the selected visual target. If there is, the target is displayed together with the selected target.

  From this, when a target corresponding to the maximum or minimum visual acuity value is selected from among the respective visual targets constituting one target group, it is displayed on the selected visual target, that is, the visual target presenting unit. The visual target corresponding to the visual acuity value larger or smaller than the visual acuity value set for the visual target can be displayed on the display unit.

  Thereby, for example, a target group composed of each target corresponding to a visual acuity value of 0.2 [D], 0.3 [D], and 0.4 [D] is displayed on the target presentation unit and the display unit, respectively. When a target corresponding to 0.4 [D] is selected when it is displayed, a target with a visual acuity value of 0.5 [D] and a target group including the target are displayed on the display unit. Without being displayed on the display unit.

  Therefore, the examiner who conducts the inspection while visually recognizing the target displayed on the display unit is required to select each target other than the target presented to the subject's eye among the targets included in the target group displayed on the target presenting unit. When a target corresponding to the maximum or minimum visual acuity value is selected from the respective visual targets of the visual target group displayed on the display unit in order to apply so-called masking to hide the visual target, When a target corresponding to a visual acuity value larger or smaller than the visual acuity value corresponding to the visual target displayed on the target presentation unit is displayed on the target presentation unit, the target displayed on the target presentation unit is It is possible to easily confirm what form the target has.

  In addition, since the target selected from the target group displayed on the display unit is displayed on the target presenting unit, the examiner can visually recognize the target displayed on the display unit as in the conventional case. Furthermore, it is possible to easily confirm which target is the target presented to the eye by the target presenting unit.

  Further, the control unit displays the selected target on the target presenting unit when any target among the targets displayed on the display unit is selected by the operation of the operation unit. In the same manner, only the target selected from the targets displayed on the display unit can be presented to the eye to be examined.

  According to the invention described in claim 2, when the selection by the target selection unit is canceled, the control unit displays the target group including the selected target on the target display unit and the display unit, respectively. Thus, in a state where no target is selected from the target group, the same target that constitutes the same target group is displayed on the target presentation unit and the display unit, respectively.

  As a result, for example, a visual target corresponding to a visual acuity value of 0.4 [D] is selected, that is, a visual target of 0.4 [D] is displayed on the visual target presenting unit, and 0.3 [D] is displayed on the display unit. , 0.4 [D], and 0.5 [D] are displayed, the target by the target selection means is canceled, and the target of 0.4 [D] is displayed on the target presentation unit. When a target group including is displayed, the state where each target of 0.3 [D], 0.4 [D], and 0.5 [D] is displayed on the display unit is not maintained. .

  Therefore, when the selection by the target selection means is canceled, the display of the target presentation unit and the display of the display unit are prevented from being different from each other. The examiner can easily confirm each target displayed on the target presenting unit by visually recognizing the display on the display unit.

  According to the third aspect of the present invention, the display of the visual acuity values displayed corresponding to the respective visual targets on the display unit has a visual acuity value different from that of the visual target displayed on the visual target presenting unit. When switching to another set target, that is, another target having a visual acuity value different from the visual value of each target is displayed at the display position of each target already displayed on the display unit. When displayed, the display of the visual acuity value on the display unit is switched corresponding to the switching of the display of each target on the display unit.

  As a result, for example, when visual targets are displayed in order of visual acuity values on the visual target presentation unit in order to inspect the visual acuity values in order, the visual targets displayed on the display unit are newly displayed on the display unit by sequentially switching. It can be easily confirmed which visual acuity corresponds to which visual acuity.

  According to the fourth aspect of the present invention, the visual target selected by the visual target selection unit among the respective visual targets displayed on the display unit, that is, the target displayed on the visual target presenting unit is displayed by the identification display unit. Thus, it can be distinguished from other visual acuity test targets.

  Accordingly, the examiner can easily determine which target is the target displayed on the target presenting unit among the plurality of targets displayed on the display unit.

  Therefore, in order to determine which target is the target used for the examination being performed, for example, the visual function test of the subject's eye proceeds more smoothly than when looking into the target presentation unit. can do.

  According to the fifth aspect of the present invention, the target selected by the target selecting means is displayed at the center of the display screen composed of the liquid crystal panel of the target presenting unit.

  For example, when a frame surrounding the display screen is provided in the optotype presenting unit, if the optotype is displayed at the end of the display screen of the optotype presenting unit, the optotype is close to the frame, When the subject looks at the visual target displayed on the display screen of the visual target presenting part during the visual function test, the frame is clearly seen. For this reason, the subject may be worried about the frame and may not be able to see the target in a concentrated manner.

  On the other hand, according to the present invention, as described above, since the optotype is displayed at the center of the display screen of the optotype presenting unit, a frame surrounding the display screen is provided on the display screen of the optotype presenting unit. Even if it is provided, the target is displayed on the display screen at a position away from the frame without approaching the frame, so that the subject can display the target displayed on the display screen of the target presentation unit. It is possible to prevent the frame from being clearly seen when viewing.

  Thereby, at the time of the test | inspection of a to-be-examined eye, the subject can concentrate on seeing a visual target reliably compared with the case where the said frame is clearly seen.

  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 23 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 various optotypes 11 are 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 determined by an operation of an operation unit 24 of the control device 15 described later.

