JP4916753B2 - 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.

  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 includes an optotype presenting apparatus that presents various optotypes to the subject's eye, and a plurality of correction lenses that are optical elements for correcting the visual function of the subject's eye. Optical element placement device for selectively placing a correction lens having a refractive power according to the response from the eye to be examined and the target presentation device, and a controller for controlling the operation of the target presentation device and the optical device placement device With. In this subjective optometry apparatus, a plurality of types of examinations can be performed, and each examination is executed using a set target.

The controller includes a dial that is rotated to select a corrective lens, and display means for displaying the value of the refractive power of the corrective lens selected by operating the dial. The display means includes a dial image corresponding to the dial, a direction indicating image indicating the rotation direction of the dial, and an increase / decrease indicating image arranged corresponding to the direction indicating image and indicating increase / decrease in the value of the refractive power of the correction lens. Is displayed.

When examining the visual function of the subject's eye, the examiner asks what the subject looks like as a result of viewing the target presented on the target presentation device through the correction lens. Based on the response from the person, the dial image, the direction indication image, and the increase / decrease indication image displayed on the display means are visually recognized and the dial is operated to change the refractive power value displayed on the display means. As a result, the correction lens is switched to a correction lens according to how the eye is viewed, the visual function of the eye is corrected, and the refractive power value of the eyeglass lens to be created can be determined.

  However, from the increase / decrease instruction image displayed on the display means, it can only be determined that the refractive power value of the correction lens increases / decreases in accordance with the rotation direction of the dial, and is used for the inspection at each inspection. How the optotype can be seen by the eye to be examined, and how the refractive power value of the correcting lens is increased or decreased to correct the appearance of each optotype when it is seen by the eye to be examined Since it is impossible to determine in which direction the dial should be rotated, in which direction the dial should be rotated, it is necessary for the examiner to memorize those matters accurately.

  For example, if the examiner's skill level is low and the examiner does not accurately memorize the appearance of each optotype and the rotation direction of the dial according to the appearance of each optotype, Inquiries and dial operations cannot be performed properly, leading to erroneous measurement of the visual function of the eye to be examined.

  Therefore, an object of the present invention is to cause an erroneous measurement of the visual function of the eye to be inspected because the examiner does not accurately store the appearance of each target and the rotation direction of the dial according to the appearance of each target. It is an object of the present invention to provide a subjective optometry apparatus that can accurately measure the visual function of an eye without examination.

In order to solve the above-mentioned problem, the invention according to claim 1 is directed to a target presentation device that presents various visual targets used for various examinations of visual functions of an eye to be examined to the eye to be examined, Various optical elements for correcting visual function are held, and each optical element is selectively disposed between the eye to be examined and the optotype presenting apparatus, and the optical elements are disposed through the optical elements. A dial that is rotated to select and operate the optical element of the type corresponding to the response from the subject who has seen the optotype, a dial image corresponding to the dial , and a dial image disposed on the left side of the dial image A direction indication image having a counterclockwise arrow indicating a counterclockwise rotation direction of the dial and a clockwise arrow indicating a clockwise rotation direction of the dial arranged on the right side of the dial image is displayed. Display means ,
In a subjective optometry apparatus that includes an arithmetic control circuit that causes the display means to display and control the dial image and the arrow, the arithmetic control circuit is configured to correct the visual function of how the visual target is viewed by the eye to be examined. A first state image showing the same appearance as the appearance that needs to be rotated counterclockwise is positioned on the left side of the counterclockwise arrow and displayed on the display means, and the eye to be examined A second state image showing the same appearance as the appearance of the optotype by the right view in order to correct the visual function is displayed on the right side of the clockwise arrow. It is made to position and it displays on the said display means, It is characterized by the above-mentioned .

According to a second aspect of the present invention, in the first aspect, the first and second state images each include a plurality of lines, and the first state is obtained when the dial is rotated counterclockwise. An arrow indicating the moving direction of the line in the direction in which the appearance of the image changes is displayed in the first state image, and the appearance of the second state image when the dial is rotated clockwise. An arrow indicating the moving direction of the line in the direction in which the angle changes is displayed in the second state image .

