Ophthalmologic examination device

Abstract

To provide an ophthalmologic examination device capable of performing a plurality of ophthalmologic examinations.SOLUTION: An ophthalmologic examination device 1 includes a hand-held body 2. The body 2 includes a plurality of examination windows 22, 38 that enable ophthalmologic examinations. The plurality of examination windows 22, 38 include a pair of window parts 20, 21, 30, 37 that each have an interpupillary distance.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to an ophthalmic examination instrument. [Background technology]

[0002] Conventionally, ophthalmic examination instruments with handheld bodies have been known, such as a cyclodextral deviation measuring instrument (Patent Document 1) that determines the presence and degree of cyclostrabismus, a linear glass tester that checks the presence and type of strabismus and diplopia, an interpupillary distance measuring instrument that measures the interpupillary distance, and an eye shield that has a function of hiding one eye during a cover test, etc. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Republished Publication No. 2015 / 163444 Summary of the Invention [Problem to be solved by the invention]

[0004] However, conventional handheld devices only possess one of the above functions, and when performing multiple ophthalmic function tests, it was necessary to prepare multiple types of devices and switch between them to perform the tests, which was an issue. SUMMARY OF THE PRESENT EMBODIMENT An object of the present invention is to provide an ophthalmic testing device capable of solving the above problems and performing a plurality of ophthalmic function tests. [Means for solving the problem]

[0005] The present invention comprises a handheld main body having a plurality of test windows enabling ophthalmic function testing, each of the plurality of test windows comprising a pair of window portions arranged with an interpupillary distance. Effect of the Invention

[0006] According to the present invention, multiple ophthalmic functional tests can be performed. [Brief description of the drawings]

[0007] [Figure 1] FIG. 2 is a plan view of the ophthalmic examination instrument. [Diagram 2] FIG. 2 is an exploded perspective view of the ophthalmic examination instrument. [Diagram 3] FIG. [Figure 4] 1 shows an embodiment in which a Bagorini stripe lens inspection is performed using an ophthalmic inspection device. [Diagram 5] 1 shows an embodiment in which rotational deviation measurement is performed using an ophthalmic examination device. [Figure 6] 1 illustrates an embodiment in which interpupillary distance is measured using an ophthalmic tester. [Figure 7] 1 shows an embodiment in which a visual acuity test is performed using an ophthalmic tester. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] (Embodiment 1) [Ophthalmic examination equipment configuration] Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. Fig. 1 is a plan view of the ophthalmic examination instrument 1, and Fig. 2 is an exploded perspective view of the ophthalmic examination instrument 1. Fig. 3 is a perspective view of the rear surface of the front case 3.

[0009] The ophthalmic examination instrument 1 includes a handheld body 2 made of resin, which includes a front case 3 and a rear case 4 as shown in Fig. 2. The front case 3 includes an elliptical first opening 8, a rectangular second opening 9, and a circular third opening 10. The rear case 4 includes an elliptical first opening 8A, a rectangular second opening 9A, and a circular third opening 10A in the same form as the front case 3. Between the front case 3 and the rear case 4, an occluder lens 11, a first optical element 12, and a second optical element 13 are sandwiched, which are used in ophthalmology for various functional tests described later.

[0010] 3, a step portion 14 is formed on the back surface of the front case 3. An eye shielding lens 11 is disposed on step portion 14A formed around the first opening 8, a first optical element 12 is disposed on step portion 14B formed around the second opening 9, and a second optical element 13 is disposed on step portion 14C formed around the third opening 10. After the eye shield lens 11, the first optical element 12, and the second optical element 13 are arranged, the rear case 4 is fitted onto the step portion 14, and the rear case 4 is fixed to the front case 3 with a pin (not shown) or bonded with an adhesive.

[0011] 2, the first optical element 12 has a first Bagoline lens 20 and a second Bagoline lens 21, and a third Bagoline lens 37 is provided between the first Bagoline lens 20 and the second Bagoline lens 21. The first Bagoline lens 20, the second Bagoline lens 21, and the third Bagoline lens 37 each have a width of approximately 30 mm in the longitudinal direction, and the second opening 9 has a width of approximately 90 mm.