  An optometry table 18 is arranged between the subject 23 and the optotype presenting unit 13, and the optometry table is provided with a support 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 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. Although not shown in the drawings, each housing 21a accommodates an annular lens disk in which lenses, which are a plurality of optical elements having different refractive powers, are provided along the circumferential direction. That is, the correction device 14 constitutes an optical element arrangement device that selectively arranges optical elements between the eye to be examined and the optotype presenting unit 13. Each lens is selectively arranged in each optometry window 22 by the rotation of the lens disk under the control of the control device 15.

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

  The control device 15 is placed on the optometry table 18 and is constituted by a personal computer P (hereinafter referred to as a personal computer) in the illustrated example.

  As shown in FIGS. 2 and 3, the personal computer P includes an operation unit 24 operated by an examiner 23 (see FIG. 1), and a display unit 25 on which an operation image described later for the operation unit is displayed. Have

  As shown in FIGS. 2 and 3, the display unit 25 includes a display screen 26 on which the above-described operation image indicating the contents set by operating each switch of the operation unit 24 is displayed.

  The display screen 26 is configured by a liquid crystal panel in the illustrated example. As shown in FIG. 4, the display screen 26 displays a refractive power display field 27 in which refractive powers such as spherical power, astigmatism power, and axial angle of the lens are displayed, and a display screen 16 of the target presentation unit 13. A list display field 29 for displaying a list of a plurality of target images 28 indicating the target 11 to be displayed is provided.

  In the example shown in the figure, the refractive power display column 27 shows items of spherical power, astigmatic power, axial angle, and addition of the refractive power of the lens.

  Further, the display screen 26 includes a target display field 30 in which the target 11 corresponding to the target image 28 selected from the list display field 29 as described later is displayed, and a visual acuity described later in the target display field. There are provided a plurality of visual acuity value display fields 31 for displaying visual acuity values (hereinafter referred to as inspection visual acuity values) set in the visual acuity inspection target when the inspection visual acuity 11a is displayed. Yes.

  In the illustrated example, each visual acuity value display column 31 is arranged on the right side of the visual target display column 30 corresponding to the symbol or the character displayed in the visual target display column.

  In addition, the display screen 26 is provided with images showing mask buttons M1, M2, and M3 for applying masks well known in the art to each row of a target group 11c to be described later. Each mask button M1, M2, M3 is provided between the target display column 30 and each visual acuity value display column 31, respectively, in the illustrated example.

  As shown in FIG. 3, the operation unit 24 includes an operation panel 32 provided with various switches for setting an examination, and a mouse 33 connected to the operation panel.

  The mouse 33 includes a left button 33a and a right button 33b that are so-called click operations that are push operations, and a dial 34 that is provided between the buttons 33a and 33b. As will be described later, the mouse 33 functions as a target selection unit that selects the target 11 to be displayed on the target presenting unit 13 from the target group 11c displayed on the display unit 25.

  When the mouse 33 is moved on the optometry table 18, for example, an arrow-like pointer 35 (see FIG. 4) displayed on the display screen 26 moves on the display screen 26 as is well known in the art.

  As will be described later, the dial 34 is rotated when changing numerical values such as the spherical power, the astigmatic power, and the shaft angle displayed in the refractive power display field 27 of the display screen 26.

  Further, the personal computer P includes an arithmetic control circuit 36 and an image output unit 37 as shown in FIG. The image output unit 37 is connected to the display unit 25 and the optotype presenting unit 13. The arithmetic control circuit 36 includes a CPU 38 and a memory unit 39.

  The memory unit 39 is connected to the CPU 38. The memory unit 39 includes the target data 40 indicating the various targets 11 used for various tests, the operation image data 42 indicating the operation image, and the lens data 43 indicating the refractive power of each lens. And are stored respectively.

  The operation image data 42 includes images indicating the refractive power display column 27, the list display column 29, the target display column 30 and the visual acuity value display column 31 displayed on the display screen 26 of the display unit 25, and each target. Each image 28 is included.

  The visual target data 40 includes a visual acuity test target 11a used for visual acuity inspection of the eye to be examined. As shown in FIG. 5A, the visual acuity test target 11a is composed of a Landolt ring 11b made up of the well-known letter “C”. As is well known in the art, each Landolt ring 11b has a size corresponding to the test visual acuity value for each test visual acuity value, and the size decreases as the test visual acuity value of the eye to be examined increases. . That is, each Landolt ring 11b has a different size for each corresponding inspection visual acuity value.

  In the illustrated example, each Landolt ring 11b having a size corresponding to the same inspection visual acuity value in each Landolt ring 11b is arranged in the row direction, that is, in the lateral direction, and corresponds to a different inspection visual acuity value in each Landolt ring 11b. Each Landolt ring 11b having such a size is arranged so that the inspection visual acuity value decreases in the row direction, that is, in the vertical direction.

  Each Landolt ring 11b is divided into three rows in the order of the inspection visual acuity values, and a plurality of Landolt rings 11b constituting the three rows respectively constitute one target group 11c. Each Landolt ring 11b is stored in the memory unit 39 for each target group 11c.

  Further, in the list display field 29 displayed on the display screen 26 of the display unit 24, as shown in FIG. 4, a plurality of visual acuity test target images 28a indicating the respective visual target groups 11c are displayed.