  According to a third aspect of the present invention, in the first or second aspect of the present invention, the state image is displayed on the display means for each type of the inspection.

  According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects, the state image shows a shape of the visual target that can be seen by the eye to be examined.

According to the first aspect of the present invention, the state image indicating the shape that can be seen by the eye of the target used for the examination to be performed is displayed on the display unit according to how the target is seen. Since the direction indicator image (instruction arrow) corresponding to the direction in which the dial should be rotated to correct the dial is displayed, the examiner visually recognizes the state image displayed on the display means, How the target used for the inspection can be seen at the time of inspection, and how to rotate the dial in any direction to correct the appearance of each target It can be easily judged whether it is good.

  As a result, it is not necessary for the examiner to accurately memorize the appearance of each optotype and the rotation direction of the dial according to the appearance of each optotype, so even if the proficiency level of the examiner is low, It is surely prevented that a person erroneously measures the visual function of the subject's eye as in the past by not memorizing exactly how each target looks and how the dial rotates according to each target's appearance. can do.

  Therefore, the visual function of the eye to be inspected can be measured more accurately than in the conventional case where the dial is rotated only in accordance with the increase / decrease instruction image displayed on the display means.

According to the first and second aspects of the present invention, the direction indicating images are each composed of a pair of arrows arranged on the left and right of the dial image and facing in opposite directions, and the state images correspond to the respective arrows. And shows how the target is corrected when the dial is rotated in the direction of each arrow, so that the examiner compares each arrow displayed on the display means with the state image at the time of examination. In which direction can the eye to be examined be corrected in the state shown in the state image placed corresponding to each arrow when the dial is rotated in the direction of viewing? Can be determined more easily.

  According to the invention described in claim 3, since the state image is displayed on the display means for each type of examination, even when different types of targets are used for each of the plurality of examinations, Since the state image corresponding to the target used for each examination is displayed on the display means, the examiner determines the appearance of each target and the rotation direction of the dial according to the appearance of each target for each type of examination. There is no need to memorize it accurately. Thereby, even when different types of visual targets are used for each of a plurality of examinations, erroneous operation of the dial and erroneous measurement of the visual function of the eye to be examined can be more reliably prevented.

  According to the fourth aspect of the present invention, since the state image shows a shape that can be seen by the eye to be examined, the examiner can more easily visually recognize the state image during the examination.

  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 corrects the visual function of an eye to be examined, and an optotype presenting apparatus 13 for presenting various visual targets 11 to the subject's 12 eye. And a correction device 14 for performing the above. 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 apparatus 13 includes a presenting apparatus main body 17 provided with a display window 16 on which the optotype 11 is displayed. The target 11 displayed on the display window 16 is selected by an operation of the controller 15 described later.

  An optometry table 18 is disposed on the subject 12 side of the optotype presenting apparatus 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. 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 arrangement device that selectively arranges optical elements between the eye to be examined and the visual target presentation device 13. Each correction lens is selectively disposed in each optometry window 22 by rotation of the lens disk under the control of the controller.

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

  The controller 15 is placed on the optometry table 18, and as shown in FIGS. 2 and 3, the arithmetic control circuit 25, the operation unit 27 operated by the examiner 26 (see FIG. 1), And a display unit 28 which is a display means electrically connected to the operation unit. The operation unit 27 and the display unit 28 are each connected to the arithmetic control circuit 25.

  The arithmetic control circuit 25 includes a CPU 23, a memory unit 24, and an image processing unit 29 for processing an image displayed on the display unit 28. The CPU 23 is connected to a drive control unit (not shown) provided in each of the correction device 14 and the target presentation device 13. The memory unit 24 includes data indicating refractive power obtained by subjective examination or objective examination, and glasses showing refractive power such as spherical power, astigmatism power, and axial angle of the subject's eye when the glasses currently in use are naked. Various inspection data such as data is stored. The CPU 23 controls the arrangement of the correction lenses in the optometry windows 22 in accordance with the contents of examination data extracted from the memory unit 24 as described later. The memory unit 24 stores programs for executing a plurality of types of inspections such as a sphericity test and an astigmatism test.