[0012] The Bagoline lens is a lens used in the Bagoline linear lens test to diagnose abnormalities in retinal correspondence. It is a lens with lines at a specific angle on a transparent or colored glass. Light passing through the Bagoline lens is observed as a line of light extending perpendicular to the angle of the lines. The first Bagoline lens 20 is a 45-degree Bagoline lens in which the filaments are inclined at 45 degrees when the positive direction is clockwise around the short side direction of the main body 2. The second Bagoline lens 21 is a 135-degree Bagoline lens in which the filaments are inclined at 135 degrees when the positive direction is clockwise around the short side direction of the main body 2. In this embodiment, the first Bagoline lens (window portion) 20 and the second Bagoline lens (window portion) 21 correspond to the first inspection window 22. The first Bagoline lens 20 and the second Bagoline lens 21 are formed so that the distance between their centers is approximately 60 mm (pupillary distance). The first Bagoline lens 20 and the second Bagoline lens 21 are formed of colorless transparent glass. The third Bagoline lens 37 may be colored, and is colored red in this embodiment.

[0013] The third Bagoline lens 37 is a 0-degree Bagoline lens whose lines are not inclined with respect to the short-side direction of the main body 2. The third Bagoline lens (window portion) 37 and a Maddox rod (window portion) 30 of the second optical element 13 described below correspond to a second inspection window 38. The distance between the center of the Maddox rod 30 and the center of the third Bagoline lens 37 is formed to be approximately 60 mm (pupillary distance).

[0014] The second optical element 13 includes a Maddox rod 30 and an operating part 31 integral with the Maddox rod 30. The Maddox rod 30 has a structure in which a plurality of cylindrical lenses are arranged in parallel with no gaps and joined together, and the joined cylindrical lenses are cut into a circle in a direction perpendicular to the axis of the cylindrical lenses. The Maddox rod 30 may be colored, and is colored green in this embodiment. The center of the circle of the Maddox rod 30 coincides with the center of the circle of the third opening 10.

[0015] The operating unit 31 is disposed on a sectorial step 33 (see FIG. 3) on the back surface of the front case 3. The operating unit 31 is freely swingable within the range of the sectorial step 33, and when the operating unit 31 is swung, the Maddox rod 30 is freely rotatable.

[0016] As shown in FIG. 1, an end of the operation portion 31 protrudes from the end of the main body 2, and a marker 32 is formed on this protruding end. The front case 3 has an angle scale 35, which is printed on the surface between the third opening 10 and the round portion 34. When the examiner operates the operating unit 31, the Maddox rod 30 rotates, the marker 32 points to the angle scale 35, and the examiner can read the angle scale 35 and confirm the rotation angle of the Maddox rod 30 (the axial direction of the cylindrical lens).

[0017] The Maddox rod 30 is arranged so that when the marker 32 corresponds to "0" on the angle scale 35, the angle of the Maddox rod 30 is parallel to the short side direction of the main body 2. When the marker 32 corresponds to "0" on the angle scale 35, the axial direction of the cylindrical lenses that make up the Maddox rod 30 coincides with the short side direction of the main body 2.

[0018] The front case 3 has a left-right guide portion 36 between the third opening 10 and the angle scale 35, and the left-right guide portion 36 is printed on the surface between the third opening 10 and the angle scale 35. On the left-right guide portion 36, "RF (Right fixation (fixation with the right eye))" and "LF (left fixation (fixation with the left eye))" are printed upside down, with "In" printed above and "Ex" printed below the left and right "RF", and "In" printed above and "Ex" printed below the "LF".

[0019] The front case 3 has first scale graduations 5 on one side 3A extending in the longitudinal direction. The first scale graduations 5 are printed on side 3A. The front case 3 has a nose pad 7 on the other side 3B extending in the longitudinal direction. A mark 7A indicating the center of the nose pad 7 is printed in the center of the nose pad 7. The front case 3 has a pair of second scale graduations 6, distributed on both sides in the longitudinal direction of the main body 2, based on the mark (center) 7A of the nose pad 7. The pair of second scale graduations 6 are printed 40 mm apart.

[0020] [Retinal compatibility testing application] 4 shows an embodiment in which a Bagorini stripe lens test (ophthalmic function test), which is an example of a retina correspondence test, is performed using the ophthalmic tester 1. In this case, the first test window 22 of the ophthalmic tester 1 is placed against the eye of the subject to perform the test.

[0021] The first test window 22 includes a first Bagoline lens (window portion) 20 and a second Bagoline lens (window portion) 21. The first Bagoline lens 20 corresponds to a window portion passing through the line of sight G of the subject's right eye, and the second Bagoline lens 21 corresponds to a window portion passing through the line of sight G of the subject's left eye, and this pair of window portions constitutes the first test window 22. The pair of window portions are each disposed with an interpupillary distance of approximately 60 mm.