  Each visual acuity test target image 28a includes a visual target group 11c composed of Landolt rings 11b having inspection visual acuity values of 0.2 [D], 0.3 [D], and 0.4 [D]. Target group 11c composed of Landolt rings 11b having values of 0.5 [D], 0.6 [D], and 0.7 [D], and inspection visual acuity values of 0.8 [D] and 0.9 [D], 1.0 [D] each target group 11c composed of Landolt rings 11b, and examination visual acuity values 1.2 [D], 1.5 [D], 2.0 [D] The target group 11c composed of each Landolt ring 11b is shown.

  In the example shown in FIG. 2, the CPU 38 is connected to the operation unit 24 and the image output unit 37, and is further connected to a drive control unit (not shown) provided in the correction device 14.

  When the CPU 38 detects that the left button 33a of the mouse 33 is clicked with the pointer 35 placed on the refractive power display field 27 and the dial 34 of the mouse 33 is further rotated, the pointer 35 is moved. It is detected which of the items shown in the refractive power display column 27 is the item, and the refractive power stored corresponding to the rotational position of the dial 34 is stored in the lens data 43 of the memory unit 39. , And outputs a control signal indicating that the lens having the refractive power indicated by the extracted lens data is placed in the optometry window 22 of each phoropter 21 to the drive control unit of the correction device 14.

  Thereby, the lens having the refractive power selected by the operation of the mouse 33 is arranged in the optometry window 22 of each phoropter 21.

  When the CPU 38 is clicked on any item in the refractive power display field 27 and the dial 34 of the mouse 33 is further operated, the CPU 38 displays the refractive power indicated by the lens data 43 extracted from the memory unit 39 as the operation image data 42. Is output to the display unit 25 via the image output unit 37.

  As a result, the refractive power display field 27 of the display screen 26 of the display unit 25 displays the refractive power value of the lens selected by operating the dial 34 of the mouse 33 as shown in FIG.

  Further, for example, when the power of the subjective optometry apparatus 10 is switched from the OFF state to the ON state, the CPU 38 reads the operation image data 42 from the memory unit 39 and displays the operation image data on the display screen 26 of the display unit 25. A control signal to that effect is output to the display unit 25 via the image output unit 37.

  As a result, the display screen 26 of the display unit 25 includes the refractive power display column 27, each target image 28, the list display column 29, the target display column 30, and each visual acuity value display column 31 included in the operation image data 42. Each is displayed as shown in FIG.

  Further, in the illustrated example, the CPU 38 places a pointer 35 on one of the target images 28 of the target images 28 in the list display field 29 displayed on the display screen 26, and the mouse 33 is in this state. When it is detected that the left button 33a has been clicked, the target data 40 of the target 11 corresponding to the target image 28 selected by the click operation is extracted from the memory unit 39, and the extracted target data 40 is A control signal for displaying the target 11 to be displayed on the display screen 26 of the display unit 25 and the display screen 16 of the target presentation unit 13 is output to the display unit 25 and the target presentation unit 13 via the image output unit 37.

  Thereby, for example, among the plurality of target images 28, the target group 11c including the Landolt rings 11b having the inspection visual acuity values of 0.2 [D], 0.3 [D], and 0.4 [D]. As shown in FIG. 1 and FIG. 4, a mouse is displayed on the target display field 30 of the display unit 25 and the display screen 16 of the target display unit 13, respectively. The optotype group 11c selected by the operation 33 is displayed.

  Furthermore, when the CPU 38 detects that the optotype data 40 extracted from the memory unit 39 is the optotype data 40 indicating the optotype group 11c, the CPU 38 determines and determines the visual acuity value of each row of the optotype group 11c. The visual acuity value is extracted from the memory unit 39, and a control signal for displaying the extracted visual acuity value on the display screen 26 of the display unit 25 is output to the display unit 25 via the image output unit 37.

  Thereby, in each visual acuity value display column 31 of the display unit 25, visual acuity values corresponding to the respective rows displayed in the visual target display column 30 are displayed as shown in FIG.

  Further, when the CPU 38 detects that the target image 28 selected by the operation of the mouse 33 is the target image 28a for visual acuity test and any one of the mask buttons M1, M2, M3 is clicked, It is determined whether or not the mask buttons M1, M2, M3 are clicked.

  The CPU 38 determines that the mask buttons M1, M3 corresponding to the first row and the third row from the top of the target group 11c displayed in the target display column 30 among the mask buttons M1, M2, M3 are clicked. In other words, if the row selected by the examiner 23 to be presented to the eye to be examined is the second row, a control signal for masking the first row and the third row is displayed on the visual target presentation unit 13. The data is output via the output unit 37.

  As a result, the first and third rows are masked from the top of the target group 11c displayed on the display screen 16 of the target presentation unit 13, and each of the second row is configured as shown in FIG. Only the Landolt ring 11 b is displayed on the display screen 16.

  At this time, the display states of the visual target display column 30 and each visual acuity value display column 31 of the display unit 25 are set to the same display state as before the masking operation is performed, as shown in FIG.