  As shown in FIG. 3, the operation unit 27 rotates when changing numerical values of refractive power such as spherical power, astigmatic power, and axial angle displayed in a data display field 37 of a display screen 32 described later of the display unit 28. An operation panel 31 provided with a dial 30 to be operated and a conventionally well-known mouse M connected to the operation panel are provided.

  When the dial 30 of the operation panel 31 is operated, a control signal is sent from the CPU 23 to the drive control unit of the correction device 14, whereby the correction lens having the refractive power set by the operation of the dial 30 is transferred to each phoropter. It is arranged in 21 optometry windows 22.

  The display unit 28 has the above-described display screen 32 that displays the contents set by operating each switch of the operation panel 31 of the operation unit 27.

  The display screen 32 is composed of a liquid crystal panel in the illustrated example. As shown in FIG. 4, the display screen 32 includes a list display column 33 in which a list of the targets 11 displayed in the display window 16 of the target presentation device 13 is displayed, and a list display column 33 to be used for examination. A target display field 34 for displaying the selected target 11 is provided.

  The display screen 32 also includes an examination name display field 35 for displaying the type of examination performed using the target 11 displayed in the target display field 34, and examination data used for the examination. The examination data name display field 36 for displaying the type, and the contents of the examination data displayed in the examination data name display field, that is, the spherical power, the astigmatism power of the correction lens arranged in the optometry window 22 of each phoropter 21, and The data display field 37 for displaying the refractive power such as the shaft angle is provided.

  For each target 11 displayed in the list display column 33, the type of inspection and the type of inspection data performed using each target are set for each target 11. That is, each examination is executed using the target 11 specific to each examination type.

  Furthermore, the display screen 32 according to the present invention is provided with a dial navigation unit 38 for guiding the rotation direction of the dial 30 when operating the dial 30.

In the illustrated example, the dial navigation unit 38 displays a dial image 39 indicating the dial 30 and a direction indication image 40 indicating the rotation direction of the dial 30. In the example shown in the figure, the direction indicating image 40 is composed of a pair of arrows 41a and 41b that are marked in opposite directions. The arrows 41a and 41b are arranged on the left and right of the dial image 39, respectively.

Further, the dial navigation unit 38 displays a state image 42 indicating a state that can be seen with the eye to be examined of the target 11 used for the examination to be performed for each type of examination to be performed. The state image 42 corresponds to the arrows 41a and 41b of the direction indication image 40 corresponding to the direction in which the dial 30 should be rotated in order to correct the visual function of the eye to be examined according to how the visual target 11 is seen by the eye to be examined. Arranged. A state image 42 corresponding to each target 11 is stored in the memory unit 24 for each type of examination.

  In this embodiment, for example, the target 11 is measured by the eye 11 when measuring the spherical power using the visual acuity table 11a composed of a character string as displayed in the target display column 34 shown in FIG. When measuring whether or not the visual target 11a is visible instead of measuring how it looks, or when performing an inspection using the visual target 11 for which the state image 42 is not registered, the state image As shown in FIG. 4, an image 43 showing the increase / decrease in the refractive power value of the correction lens is used for 42.

  When examining the visual function of the subject's eye of the subject 12, the subject 12 corrects each of the corrections in which the optotype 11 displayed on the display window 16 of the optotype presenting device 13 is arranged in each optometric window 22. It looks through the lens and responds to the examiner 26 with the appearance. The examiner 26 switches the correction lens arranged in each optometry window 22 by operating the operation unit 27 based on the response of the subject 12. Thereby, 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.

  The conventional well-known eyesight shown in FIG. 5, which is a target for executing the oblique examination, is performed 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 selected cross chart 11b is selected from the list display field 33. As shown in FIG. 5, the cross chart 11 b includes a vertical line 44 and a horizontal line 45 arranged so as to be orthogonal to each other.