[0022] In the Bagoline fringe lens test, an examiner places an ophthalmic tester 1 between a test light source LI1 and both eyes Ey of a subject, and the subject observes the light source LI1 through a first test window 22. The subject perceives two linear lights Lb1 and Lb2 corresponding to the first Bagoline lens 20 and the second Bagoline lens 21, respectively. Depending on how the linear light Lb1 perceived through the first Bagoline lens 20 and the linear light Lb2 perceived through the second Bagoline lens 21 appear, the examiner diagnoses an abnormality in the subject's retinal correspondence.

[0023] The first Bagorigny lens 20 and the second Bagorigny lens 21 are disposed on either side of the third Bagorigny lens 37, as shown in FIGS. The third Bagoline lens 37 is positioned at a position from 45 mm to 75 mm of the first scale graduation 5, the first Bagoline lens 20 is positioned at a position from 15 mm to 45 mm of the first scale graduation 5, and the second Bagoline lens 21 is positioned at a position from 75 mm to 105 mm of the first scale graduation 5. The interpupillary distance of a subject is generally about 60 mm on average, with a range of 45 to 70 mm. According to this embodiment, first test window 22 can be adapted to subjects with various interpupillary distances.

[0024] [For measuring rotational deviation] FIG. 5 shows a mode for performing rotational deviation measurement (ophthalmic function test). In this case, the second test window 38 of the ophthalmic test instrument 1 can be placed against the subject's eye to quantify the degree of the subject's cycloduction deviation. The second inspection window 38 includes a third Bagoline lens (window portion) 37 and a Maddox rod (window portion) 30. The third Bagoline lens 37 is, for example, red, and the Maddox rod 30 is, for example, green. The third Bagoline lens 37 and the Maddox rod 30 correspond to the window portion through which the line of sight G passes, and this pair of window portions constitute the second inspection window 38. The pair of window portions are arranged to have an interpupillary distance of approximately 60 mm.

[0025] In the measurement of rotational deviation, the examiner places the ophthalmic examination instrument 1 between the measurement light source LI2 and both eyes Ey of the subject, and the subject observes the light source LI2 through the second examination window 38. In the measurement of rotational deviation, for example, one of the subject's eyes is designated as the fixation eye, and the third Bagorini lens 37, which is red, is held in front of the subject's eye so that it is in front of the fixation eye. In this state, when the subject observes the light source LI2 through the second test window 38, he or she perceives two linear lights Lc1 and Lc2 according to the respective angles of the Maddox rod 30 and the third Bagorine lens 37. If the subject has a normal eye, the linear light Lc1 perceived through the Maddox rod 30 and the linear light Lc2 perceived through the third Bagorine lens 37 are observed to be parallel to each other, although not shown in the figure. In this embodiment, the Maddox rod 30 is molded by incorporating upper and lower prisms so that the vertical deviation of the two linear lights Lc1 and Lc2 becomes significant.

[0026] 5, if the linear light Lc1 and the linear light Lc2 are not parallel, it can be determined that the subject's eye has a rotational deviation. In this case, the examiner rotates the green Maddox rod 30 on the non-fixing eye side until the linear light Lc1 and the linear light Lc2 become parallel. When the examiner operates the operation unit 31 to rotate the Maddox rod 30, the linear light beams Lc1 and Lc2 observed by the subject become parallel (not shown), and the examiner can quantify the angle of the angle scale 35 at that time as the rotational deviation. Since the two linear light beams are observed in different colors, red and green, it is easy for the subject to distinguish between the linear light beams Lc1 and Lc2 during the measurement of the rotational deviation.

[0027] As a modified example, when there is no vertical deviation between the two linear lights Lc1 and Lc2 and they overlap, a Fresnel film prism (not shown) may be attached to the Maddox rod 30 on the non-fixing eye side so that the vertical deviation becomes noticeable. When the interval between the linear lights Lc1 and Lc2 becomes large due to vertical strabismus, another Fresnel film prism may be attached to move the linear light Lc1 in a direction that reduces the vertical deviation so that the examination becomes easier. In this case, the main body 2 may be provided with an attachment means for attaching the Fresnel film prism. As an example of the attachment means, a groove (not shown) into which the Fresnel film prism is fitted may be formed in the main body 2, and the Fresnel film prism may be attached to and detached from the main body 2 by a magnet (not shown).