  On the other hand, the CPU 38 clicks each of the mask buttons M1, M2 corresponding to the first and second rows from the top of the target group 11c displayed in the target display column 30 among the mask buttons M1, M2, M3. In other words, the row selected by the examiner 23 to be presented to the eye to be examined is composed of each Landolt ring 11b corresponding to the maximum visual acuity value in the target group 11c displayed in the target display column 30. When it is the third row and when it is determined that the mask buttons M2 and M3 corresponding to the second and third rows have been clicked, that is, the row selected by the examiner 23 to be presented to the eye to be examined is viewed. In the case of the first line composed of each Landolt ring 11b corresponding to the minimum visual acuity value in the target group 11c displayed in the target display column 30, the first and third lines, or the second and third lines Eye mask Only through the image output unit 37 to the target presenting unit 13 a control signal indicating that performing output.

  Thereby, for example, the mask buttons M1, M2 corresponding to the first and second rows from the top of the target group 11c having visual acuity values of 0.2 [D], 0.3 [D], and 0.4 [D]. Is clicked, as shown in FIGS. 5A and 7, the mask is injured in the first and second lines from the top of the target group 11 c displayed on the display screen 16 of the target presentation unit 13. Only each Landolt ring 11b having a visual acuity value of 0.4 [D] constituting the third row is displayed on the display screen 16.

  In addition, the CPU 38 determines that the mask buttons M1, M2, and M3 corresponding to the respective rows except the first row or the third row of the target group 11c displayed in the target display column 30 of the display unit 25 are clicked. In this case, the visual acuity value of each Landolt ring 11b constituting the first line or the third line is determined, and whether or not the row corresponding to the visual acuity value before and after the visual acuity value of each Landolt ring is stored in the memory unit 39. Determine whether.

  When the CPU 38 determines that the row corresponding to the visual acuity value before or after the visual acuity value of each Landolt ring 11b constituting the first row or the third row is stored in the memory unit 39, the first row Each Landolt ring 11b constituting the row corresponding to the visual acuity value after the visual acuity value, that is, the visual acuity value one step larger than the visual acuity value of the first row, and each Landolt ring 11b constituting the first row, or the third row Each Landolt ring 11b constituting a row corresponding to a visual acuity value before the visual acuity value, that is, a visual acuity value one step smaller than the visual acuity value of the third row, and each Landolt ring 11b constituting the third row are respectively displayed on the display unit. A control signal to be displayed in the 25 target display fields 29 is output to the display unit 25 via the image output unit 37.

  Thus, for example, the 2.0 [D] row constituting the third row is excluded from the target group 11c having the visual acuity values of 1.2 [D], 1.5 [D], and 2.0 [D]. When each of the mask buttons M1 and M2 corresponding to each row is clicked, that is, as shown in FIG. 5A, 1.2 [D], 1.5 [D], and 2.0 [D] When the examiner 23 selects the 2.0 [D] row of the optotype group 11c to present to the eye to be examined, the 2.0 [D] row is configured as shown in FIG. Each Landolt ring 11b and each Landolt ring 11b corresponding to a visual acuity value 1.5 [D] smaller than the visual acuity value of each Landolt ring 11b are displayed in the visual target display column 30 of the display unit 25, respectively. .

  On the other hand, when the CPU 38 determines that the memory unit 39 stores the rows corresponding to the visual acuity values before and after the visual acuity value of each Landolt ring 11b constituting the first row or the third row. The Landolt rings 11b constituting the first line or the third line and the Landolt rings 11b constituting the two lines corresponding to the visual acuity values before and after the visual acuity values of the first line or the third line are respectively displayed on the display unit 25. A control signal to be displayed in the target display column 29 is output to the display unit 25 via the image output unit 37.

  At this time, the target group 11c displayed in the target display column 30 before masking is made up of rows of 0.2 [D], 0.3 [D], and 0.4 [D]. In the case of the target group 11c, as shown in FIG. 5A, the CPU 38 extracts the row with the visual acuity value of 0.3 [D] before the row with the visual acuity value of 0.4 [D]. Although the target group 11c is included in the target group 11c, the target group 11c extracted by the CPU 38 is the row after the target unit whose visual acuity value is 0.4 [D]. Not included. For this reason, the CPU 38 extracts each Landolt ring 11b constituting a row having a visual acuity value of 0.5 [D] from the memory unit 39, and then outputs the control signal to the display unit 25.

  As a result, the display in the target display column 30 of the display unit 25 is switched from the state shown in FIG. 8A to the state shown in FIG. 8B. As shown in FIG. 8 (b), each Landolt ring 11b having a visual acuity value of 0.4 [D] constituting the row displayed on the optotype presenting unit 13, and a visual acuity value 0 before and after the visual acuity value of each Landolt ring. Each row composed of each Landolt ring 11b corresponding to 0.5 [D] and 0.6 [D] is displayed.

  At this time, the CPU 38 causes the display unit 25 to display a control signal indicating that the visual acuity value of each row of the target group 11 c to be displayed in the target display column 30 of the display unit 25 is displayed on the display screen 26 of the display unit 25. The data is output via the output unit 37.

  Thereby, the display of each visual acuity value display column 31 of the display unit 25 is switched from the state shown in FIG. 8A to the state shown in FIG. 8B, and each visual acuity value display column 31 has a target display. A visual acuity value corresponding to each line displayed in the column 30 is displayed.

  Further, in this embodiment, when the mask button M1, M2, M3 clicked to perform masking is clicked again, the CPU 38 corresponds to the re-operated mouse buttons M1, M2, M3. A control signal for canceling the masking applied to the line to be output is output to the optotype presenting unit 13 via the image output unit.

