JP2009112400A - Optometry frame - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily and accurately inspect phoria by an optometry frame W. <P>SOLUTION: The optometry frame W is for mounting some test lenses 13 for an inspection on a pair of test lens frames 11a and 11b and confirming the degree of visual acuity correction by the test lenses. Polarization filters 20, 20a and 20b are attached to a lens holder 11 so as to respectively cover the front surface of the test lens frames, and the polarization filters can be freely removed from the test lens frame front surface. The polarization filter 20 is removed as indicated in the figure in a normal visual acuity correction inspection, and the polarization filter 20 is made to face the front surface of the test lens frame in a deflection cross test. In such a manner, when it is attached to the optometry frame, since a distance between the polarization filter and the optometry frame W (face) or the like is fixed during the inspection using the polarization filter, the accurate inspection can be performed. The polarization filter 20 is rotatable by an axial rotation structure or the like. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an optometry frame that can measure an oblique position and the like using a polarization filter when a lens power is measured with the optometry frame attached.

When making eyeglasses, it is necessary to measure the optimal lens power, and usually, as shown in FIG. 7, it is performed by wearing an optometry frame W or by a visual acuity test apparatus (see Patent Document 1).
The latter visual acuity test apparatus is scientific and can be measured accurately, but it is uniform and it is difficult to make eyeglasses that are appropriate and satisfactory for each individual.
For this reason, even today, when the visual acuity inspection apparatus is widespread, the inspection using the former optometry frame W is still mainstream.
Japanese Patent Laid-Open No. 5-15491

  As shown in FIG. 7, the optometry frame W includes a lens holder 11 having a pair of test lens frames 11 a and 11 b on the left and right, and temples 12 and 12 attached to the left and right of the lens holder 11. Several inspection test lenses 13 are mounted on the frames 11a and 11b, the degree of vision correction by the test lenses 13 is confirmed, and the optimum lens power is measured (inspected).

By the way, a person's eyes are not limited to hyperopia and myopia, and if a lens having a power for correcting hyperopia or myopia is attached to the glasses, the person cannot live without getting tired.
That is, for example, there is a person who has a habit called “an oblique position”, and this person can live a life without eye fatigue by correcting the oblique position. In today's eye-busy environment, eye fatigue has become violent, and there is an urgent need to resolve it.

As shown in FIG. 8, the oblique position means that one eye (melting point) a can be seen by both eyes E ₁ and E ₂ when _one eye a is tried, but one eye ( When the right eye E ₁ or the left eye E ₂ ) is made invisible, such as by blocking the eye, the eye E “want to open”, “want to lift”, “want to lift”, “lowered” as indicated by the arrows in FIG. It says a state showing a tendency to say " This oblique position includes “outer oblique position” (FIG. 9A), “inner oblique position” (FIG. 9B), left upper oblique position (FIG. 9C), left There are a subclinical position of the lower eye (FIG. (D)), an outer oblique position of the left eye + an upper oblique position of the left eye (FIG. (E)), a lower right eye position (FIG. (F)), and the like.

As shown in FIG. 10, a person with this oblique eye E moves the line of sight of the eye E (for example, the line of sight (chain line) of the right eye E ₁ as shown by a solid line) when viewing one point a. It can be adjusted to the point (melting point) a, but if it is shielded as described above, the line of sight is shifted. In other words, when looking at a point a, the line of sight is unconsciously adjusted, but the eye is tired when looking at the point for a long time, such as reading a book, because of the movement of aligning the line of sight. It will be.
This oblique position is one of the eyelids, for example, there are people who can straighten their legs but who are more comfortable with the crab crotch and those who are easier with the inner crotch. For this reason, as a large crab person gets tired if he keeps his leg straight, a person who also has a large “oblique position”, which is the eyelid, tends to get tired.
As shown in FIG. 10, if a prism (lens) L can be used to look at a point a with both eyes E ₁ and E ₂ even in an oblique state (the prism L can change the line of sight to a chain line). If you correct it to a solid line), you will lose fatigue.