[0028] 5 shows the Maddox rod 30 placed against the right eye of a subject. When placing the Maddox rod 30 against the left eye of a subject for an examination, the main body 2 is rotated left and right to perform the examination, although this is not shown in the figure. 1 and 2, "LF" and "RF" are printed upside down on the left and right guide parts 36, making it easy for the examiner to distinguish the top and bottom of the main body 2 and the rotation direction of the operation part 31. Furthermore, "In" and "Ex" are printed above and below "LF", respectively, making it easy for the examiner to distinguish whether it is inward rotation or outward rotation.

[0029] When the Maddox rod 30 is rotated toward the "In" side and the two linear lights Lc1 and Lc2 observed by the subject become parallel, this indicates that the non-fixed eye of the subject is inwardly rotated, and the rotational deviation can be quantified based on the value of the angle scale 35 corresponding to the rotational position of the Maddox rod 30 at that time. The same applies to "In" and "Ex" printed on the "RF" side. "LF" printed on the left and right guide parts 36 corresponds to the left eye being the fixating eye, "RF" corresponds to the right eye being the fixating eye, "In" corresponds to the inwardly rotated side, and "Ex" corresponds to the outwardly rotated side.

[0030] [Other uses] FIG. 6 shows an embodiment for performing interpupillary distance measurement (ophthalmic function test). 6, the interpupillary distance W of the subject can be measured using the nose pad 7 and the second scale 6. The ophthalmic examination instrument 1 is placed horizontally and the mark 7A of the nose pad 7 is placed at the center of the subject's nose to perform the measurement.

[0031] FIG. 7 shows an embodiment for performing a visual acuity test or a cover test (ophthalmic function test). The occluder lens 11 is made of, for example, semi-transparent glass so as to block one eye Ey of the subject. The occluder lens 11 may be an opaque resin cover. With this configuration, the ophthalmic examination instrument 1 can be used as an occluder, as shown in Fig. 7. In this case, the occluder lens 11 of the ophthalmic examination instrument 1 is placed against the subject's eye for the examination.

[0032] As described above, in this embodiment, the first inspection window 22 enables Bagorini linear lens testing, which is an example of an ophthalmic function test, the second inspection window 38 enables rotational deviation measurement, which is an example of an ophthalmic function test, the nose pad 7 and second scale 6 enable pupillary distance measurement, the occluder lens 11 enables visual acuity testing, and the first scale 5 enables length measurement. With this configuration, multiple ophthalmic functional tests can be performed.

[0033] As described above, the ophthalmic examination instrument 1 of this embodiment comprises a handheld main body 2, which has a first examination window 22 and a second examination window 38 (multiple examination windows) that enable ophthalmic function examination, the first examination window 22 has a first Bagoline lens 20 and a second Bagoline lens 21 (a pair of window portions), the second examination window 38 has a Maddox rod 30 and a third Bagoline lens 37 (a pair of window portions), and the first Bagoline lens 20 and the second Bagoline lens 21, and the Maddox rod 30 and the third Bagoline lens 37 are each arranged with an interpupillary distance. With this configuration, multiple ophthalmic functional tests can be performed.

[0034] In addition, the ophthalmic examination instrument 1 of this embodiment is equipped with a first examination window 22 for examining retinal correspondence (first function) and a second examination window 38 for examining rotational deviation (second function), and a third Bagoline lens 37 (one window portion) of the second examination window 38 is arranged between the pair of first Bagoline lens 20 and second Bagoline lens 21 of the first examination window 22, and a Maddox rod 30 (the other window portion) of the second examination window 38 is arranged outside the pair of first Bagoline lens 20 and second Bagoline lens 21 of the first examination window 22. According to this configuration, the pair of windows can be arranged compactly, and the longitudinal size of the main body 2 of the ophthalmic examination instrument 1 can be reduced. In addition, after the retinal correspondence is examined, the cycloduction deviation can be examined simply by sliding the main body 2 laterally.

[0035] In this embodiment, there is a first inspection window 22 for inspecting the first function and a second inspection window 38 for inspecting the second function, but the additional functions of each inspection window 22, 38 are not limited to the first and second functions. For example, referring to Fig. 1, a mirror lens (+2D convex lens) may be fitted in the circular third opening 10 instead of the Maddox rod 30, and a red-colored lens may be fitted in place of the first Bagorini lens 20. In this case, the +2D convex lens alone can be used for optometry, and the red-colored lens alone can be used as a red filter. Moreover, instead of the first Bagorini lens 20 and the second Bagorini lens 21, a magnifying glass (convex lens) may be fitted.