  Thereby, the mask removal applied to the target group 11c displayed on the display screen 16 of the target presentation unit 13 is released, and the display state of the display screen 16 is changed from the state shown in FIGS. The state returns to the state shown in FIG.

  Further, when the CPU 38 detects that any one of the mask buttons M1, M2, and M3 that have been clicked to perform masking is re-operated, the CPU 38 displays the screen on the display screen 16 of the target presentation unit 13. A control signal for displaying the target group 11c including the row on the target display field 30 is output to the display unit 25 via the image output unit.

  At this time, when the display state of the target display column 30 is the state shown in FIG. 4, the CPU 38 outputs a control signal for maintaining the display state to the display unit 25 via the image output unit.

  As a result, the target group 11c displayed when the mask is removed is displayed in the target display column 30.

  In addition, when the display state of the target display column 30 is the state shown in FIG. 8B, the CPU 38 stores the target group 11c including the row displayed on the display screen 16 of the target presentation unit 13 as a memory. After extraction from the unit 39, a control signal for displaying the extracted target group 11c on the target display column 30 is output to the display unit 25 via the image output unit.

  Thereby, the display state of the optotype display field 30 returns from the state shown in FIG. 8B to the state shown in FIG. 8A, and the visual acuity value 0.4 [D displayed on the optotype presenting unit 13 is displayed. ] Is displayed in the target display field 30 including the target group 11c.

  Furthermore, in the subjective optometry apparatus 10 according to the present invention, as shown in FIG. 2, among the three rows of the target group 11 c displayed in the target display column 30, the target optometry apparatus 10 is displayed on the display screen 16 of the target presentation unit 13. And an identification display means 44 for distinguishably displaying other lines and other lines.

  In the example shown in FIG. 2, the identification display means 44 is incorporated in the arithmetic control circuit 36 and is connected to the CPU 38 and the image output unit 37. In the example shown in the figure, the identification display means 44 is a visual target image 28a selected by the operation of the mouse 33 from the list display field 29 displayed on the display screen 26, and each mask button M1. , M2, M3 that the mask buttons M1, M2 corresponding to the first and second rows of the target group 11c or the mask buttons M2, M3 corresponding to the second and third rows are clicked. When detected, a control signal indicating that each of the upper region 30a and the lower region 30b (see FIG. 8B) in the target display column 30 is shaded is output to the image output unit 37.

  When the image output unit 37 receives a control signal indicating that each of the upper region 30a and the lower region 30b of the target display column 30 is shaded from the identification display means 44, the image output unit 37 performs image processing based on the control signal, and performs visual processing. An image signal indicating that the mesh 45 is displayed in the upper area 30 a and the lower area 30 b of the mark display field 30 is output to the display unit 25.

  Thereby, when the display of the target display column 30 of the display unit 25 is switched from the state shown in FIG. 8A to the state shown in FIG. 8B, the display is displayed on the display screen 16 of the target presentation unit 13. A net 45 is displayed in each of the upper region 30a and the lower region 30b in which the respective rows corresponding to the visual acuity values before and after the visual acuity value of the row are displayed.

  Since the examiner 23 can visually recognize each Landolt ring 11b displayed in the upper region 30a and the lower region 30b of the target display column 30 through the net 45, the net 45 hinders the visual recognition of each Landolt ring 11b. There is nothing.

  When examining the visual function of the eye to be examined using the subjective optometry apparatus 10 according to the present invention, the examiner 23 first displays a visual target image 28 indicating the visual target 11 used for the examination in the list display column 29 of the display unit 25. The selection is made as described above by operating the mouse 33. At this time, as described above, the target 11 corresponding to the selected target image 28 is displayed on the target display field 30 of the display unit 25 and the display screen 16 of the target presentation unit 13. The examiner 23 visually checks the target 11 displayed in the target display column 30 to determine whether or not the displayed target 11 matches the target 11 corresponding to the determined target image 28. Can be confirmed.

  Next, the examiner 23 causes the subject 23 to see the visual target 11 displayed on the display screen 16 of the visual target presenting unit 13 through each lens arranged in each optometry window 22, and the appearance of the visual target 11 is checked. listen. The examiner 23 switches the lens disposed in each optometry window 22 by operating the dial 34 of the mouse 33 based on the response of the subject 23. At this time, the refractive power of the lens set by operating the dial 34 is displayed in the refractive power display column 27 of the display unit 25 as described above. By switching the lens, the visual function of the eye to be examined is corrected, and the refractive power of the lens of the spectacles to be created can be determined.

  According to the present embodiment, as described above, the Landolt ring 11b corresponding to the maximum or minimum visual acuity value among the Landolt rings 11b constituting each of the plurality of target groups 11c should be displayed on the target presentation unit 13. When selected by operating the mouse 33, the target display column 30 of the display unit 25 includes the selected Landolt ring 11b and the Landolt rings 11b corresponding to the visual acuity values before and after the visual acuity value of the Landolt ring. In this case, each Landolt ring is displayed, and when there is a Landolt ring 11b corresponding to one of the visual acuity values before or after the selected Landolt ring 11b, the Landolt ring is displayed. The

  For this reason, masking is performed on each Landolt ring for hiding each Landolt ring 11b other than the Landolt ring 11b presented to the eye of the Landolt ring 11b of the target group 11c displayed on the target group presenting unit 13. When the Landolt ring 11b corresponding to the maximum or minimum visual acuity value is selected from the Landolt rings 11b of the visual target group 11c displayed on the display unit 25, the display screen 16 of the visual target presenting unit 13 is selected. A visual acuity value larger or smaller than the visual acuity value set for the selected Landolt ring 11 b, that is, the Landolt ring 11 b displayed on the optotype presenting unit 13, regardless of the masking position to each Landolt ring 11 b displayed in FIG. The Landolt ring 11b corresponding to can be displayed on the display unit 25.