  When selecting the cross chart 11b from the list display column 33, a click operation is performed by pressing the left button Ma (see FIG. 3) of the mouse M on the cross chart 11b. At this time, when the CPU 23 of the arithmetic control circuit 25 detects that a click operation has been performed on the cross chart 11b displayed in the list display field 33, the CPU 23 displays the cross chart 11b in the target display field 34. A control signal indicating that the inspection type and the inspection data type set in 11b are displayed in the inspection name display field 35 and the inspection data name display field 36 is sent to the display unit 28. In addition, the CPU 23 extracts data corresponding to the inspection data displayed in the inspection data name display field 36 from the memory unit 24, and sends a control signal to the display unit 28 indicating that the data is displayed in the data display field 37. send. Thereby, the target 11 displayed in the target display column 34 is switched to the cross chart 11b, and the display of the examination name display column 35, the examination data name display column 36, and the data display column 37 is switched.

  Further, when the CPU 23 detects that the cross chart 11b is selected by a click operation from the list display column 33, the drive control unit of the visual target presentation device 13 outputs a control signal for displaying the cross chart 11b on the display window 16. Send to. Thereby, the cross chart 11b is displayed on the display window 16 of the optotype presenting apparatus 13.

  Further, when the CPU 23 extracts the data corresponding to the inspection data set in the cross chart 11b from the memory unit 24, the CPU 23 arranges the correction lens having the refractive power corresponding to the data in the optometry window 22 of each phoropter 21. Is sent to the drive control unit of the correction device 14. As a result, the correction lens having the refractive power corresponding to the inspection data set in the cross chart 11 b in the optometry window 22 of each phoropter 21 of the correction device 14, that is, the data displayed in the data display field 37, is displayed in each optometry window 22. Be placed. In the oblique position inspection using the cross chart 11b, the correction lens arranged in the optometry window 22 of the phoropter 21 corresponding to the right eye of the subject 12 is polarized light (not shown) parallel to the vertical line 44 of the cross chart 11b. A lens is used, and a polarizing lens (not shown) parallel to the horizontal line 45 of the cross chart 11b is used as the correction lens disposed in the optometry window 22 of the phoropter 21 corresponding to the left eye of the subject 12. Thereby, only the vertical line 44 of the cross chart 11b can be shown on the right eye of the subject 12, and only the horizontal line 45 of the cross chart 11b can be shown on the left eye.

  Further, when the CPU 23 detects that the cross chart 11b is selected from the list display field 33, the CPU 23 extracts the state image 42 corresponding to the cross chart 11b from the memory unit 24, and the extracted state image 42 is dialed on the display screen 32. A control signal indicating to be displayed on the navigation unit 38 is sent to the image processing unit 29. The image processing unit 29 performs image processing in the dial navigation unit 38 based on a control signal from the CPU 23, and displays a state image 42 corresponding to the cross chart 11 b in the dial navigation unit 38.

  When executing the horizontal oblique inspection for measuring the horizontal oblique degree of the subject 12 among the oblique inspections, the CPU 23 is pressed by pressing a horizontal button 46 (see FIG. 3) provided on the operation panel 31. Under the control, the inspection mode is switched to the horizontal oblique inspection mode. In this case, as shown in FIG. 6A, a state image 42 showing a shape that can be seen with the eye of the cross chart 11b is displayed in the dial navigation unit 38.

In the example shown in FIG. 6A, the state image 42 is displayed corresponding to the arrow 41b displayed on the right side of the dial image 39, and the vertical line 44 is shifted to the right side with respect to the central portion of the horizontal line 45. An image 47a showing the cross chart 11b and an image showing the cross chart 11b displayed in correspondence with the arrow 41a displayed on the left side of the dial image 39 and in which the vertical line 44 is shifted to the left with respect to the center of the horizontal line 45. 47b. This image 47b shows a first state in which the vertical line 44 is shifted to the left with respect to the central part of the horizontal line 45, and an image 47a shows a second state in which the vertical line 44 is shifted to the right with respect to the central part of the horizontal line 45. It can be said that the state image 42 includes an image 47b that is the first state image on the arrow 41a side and an image 47a that is the first state image on the arrow 41b side.