[0036] In this embodiment, three lenses, the first Bagorini lens 20, the second Bagorini lens 21, and the third Bagorini lens 37, are arranged in the rectangular second opening 9A of the main body 2, but the present invention is not limited to this. For example, it is possible to make the width of the rectangular second opening 9A longer and further arrange multiple lenses side by side. When increasing the number of lenses, it is possible to add an inspection function different from the function of the first inspection window 22 and the inspection function of the second inspection window 38 to the increased lenses.

[0037] In addition, in the ophthalmic inspection instrument 1 of this embodiment, the first Bagoline lens 20 and the second Bagoline lens 21 in the first inspection window 22 and the Maddox rod 30 and the third Bagoline lens 37 in the second inspection window 38 are arranged in a line. According to this configuration, the pair of windows arranged with the interpupillary distance therebetween can be arranged compactly, and the ophthalmic examination instrument 1 can be made compact. In this embodiment, the first Bagorine lens 20, the second Bagorine lens 21, the Maddox rod 30, and the third Bagorine lens 37 are arranged in a row, but this is not limited to this. The row of windows can be arranged in two or more rows, i.e., in multiple rows. When the number of rows of windows is increased, it becomes possible to add a function different from the function of the first inspection window 22 and the function of the second inspection window 38 to the added inspection window (another window).

[0038] In addition, in the ophthalmic inspection instrument 1 of this embodiment, the first Bagoline lens 20 and the second Bagoline lens 21 in the first inspection window 22 and the third Bagoline lens 37 in the second inspection window 38 are arranged continuously with no gap between them. In this embodiment, it is possible to leave a gap between each of the lenses 20, 21, 37, but by arranging them continuously without any gaps between them, a pair of window portions can be arranged compactly, and the ophthalmic examination instrument 1 can be made smaller.

[0039] In addition, the ophthalmic examination instrument 1 of this embodiment is provided with a nose pad portion 7 on the side of the main body 2, and is provided with a pair of second scale graduations 6 (gradations) that are arranged to the left and right based on the mark 7A on the nose pad portion 7 and measure the interpupillary distance. According to this configuration, the ophthalmic examination instrument 1 can be used for interpupillary distance measurement in addition to retinal correspondence testing and cycloduction measurement.

[0040] The ophthalmic examination instrument 1 of this embodiment also includes an eye shielding lens 11 on an edge of the main body 2 . According to this configuration, in addition to the retinal correspondence test, cycloduction measurement, and interpupillary distance measurement, the ophthalmic examination instrument 1 can also be used for visual acuity tests, cover tests, and the like. [Explanation of symbols]

[0041] 1 Ophthalmic examination equipment 2 Main unit 5 First scale 6 Second scale divisions (divisions) 7 Nose pad 7A Landmark (center) 11 Eye shield lenses 12 1st optical element 13 Second optical element 20 First Bagoriny lens (window) 21 2nd Bagoriny lens (window) 22 First inspection window 30 Maddox Rod (window) 37 3rd Bagoriny lens (window) 38 Second inspection window G line of sight W pupillary distance Eye

Claims

1. Equipped with a handheld body, the main body includes a plurality of test windows that enable ophthalmic function tests; The plurality of test windows each include a pair of window portions disposed at an interpupillary distance. Ophthalmic examination equipment.

2. the inspection window includes a first inspection window for inspecting a first function and a second inspection window for inspecting a second function different from the first function, one window portion of the second inspection window is disposed between a pair of window portions of the first inspection window, and the other window portion of the second inspection window is disposed outside the pair of window portions of the first inspection window.

2. An ophthalmic examination instrument as claimed in claim 1.

3. The window portion of the first inspection window and the window portion of the second inspection window are arranged in a row.

3. An ophthalmic examination instrument as claimed in claim 2.

4. At least one window portion of the first inspection window and at least one window portion of the second inspection window are continuously arranged without any space between each other.

4. An ophthalmic examination instrument as claimed in claim 3.

5. Another window portion enabling an ophthalmic function test different from the first test window and the second test window is arranged in a plurality of rows.

3. An ophthalmic examination instrument as claimed in claim 2.

6. A nose pad is provided on the side of the main body, and a scale for measuring the interpupillary distance is provided on the left and right sides based on the center of the nose pad.

3. An ophthalmic examination instrument according to claim 1 or 2.

7. A shield is provided on an end of the main body.

3. An ophthalmic examination instrument according to claim 1 or 2.

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