  Accordingly, the examiner 23 who performs the inspection while visually recognizing the target 11 displayed on the display unit 25 switches the target group 11c displayed on the display unit 25 to the previous or next target group 11c. The Landmark ring 11b corresponding to the visual acuity value larger or smaller than the visual acuity value corresponding to the Landolt ring 11b displayed on the visual target presenting unit 13 is displayed when the visual target presenting unit 13 displays the Landolt ring 11b. It is possible to easily confirm what form each of the Landolt rings 11b displayed on the part has.

  In addition, since the optotype 11 selected from the optotype group 11c displayed on the display unit 25 is displayed on the optotype presenting unit 13, the examiner 23 visually recognizes the optotype 11 displayed on the display unit 25. By doing so, it is possible to easily confirm which target 11 is the target 11 presented to the eye to be examined by the target presenting unit 13 as in the past.

  Further, as described above, the CPU 38 displays the optotype group 11c including the Landolt ring 11b of the visual acuity values displayed on the optotype presenting unit 13 when the masking is released by the operation of the mouse 33. 13 and the display unit 25, respectively, the same Landolt ring 11b constituting the same target group 11c is respectively displayed on the target group 11c and the target group 11c when the target group 11c is not masked. It is displayed on the display unit 25.

  Thereby, for example, each Landolt ring 11b corresponding to a visual acuity value of 0.4 [D] is displayed on the optotype presenting unit 13 and 0.3 [D], 0.4 [D], 0. Displayed when the target group 11c including the target of 0.4 [D] is displayed on the target display unit by releasing the masking while the Landolt ring 11b of 5 [D] is displayed. The state where the Landolt rings 11b of 0.3 [D], 0.4 [D], and 0.5 [D] are displayed on the portion 25 is not maintained.

  Accordingly, since the display of the optotype presenting unit 13 and the display of the display unit 25 are prevented from being different from each other when the masking is released, the examiner 23 can display the display even when the masking is released. By visually recognizing the display of the unit 25, each target 11 displayed on the target presenting unit 13 can be easily confirmed.

  Further, as described above, the display of the visual acuity values displayed in correspondence with the respective visual acuity test targets 11a on the display unit 25 is the display of the visual acuity test visual target 11a on the visual target presenting unit 13. When switching to another visual acuity test target 11a in which a visual acuity value different from the visual target is set, that is, each visual acuity is displayed at the display position of each visual acuity test target 11a already displayed on the display unit 25. When another visual acuity test target 11a having a visual acuity value different from that of the test visual target is displayed, the visual acuity value display in the visual acuity value display column 31 of the display unit 25 is displayed on the display unit 25, respectively. The display is switched corresponding to the switching of the display of each visual acuity test target 11a.

  Thereby, for example, when the visual acuity test target 11a is displayed on the visual target presentation unit 13 in order of visual acuity values in order to inspect the visual acuity values sequentially, the visual acuity test target 11a displayed on the display unit 25 is sequentially switched. Thereby, it is possible to easily confirm which visual acuity test target 11a newly displayed on the display unit 25 corresponds to which visual acuity test target 11a.

  Further, as described above, each Landolt ring 11b constituting a row displayed on the visual target presenting unit 13 among the respective rows displayed on the display unit 25 is constituted by another display row by display by the identification display means 44. Each Landolt ring 11b can be identified.

  As a result, the examiner 23 sets each Landolt ring 11b displayed on the optotype presenting unit 13, that is, each Landolt ring 11b used for the examination being performed, of the plurality of Landolt rings 11b displayed on the display unit 25. It is possible to easily determine which Landolt ring 11b.

  Therefore, in order to determine which Landolt ring 11b used for the examination being performed is which Landolt ring 11b, for example, the eye to be examined is compared with the case of looking into the display screen 16 of the optotype presenting unit 13. The visual function test can be smoothly advanced.

  In the present embodiment, when masking is performed on two of the rows of the target group 11c displayed on the display screen 16 of the target presenting unit 13, it is presented to one eye that is not masked, that is, the eye to be examined. In this example, the line selected by the examiner 23 is displayed on the display screen 16 at the same position as before the mask is removed. Instead, the line is selected as shown in FIG. Can be displayed at the center of the display screen 16 of the optotype presenting unit 13.