  When the horizontal oblique test is performed, if the eye to be examined has an internal oblique tendency, the vertical line 44 appears to be shifted to the right with respect to the central portion of the horizontal line 45 in the examined eye. On the other hand, when the eye to be examined tends to be obliquely inclined, the vertical line 44 appears to be shifted to the left with respect to the central portion of the horizontal line 45 in the eye to be examined. In the case of correcting the internal oblique position, in addition to the deflecting lens, a well-known Base-Out prism is added in addition to the deflecting lens in the optometry window 22 and when correcting the external oblique position, Although not shown, a well-known Base-In prism is added and arranged.

  Accordingly, when measuring the horizontal oblique position, the examiner 26 visually recognizes the state image 42 shown in FIG. 6A displayed on the dial navigator unit 38, so that “the position of the vertical line is the center of the horizontal line. "Which side is left or right with respect to the part?" It is understood that the subject 12 should be asked, and if the vertical line 44 appears to be shifted to the right, the dial 30 may be turned to the right. When the vertical line 44 appears to be shifted to the left side, it can be easily understood that the dial 30 should be turned to the left.

  For example, when the dial 30 is turned to the right to correct the internal oblique position, when the CPU 23 detects that the dial 30 is turned to the right, the CPU 23 places the Base-Out prism in the optometry window 22 of each phoropter 21. A control signal indicating this is sent to the drive control unit of the correction device 14. Thereby, the Base-Out prism is arranged in the optometry window 22 of each phoropter 21 of the correction device 14.

  When executing the vertical oblique inspection for measuring the vertical inclination of the subject 12 in the oblique inspection, the CPU 23 is pressed by pressing a vertical button 48 (see FIG. 3) provided on the operation panel 31. Under the control, the inspection mode is switched to the vertical oblique inspection mode. In this case, a state image 42 as shown in FIG. In the example shown in FIG. 6B, the state image 42 is displayed corresponding to the arrow 41 b displayed on the right side of the dial image 39, and the horizontal line 45 is shifted downward with respect to the central portion of the vertical line 44. The cross chart 11b is displayed corresponding to the image 49a showing the cross chart 11b and the arrow 41a displayed on the left side of the dial image 39, and the horizontal line 45 is shifted upward with respect to the center of the vertical line 44. It consists of an image 49b.

  If the eye to be examined has an upper right oblique position when the vertical oblique examination is performed, the horizontal line 45 appears to be shifted upward with respect to the central portion of the vertical line 44 in the examined eye. On the other hand, when there is an upper left oblique position, the horizontal line 45 appears to be shifted downward with respect to the central portion of the vertical line 44. In the case of correcting the upper right oblique position, the well-known Base-Up prism and Bass-Down prism (not shown) are provided in the optometry windows 22 corresponding to the right eye and the left eye, respectively. Place in addition to. Further, when correcting the upper left oblique position, the Base-Down prism and the Bass-Up prism are added to the optometry windows 22 corresponding to the right eye and the left eye, respectively.

  Accordingly, when measuring the vertical oblique position, the examiner 26 visually recognizes the state image 42 shown in FIG. 6B displayed on the dial navigator unit 38, so that “the position of the horizontal line is the center of the vertical line. "Which side is up or down with respect to the part?" It is understood that the subject 12 should be asked, and if the horizontal line 45 appears to be shifted upward, the dial 30 may be turned to the left, When the horizontal line 45 appears to be shifted downward, it can be easily understood that the dial 30 should be turned to the right.

  In the example shown in FIGS. 6A and 6B, in order to clarify in which direction the vertical line 44 and the horizontal line 45 move when the dial 30 is rotated, FIG. As shown in a) and FIG. 7B, arrows 50 indicating the moving directions of the vertical line 44 and the horizontal line 45 can be displayed on the dial navigation unit 38, respectively.