As a method of measuring the oblique position, there is a “deflection cross test”, and a visual table in which, for example, a vertical line is visible on the right eye and a horizontal line is visible on the left eye through a deflection filter called “deflection cross chart”.
According to this, because of the different visual charts of the vertical and horizontal lines, the images of the left and right eyes E ₁ and E ₂ are fused (the same point a viewed by the left and right eyes E ₁ and E ₂ is viewed as one point. Can't do)
For this reason, in the case of the normal position (when both eyes E ₁ and E ₂ are not oblique), as shown in FIG. 11a, it looks like a cross, but in the case of the oblique position, in FIGS. 11b, c, and d. Looks like it shows. FIG. 11b shows a case where the line is displaced in the horizontal direction (in the case where the position is oblique in the horizontal direction). FIG. 11b shows that the line of sight of the left eye E2 is shifted to the left, and FIG. are shifted to the right, as shown in FIG. 10, if correct heterophoria of the left eye E ₂ by the prism (lens) L, as shown in (c), self gaze of the left eye E ₂ Can be seen in the cross without correction (while still in oblique position). FIG. 11c shows a case of deviation in the vertical direction (in the case of the oblique position in the vertical direction), and FIG. 11d shows a case of deviation in the oblique direction (in the case of the oblique position in the oblique direction). if correct heterophoria of the left eye _{E 2} or both eyes _E 1, _{E 2} by L, as shown in each (c), corrected by self-gaze of the left eye _{E 2} or both eyes _E 1, _{E 2} You can see it in the cross without doing it.

Although a technique for electronically performing this oblique inspection has been developed (see Patent Document 2), this inspection method is scientific and accurate as in the above-described visual inspection, but is uniform. It is difficult to make an appropriate and satisfactory measurement for each individual. Also, the inspection apparatus is expensive.
For this reason, even today, when the visual acuity test apparatus is widespread, the test using the former optometry frame W is performed in parallel.
Republished 2003-041572

The oblique examination by the conventional optometry frame W uses a jig 15 having polarizing filters F ₁ and F ₂ in the left and right directions as shown in FIG. 12, and the jig 15 is placed in front of the optometry frame W. The deflection cross test is carried out through the polarizing filters F ₁ and F ₂ .

The conventional oblique inspection using the jig 15 is carried out by the subject, and the distance from the optometry frame W (face) is not constant at the time of the inspection, and the accuracy is lacking.
In view of such circumstances, an object of the present invention is to enable smooth and accurate inspection using a polarizing filter such as the oblique position.

In order to solve the above-mentioned problem, the present invention pays attention to the fact that, when a person wearing spectacles uses sunglasses as a sunglass, the sunglass is supplementarily attached to the glasses (see Patent Document 3). As with the auxiliary sunglasses, it was attached to the optometric frame so that it could be removed when not in use.
As described above, when the optical filter is attached to the optometry frame, the distance between the polarization filter and the optometry frame W (face) is constant during the inspection using the polarization filter, and thus an accurate inspection can be performed. .
JP 2002-244086 A

  As a configuration of the present invention, it consists of a lens holder having a pair of test lens frames on the left and right, and temples attached to the left and right of the lens holder, and a number of test lenses for inspection are mounted on the test lens frame, In an optometry frame for confirming the degree of vision correction by the test lens, the polarizing filter is attached to the lens holder so as to cover the front surfaces of the pair of test lens frames, and the polarizing filter is attached to the front surface of the test lens frame. It is possible to adopt a configuration that allows the user to leave the room.

  The polarizing filter is not limited to the above-mentioned polarization cross inspection, but for example, for polarizing red-green inspection, for polarization balance inspection, for polarization cross inspection, for U-shaped inspection, for Worth 4 lamp inspection, for clocks (rotating slant) Any one of inspection, polarization stereo inspection, fusion width measurement inspection, cross ring inspection, and the like can be employed.

The "polarized red-green test" uses a target that shows the upper and middle targets on the right eye and the lower and middle targets on the left eye when a polarizing filter is applied, and determines the strength of the correction power for each eye. Used for
In the "polarization balance test", when a polarizing filter is applied, only the upper Landolt ring is visible with the right eye, only the lower Landolt ring is visible with the left eye, and the line between them uses a visual target that is visible with both eyes. It is used for inspection and for adjusting balance, and it is also used for inspection of astigmatism using a cross cylinder.
“U-shaped inspection” is a unequal image inspection with a polarizing filter, using a right eye with a right eye, a left eye with a left eye, and a left circle with a visual target visible with both eyes. It is used for inspection (one with a difference in the size of images on the left and right retinas), or for oblique inspection.
“Worse 4 lamp inspection” is for inspection of peripheral fusion, and it is used with red filter for the right eye and green filter for the left eye to check whether there is suppression (monocular vision), double vision (thing looks double). Can be inspected.