  In this case, the image output unit 37 receives a control signal for masking two rows of the target group 11c corresponding to the target image when the target image 28a for eyesight inspection is selected. And each Landolt ring 11b constituting one line other than each line is subjected to image processing so as to be displayed in the center of the display screen 16 of the visual target presenting unit 13, and then each Landolt ring 11b constituting the one line is viewed. An image signal to be displayed on the display screen 16 of the sign presentation unit 13 is output to the visual chart presentation unit 13. Thereby, as shown in FIG. 9, each Landolt ring 11b which comprises the line selected by the examiner 23 to display to an eye to be examined is displayed in the center part of the display screen 16 of the optotype presenting unit 13. The

  For example, when the target presentation unit 13 is provided with a frame 16a surrounding the display screen 16 as shown in FIG. 1, if each Landolt ring 11b is displayed at the end of the display screen 16, each Landolt ring 11b is displayed. Is close to the frame 16a, the frame 16a is clearly seen when the subject 23 looks at each Landolt ring 11b displayed on the display screen 16 during the visual function test of the subject's eye. For this reason, the subject 23 may not be able to concentrate on the Landolt ring 11b to be viewed because he / she is concerned about the frame 16a.

  On the other hand, according to the present invention, as described above, each Landolt ring 11b is displayed at the center of the display screen 16 of the optotype presenting unit 13, and therefore the display screen 16 is surrounded by the optotype presenting unit 13. Even if the frame 16 a is provided, each Landolt ring 11 b is displayed on the display screen 16 at a position away from the frame without being close to the frame 16 a, so that the subject 23 is displayed on the display screen 16. Further, when the Landolt ring 11b is viewed, the frame 16a is prevented from being clearly seen.

  As a result, when examining the subject's eye, the subject 23 can more reliably see the Landolt ring 11b to be seen than when the frame 16a is clearly visible.

  Further, since each Landolt ring 11b constituting one selected row among the three rows constituting the target group 11c is displayed on the display screen 16 of the target presentation unit 13, the display screen of the target presentation unit 13 is displayed. 16, only the Landolt ring 11b used for the inspection can be displayed.

  Thereby, when the Landolt ring 11b displayed on the display screen 16 of the optotype presenting unit 13 is shown to the eye to be examined, each Landolt ring 11b that is not used for the examination is surely prevented from entering the field of view of the eye to be examined. be able to.

  Accordingly, the subject is prevented from being confused by preventing each Landolt ring 11b constituting a row other than the row to be viewed from among the rows constituting each target group 11c from entering the field of view. Each Landolt ring 11b can be viewed in a concentrated manner.

  Thereby, the visual function of the eye to be examined can be measured more reliably and accurately as compared with the case where the Landolt ring 11b that is not used for the examination is displayed on the display screen 16 of the optotype presenting unit 13.

  In this embodiment, the mask buttons M1, M2, and M3 that have been clicked to perform masking are clicked again to apply to the rows corresponding to the re-operated mouse buttons M1, M2, and M3. However, instead of or in addition to this, for example, a release button for releasing the masking can be provided. The release button can be provided on the operation unit 24, for example.

  Furthermore, in the present embodiment, an example has been shown in which the optotype presenting unit 13 includes the display screen 16 configured by a liquid crystal panel that displays the optotype 11, but instead, a plurality of the optotypes 11 are described. An optotype presenting unit having a display window on which the optotype panel is selectively arranged, an optotype presenting unit having a screen and a chart projector that projects the target on the screen, and the like can be applied to the present invention.

  In this case, the operation of the drive source for driving the target panels and the operation of the chart projector can be controlled by the arithmetic control circuit 36, respectively.

  In this embodiment, when the Landolt ring 11b corresponding to the maximum or minimum visual acuity value of each target group 11c is selected for all visual acuity values, the selected Landolt ring 11b and the visual acuity of the Landolt ring are selected. An example is shown in which each Landolt ring 11b corresponding to the visual acuity values before and after the value is displayed in the target display column 30 of the display unit 25, but instead, for example, 0.5 to 1.0 [D] When the Landolt ring 11b corresponding to the visual acuity value relatively frequently used for the inspection is selected, such as within the range, the Landolt ring 11b can be displayed on the display unit 25 as described above.

  Further, in the present embodiment, the identification display means 44 uses the visual target image 28a as the visual target image 28a selected as described above by operating the mouse 33 from the list display field 29 displayed on the display screen 26. There are mask buttons M1, M2 corresponding to the first and second lines of the target group 11c, or mask buttons M2, M3 corresponding to the second and third lines, respectively. An example is shown in which when the click operation is detected, a control signal indicating that the upper area 30a and the lower area 30b in the target display column 30 are shaded is output to the image output unit 37. Instead, for example, a switching button for switching between a display mode in which the mesh 45 is displayed in the upper region 30a and the lower region 30b of the target display column 30 and a non-display mode in which the mesh 45 is not displayed is illustrated. For example, when a switching operation is performed in which the switching button is switched from the non-display mode to the display mode, a control signal indicating that the upper area 30a and the lower area 30b of the target display column 30 are shaded respectively. Can be output from the identification display means 44 to the image output unit 37.

  In the present embodiment, the upper region 30a and the lower region 30b of the target display column 30 are shaded, so that the rows displayed on the target display unit 13, that is, the central region 30c ( In FIG. 6), an example is shown in which each Landolt ring 11b constituting a row displayed in each row is identified from each Landolt ring 11b constituting another row. Alternatively, or in addition to this, By making the background color of the upper region 30a and the lower region 30b of the target display column 30 different from the central region 30c, or by attaching a frame surrounding each of the upper region 30a and the lower region 30b of the target display column 30. Each Landolt ring 11b constituting a row displayed on the optotype presenting unit 13 can be distinguished from each Landolt ring 11b constituting another row.