  Moreover, when performing the test | inspection which measures the near-field spherical power of the eye to be examined using the subjective optometry apparatus 10 according to the present invention, as shown in FIG. 8, a plurality of vertical lines 51 and a plurality of horizontal lines 52 are orthogonal to each other. A target 11c is selected from the list display field 33 by the same operation as described above. As a result, the correction lens having the refractive power corresponding to the inspection data set in the visual target 11 c is arranged in each optometry window 22 under the control of the CPU 23 in the optometry window 22 of each phoropter 21 of the correction device 14. The In the examination of near-field spherical power using the visual target 11c, a cross cylinder lens (not shown) is used as the correction lens arranged in each optometry window 22. As is well known in the art, the cross cylinder lens is a lens formed by combining a convex cylindrical lens and a concave cylindrical lens so that their axes are orthogonal to each other. Further, when detecting that the target is selected from the list display field 33, the CPU 23 displays a state image 42 corresponding to the target 11c in the dial navigation unit 38 under the control of the image processing unit 29.

  In the example shown in FIG. 9, the state image 42 shows a shape that can be seen by the eye to be examined of the visual target 11 c, is displayed corresponding to the arrow 41 b displayed on the right side of the dial image 39, and has a plurality of vertical lines 51. The color of the plurality of vertical lines 51 is displayed in correspondence with the image 53a showing the visual target 11c displayed darker than the colors of the plurality of horizontal lines 52 and the arrow 41a displayed on the left side of the dial image 39. Is composed of an image 53b showing the visual target 11c displayed darker than the colors of the plurality of horizontal lines 52.

  For example, when the cross cylinder lens is disposed in each optometry window 22 so that the convex component axis of the cross cylinder lens is 180 ° and the concave component axis is 90 °, the horizontal refractive power and the vertical direction Due to the difference in refractive power, there is a difference between the focus of the horizontal component and the focus of the vertical component of the eye to be examined. In this case, since the refractive power of the vertical component is stronger than the refractive power of the horizontal component, each horizontal line 52 forms an image in front and each vertical line 51 forms an image in the rear. For this reason, the imaging position of each horizontal line 52 is close to the retina of the eye to be examined, and the color of each horizontal line 52 appears darker than the color of each vertical line 51. When each horizontal line 52 looks dark, a plus lens (not shown) is arranged in each optometry window 22 in addition to the cross cylinder lens. On the other hand, when each vertical line 51 looks dark, a minus lens (not shown) is arranged in each optometry window 22 in addition to the cross cylinder lens.

  Therefore, when executing the inspection for measuring the near spherical power, the examiner 26 visually recognizes the state image 42 shown in FIG. 9 displayed on the dial navigation unit 38, and “in the vertical line and the horizontal line, It turns out that the question "Which looks darker" should be made to the subject 12, and if each vertical line 51 looks dark, the dial 30 can be turned to the right, and each horizontal line 52 looks dark. In this case, it can be easily understood that the dial 30 should be turned to the left.

  For example, when the dial is turned to the right, when the CPU 23 detects that the dial has been turned to the right, the CPU 23 sends a control signal indicating that the minus lens is placed in the optometry window 22 of each phoropter 21 to the correction device 14. Send to the drive controller. Thereby, the minus lens is arranged in the optometry window 22 of each phoropter 21 of the correction device 14.

  FIG. 10 is a list showing the dial navigation unit 38 displayed on the display screen 32 for each type of examination when an examination other than the examination examples shown in FIGS. 5 to 9 is executed.

  For example, in R / G inspection for inspecting the spherical power of the eye to be inspected, a visual target in which a red region and a green region are provided on the left and right sides and a black circle is written in each region is used. Inspect whether it looks clear. In this case, the state image 42 displayed on the dial navigation unit 38 is displayed on the left side of the dial image 39 with the green “G” character and on the right side of the dial image 39, as shown in the column 54a of FIG. It is composed of the displayed red “R” character. That is, the state image 42 is composed of a color that can be clearly seen by the eye to be examined used for the R / G examination and characters indicating the color.