In the configuration of the invention described above, the pair of polarizing filters can be made separate from the front surfaces of the pair of test lens frames, with the pair of polarizing filters being separate.
If the pair of polarizing filters is a single unit, when the pair of polarizing filters are moved away from the front of the test lens frame, the paired polarizing filters are moved away, which is bulky and uncomfortable, and the side that has left. In addition, the load on the polarizing filter is biased, and the optometry frame is uncomfortable. However, if the pair of polarizing filters are separate, the pair of polarizing filters can be retracted separately, and the retracting direction can be symmetrical with respect to the optometry frame, such as left and right. There is no sense of incongruity.

  In addition, if the pair of polarizing filters can be freely replaced with other polarizing filters for inspection, it is possible to perform inspections using various polarizing filters with a single optometry frame attached, which is bothersome. There is no.

As a means for attaching the polarizing filter to the lens holder, it is conceivable to use a screw fixing, a clothespin-like clamping, etc., for example, a hole is formed in the lens holder, and a supporting shaft of the polarizing filter is inserted into the hole. The polarizing filter can be moved away from the front surface of the test lens frame by rotating around the support shaft.
At this time, if the supporting shaft can be inserted into and extracted from the hole, the polarizing filter can be freely replaced with another polarizing filter for inspection.

  Various configurations are conceivable for the configuration of the polarizing filter.For example, a filter body that covers the front surface of the test lens frame, a side frame that supports the filter body at its side edge, and a lateral frame from the side frame. It can be set as the structure which consists of the horizontal shaft extended in a direction, and the said support shaft provided in the horizontal rail.

  At this time, if the filter main body is screwed to the side frame and can be freely replaced, the polarizing filter can be replaced by releasing the screwing. That is, it is effective when the polarizing filter is replaced due to breakage or the like.

  In addition, a pair of protrusions projecting forward and backward in the retraction direction of the polarizing filter is provided on the reed, and the polarizing filter covers the front surface of the test lens frame and is positioned at a predetermined position (an optometry position such as an oblique position). In this case, the polarizing filter can be easily set at a predetermined position if both the protrusions abut against the side surface of the test lens frame and the polarizing filter is positioned on the test lens frame. At this time, the protrusion on the front side of the retracted direction of the protrusion moves over the corner portion of the lens holder, and its position is fixed when the tip is brought into contact with the side surface of the test lens frame with its elasticity. Can be.

  As described above, since the polarizing filter is attached to the optometry frame as described above and can be withdrawn when not in use, there is no hindrance to the power inspection by exchanging the lens using the optometry frame. Further, when an inspection using a polarizing filter is performed, the distance between the polarizing filter and the optometry frame (face) is constant, so that an accurate inspection can be performed.

  1 to 5 show an embodiment, and this embodiment is obtained by attaching polarizing filters 20a and 20b (general symbol “20”) to the conventional optometry frame W shown in FIG. The code | symbol shows the same thing.

The polarizing filter 20 is for the “deflection cross test”, and a vertical line can be seen through the right-eye polarizing filter 20a, and only a horizontal line can be seen through the left-eye polarizing filter 20b. The polarizing filter 20 is provided at a filter main body 21, a side frame 22 that supports the filter main body 21 at the side edge thereof, an arc-shaped reed 23 extending laterally from the side frame 22, and an end of the reed 23. It consists of a support shaft 24 in the vertical direction. The side frame 22, the horizontal bar 23, and the support shaft 24 are integrally molded products made of resin.
The side frame 22 is curved so as to be along the side edge of the filter body 21, the side edge of the filter body 21 is applied to the curved side surface of the side frame 22, and the side frame 22 is stopped by a screw 25, thereby A main body 21 is attached. With this screw fixing, the filter body 21 can be replaced by removing the screw 25. This replacement is effective when the filter body 21 is damaged or when the filter body 21 is replaced with another inspection filter body 21.