  In this case, the identification display means 44 is different in the background color of the upper region 30a and the lower region 30b of the target display column 30 from the central region 30c where each Landolt ring 11b to be displayed on the target display unit 13 is displayed. A control signal indicating that the upper region 30a and the lower region 30b of the target display column 30 are respectively provided with a frame surrounding the upper region 30a and the lower region 30b, respectively. The image is output to the image output unit 37.

  Furthermore, in the present embodiment, an example in which the control device 15 is configured by the personal computer P has been shown, but instead, the control device 15 can be configured by a controller C as shown in FIG.

  In the illustrated example, the controller C is similar to the personal computer P, the operation unit 46 operated by the examiner 23 (see FIG. 1), the display unit 48 having the display screen 47, and the same as that provided in the personal computer P. And an image output unit 37 (see FIG. 2). In the arithmetic control circuit 36, the identification display means 44 is incorporated as described above.

  The display screen 47 of the display unit 48 is configured by a liquid crystal panel in the illustrated example, and the display screen 47 includes a refractive power display column 27, a list display column, as with the display screen 26 of the personal computer P (not shown). 29 and a target display column 30 are provided.

  The operation unit 46 includes an operation panel 49. The operation panel 49 is provided with an annular dial switch 50 that is rotated and a conventionally well-known feed button 51 disposed inside the dial switch. The dial switch 50 corresponds to the dial 34 of the mouse 33 in the example shown in FIGS. 1 to 9, and the feed button 51 corresponds to the left button 33a of the mouse 33 in the example shown in FIGS.

  In this case, the arithmetic control circuit 36 controls the operations of the correction device 14, the target presentation unit 13, and the display unit 48 based on the operation of the dial switch 50 and the feed button 51 of the operation unit 46.

  Further, in the present embodiment, an example in which the target selection means is configured by the mouse 33 is shown, but instead of this, a desired target is obtained from each row of the target group 11c displayed in the target display column 30 of the display unit 25. Any means other than the mouse 33 can be used as the target selection means as long as it is a means capable of selecting the row.

  Furthermore, in the present embodiment, an example in which the visual acuity test target 11a is composed of the Landolt ring 11b has been shown. Can be configured.

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. 1 is a front view schematically showing a personal computer according to the present invention. It is a front view which shows roughly the display screen of the display part which concerns on this invention. (A) is explanatory drawing which shows roughly the optotype for visual acuity examination which concerns on this invention, (b), (b) is the visual acuity value with the largest or smallest visual acuity value among each line of an optotype group. It is explanatory drawing which shows roughly the display position of the target on a display part when the line corresponding to is selected. It is a front view of the display screen of the optotype presenting unit schematically showing a state in which masking is applied to the first and third lines of the optotype group. It is a front view of the display screen of the optotype presenting part schematically showing a state in which masking is applied to the first and second lines of the optotype group. (A) is explanatory drawing which shows roughly the display state of the optotype display column in the state shown in FIG. 6, (b) schematically shows the display state of the optotype display column in the state shown in FIG. It is explanatory drawing shown. FIG. 6 schematically shows a state in which a row selected from each row of the target group displayed in the target display column of the display unit is displayed at the center of the display screen of the display unit. 1 is a perspective view schematically showing a controller according to the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Subjective optometry apparatus 11 Visual target 13 Visual target presentation part 25 Display part 36 Control part (arithmetic control circuit)
11c Target group 33 Target selection means (mouse)
44 Identification display means

Claims (5)

  An optotype presenting unit that displays an optotype to be displayed on the eye to be examined, a display unit for an examiner that can display the optotype displayed on the optotype presenting unit, the optotype presenting unit, and the display unit And a plurality of visual fields formed by dividing a plurality of visual targets for visual acuity tests, each of which has a different visual acuity value, into a predetermined number in order of the magnitude of the visual acuity values. Target selection means for selecting the target to be displayed on the target presentation unit from the target group of one of the target groups, and the control unit is configured to display each of the visual targets constituting each target group. When the target corresponding to the maximum or minimum visual acuity value among the targets is selected by the target selection means, the target corresponding to the visual acuity values before and after the visual acuity value of the target together with the selected visual target. If there are each target, display each target on the display unit Visual acuity testing apparatus, characterized in that to display the convergent target on the display unit if there is the optotype corresponding to one visual acuity value one of before or after the visual acuity value of the optotype.   The control unit displays the target group including the selected target on the target presentation unit and the display unit, respectively, when the selection by the target selection unit is canceled. Item 4. The subjective optometry apparatus according to Item 1.   In the display unit, the visual acuity value set for each target displayed on the display unit is displayed corresponding to each target, and the control unit displays information on the target presenting unit. When the display of the target is switched to another target, the display of the visual acuity value on the display unit is switched corresponding to the switching of the display of each target on the display unit. The subjective optometry apparatus according to claim 1 or 2.   The control unit has an identification display unit for displaying the target selected by the target selection unit among the respective targets displayed on the display unit and the other target in a distinguishable manner. The subjective optometry apparatus according to any one of claims 1 to 3.   The said target presentation part has a display screen which consists of a liquid crystal panel, The said control part displays the said target selected by the said target selection means on the center part of the said display screen, It is characterized by the above-mentioned. 5. The subjective optometry apparatus according to any one of 1 to 4.