  Therefore, when performing the R / G inspection, the examiner 26 visually recognizes the display on the dial navigation unit 38, and thus, “Which of the black circle in the red area and the black circle in the green area looks clearer?” If it is clear that the subject 12 should be asked, and if the black circle in the red area is clearly visible, turn the dial 30 to the right to correct the visual function of the eye to be examined. When the black circle looks clear, it can be easily understood that the dial 30 should be turned counterclockwise.

  For example, as shown in the column 54b of FIG. 10, when the horizontal oblique inspection is performed using a cross ring chart in which a cross is written in a circle, the state image 42 displayed on the dial navigation unit 38 is a dial An image showing a cross ring chart displayed on the left side of the image 39 and the cross is shifted to the left with respect to the center of the circle, and a cross displayed on the right side of the dial image 39 and the cross is shifted to the right with respect to the center of the circle And an image showing a ring chart.

  Therefore, when performing the horizontal oblique inspection described above using the cross ring chart, the examiner 26 visually recognizes the display on the dial navigation unit 38, and thus, “the cross appears to be shifted to the left or right with respect to the center of the circle. "Do you want to ask the subject 12?" If the cross appears to be shifted to the left, the dial 30 can be turned to the left. If the cross appears to be shifted to the right It can be easily understood that the dial 30 should be turned to the right.

  Further, for example, as shown in the column 54c of FIG. 10, when performing the horizontal oblique inspection, instead of displaying the visible shape of the target 11 used for the inspection on the dial navigation unit 38, the eye to be examined is displayed. When the base-out prism is arranged in each optometry window 22 when the base-out prism is prone to be displayed, the characters “OUT” are displayed in the direction in which the dial 30 is to be turned, and the eye to be examined tends to be ectopic. In addition, the letters “IN” can be displayed in the direction in which the dial 30 should be rotated in order to place the Base-In prism in each optometry window 22. As a result, the examiner 26 may turn the dial 30 to the right when he / she determines that the eye to be examined has an internal oblique tendency by visually recognizing the dial navigation unit 38 during the horizontal oblique examination. When it is determined that there is a tendency to outlying, it can be easily understood that the dial 30 should be turned to the left.

According to the present embodiment, as described above, the state image 42 indicating the shape that can be seen by the eye of the target 11 used for the examination to be performed is displayed on the display unit 28 display screen 32 in the way the target is seen. Accordingly, the examiner 26 is displayed on the display screen 32 because the direction indication image 40 corresponding to the direction in which the dial 30 should be rotated to correct the visual function of the eye to be examined is displayed for each type of examination. By visually recognizing the displayed state image 42, how the optotype 11 used for the examination can be seen at each examination, and how the shape of each optotype 11 appears, is visible. It is possible to easily determine in which direction the dial 30 should be rotated to correct the direction.

  Thereby, since it is not necessary for the examiner 26 to memorize accurately for each type of examination the appearance of each target 11 and the rotation direction of the dial 30 corresponding to the appearance of each target 11, Even when the degree is low, the examiner 26 does not accurately store the view of each optotype 11 and the rotation direction of the dial 30 according to the view of each optotype 11. It is possible to reliably prevent erroneous measurement of the visual function of the optometry.

  Therefore, the visual function of the eye to be examined can be measured more accurately than in the conventional case where the dial 30 is rotated according to only the increase / decrease instruction image displayed on the display screen 32.

Further, as described above, the direction indicating image 40 is composed of a pair of arrows 41a and 41b arranged on the left and right of the dial image 39 and facing in opposite directions, and the state image 42 includes the arrows 41a and 41b. Each of the inspectors 26 displayed on the display screen 32 at the time of the inspection is shown corresponding to each of them and shows how the target 11 is corrected when the dial 30 is rotated in the direction of each arrow. When the dial 30 is rotated in any direction by comparing the arrows 41a and 41b with the state image 42, the state images 42 are shown corresponding to the arrows 41a and 41b. It can be determined more easily whether the eye to be examined in which the visual target 11 is visible can be corrected.

  Furthermore, as described above, since the state image 42 is displayed on the display screen 32 for each type of examination, even when different types of targets 11 are used for each of a plurality of examinations, the state image 42 is displayed for each of a plurality of examinations. Since the state image 42 corresponding to the target 11 used for each examination is displayed on the display screen 32, the examiner can determine the appearance of each target 11 and the rotation direction of the dial 30 according to the appearance of each target 11. 26 need not be stored accurately for each type of examination. Thereby, even when different types of visual targets 11 are used for each of a plurality of examinations, erroneous operation of the dial 30 and erroneous measurement of the visual function of the eye to be examined can be more reliably prevented.

  Further, as described above, since the state image 42 shows a shape that can be seen by the eye to be examined of the visual target 11, the examiner 26 can more easily visually recognize the state image 42 during the examination.

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 display screen of the display part which concerns on this invention. It is explanatory drawing which shows schematically the cross chart which concerns on this invention. (A) is explanatory drawing which shows roughly the dial navi part displayed on a display screen when test | inspecting a horizontal oblique position, (b) is displayed on a display screen when test | inspecting a vertical oblique position. FIG. (A) is explanatory drawing which shows roughly the example of the dial navigation part different from the example shown to Fig.6 (a), (b) is a dial different from the example shown in FIG.6 (b). It is explanatory drawing which shows the example of a navigation part roughly. It is explanatory drawing which shows roughly the optotype used when measuring near spherical power. It is explanatory drawing which shows roughly the dial navigation part displayed on a display screen when measuring near-field spherical power. 10 is a table schematically showing a dial navigation unit displayed on a display screen when an inspection other than the inspection examples shown in FIGS. 6 to 9 is executed.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Subjective optometry apparatus 13 Target presentation apparatus 14 Optical element arrangement apparatus (correction apparatus)
28 Display means (display unit)
30 Dial 39 Dial image 40 Direction indication image 42 Status image

Claims (4)

An optotype presenting apparatus for presenting various visual targets used for various examinations of the visual function of the eye to be examined to the eye to be examined;
An optical element placement device that holds various optical elements for correcting the visual function of the eye to be examined, and selectively places each optical element between the eye to be examined and the optotype presenting device;
A dial that is rotated to select and operate the optical element of a type corresponding to a response from a subject who has seen the target through each optical element;
A dial image corresponding to the dial , a counterclockwise arrow indicating a counterclockwise rotation direction of the dial disposed on the left side of the dial image , and a clockwise rotation of the dial disposed on the right side of the dial image display means for direction indication image is displayed with the arrow in the clockwise direction indicated by the direction of rotation,
In a subjective optometry apparatus comprising: an arithmetic control circuit that causes the display means to display and control the dial image and the arrow.
The arithmetic control circuit generates a first state image indicating a state in which the appearance of the target by the eye to be examined is the same as the appearance that the dial needs to be rotated to the left in order to correct the visual function. It is located on the left side of the counterclockwise arrow and displayed on the display means, and the appearance of the visual target by the eye to be examined needs to be rotated to the right to correct the visual function. A subjective optometry apparatus , wherein a second state image showing the same appearance state as the direction is positioned on the right side of the clockwise arrow and displayed on the display means . Each of the first and second state images includes a plurality of lines, and an arrow indicating a moving direction of the lines in a direction in which the appearance of the first state image changes when the dial is rotated counterclockwise. Is displayed in the first state image, and an arrow indicating the moving direction of the line in a direction in which the appearance of the second state image changes when the dial is rotated to the right is the second state image. The subjective optometry apparatus according to claim 1, wherein the subjective optometry apparatus is displayed in the state image .   The subjective optometry apparatus according to claim 1, wherein the state image is displayed on the display unit for each type of examination.   The subjective state optometry apparatus according to any one of claims 1 to 3, wherein the state image shows a shape of the target that can be seen by the eye to be examined.