  The support shaft 24 is formed of a column and is inserted into the lens holder 11 into a cylindrical shaft 15 that allows the temples 12 and 12 to rotate. The support shaft 24 rotates within the cylindrical shaft 15, whereby the filter body 21. That is, the polarizing filter 20 can be rotated from a state where the polarizing filter 20 covers the front surfaces of the pair of test lens frames 11a and 11b (see FIG. 2) to a state where the polarizing filter 20 is retracted from the front surface (see FIG. 1).

  The optometry frame W of this embodiment is configured as described above, and as shown in FIG. 1, in the case of visual acuity correction test using the test lens 13, the polarization filter 20 is moved away, and as shown in FIG. In this case, the polarizing filter 20 is covered with the front surfaces of both the test lens frames 11a and 11b.

  At this time, as shown in FIGS. 3a to 3c, one of the protrusions 26 protruding inward from the horizontal flange 23 and the other protrusion 27 along the horizontal flange 23 are the test lens frames 11a and 11b (lens holder 11). However, when the other protrusion 27 comes into contact with the side surfaces of the test lens frames 11a and 11b, the end of the lens holder 11 gets over the corner portion 11 'of the lens holder 11 and elastically moves the tip thereof to the test lens frame 11a. , 11b, and the tip of one of the protrusions 26 is brought into contact with the side surfaces of the test lens frames 11a, 11b in a pressure contact state. For this reason, the polarizing filter 20 is positioned on the test lens frames 11a and 11b and does not move.

  The polarizing filter 20 can be attached to the lens holder 11 with a bolt-and-nut 31 as shown in FIG. 6 (a) or with an L-shaped pinch from the middle of the horizontal bar 23 as shown in FIG. 6 (b). It is possible to adopt a clothespin-like sandwiching mode in which a collar 28 is provided and the projections 29 at the tips of both collars 23 and 28 are fitted to the cylindrical shaft 15 of the lens holder 11 with the elasticity of the collar 23 and 28. At this time, the shapes of the horizontal rod 23, the side frame 22, and the filter main body 21 including the above-described protrusions 26 and 27 excluding the various attachment structures can be the same, but can be changed as appropriate.

The above embodiment is for the “deflection cross test”, but various inspections using the polarizing filter 20, such as the polarization red green inspection, the polarization balance inspection, the U-shaped inspection, the Worth 4 lamp inspection, the watch By adopting the polarizing filter 20 corresponding to the inspection for (rotating oblique) inspection, polarization stereo inspection, fusion width measurement inspection, cross ring inspection, etc., the above embodiment can perform those inspections. Of course.
Further, although the polarizing filter 20 is a separate left and right pair 20a, 20b, it goes without saying that the left and right ones may be integrated. At this time, it is preferable that the polarizing filter 20 can be removably moved to the upper portion of the lens holder 11 like the sunglasses attached to the commercially available glasses.

Action perspective view of one embodiment Other operation explanation perspective view of the same embodiment Main part front view of the same embodiment The principal part top view of the same embodiment Side view of the main part of the same embodiment The perspective view of the polarizing filter of the embodiment (A) is a front view, (b) is a plan view, (c) is a left side view, (d) is a right side view, (e) is a bottom view, and (f) is a rear view. is there. Side view of essential parts of other embodiments Perspective view for explaining visual acuity correction test using optometry frame Eye oblique view Illustration of each aspect in the same oblique position Illustration of correction of oblique position Visual diagram for normal operation in the deflection cross test One-sided explanatory diagram and correction explanatory diagram Other aspect explanatory drawing and correction explanatory drawing of the oblique position Other aspect explanatory drawing and correction explanatory drawing of the oblique position Illustration of conventional oblique inspection

Explanation of symbols

11 holder 11a, 11b test lens frame 12 temple 13 test lenses 20, 20a, 20b polarizing filter 21 the filter body 22 side frame 23 Yoko杆24 shaft 25 bis 26突杆 _{E, E 1, E 2} eyes a fusion point

Claims (9)

The test lens frame (11a, 11b) includes a lens holder (11) having a pair of test lens frames (11a, 11b) on the left and right, and temples (12) attached to the left and right of the lens holder (11). In the optometry frame (W), which is equipped with several test lenses (13) for checking and confirming the degree of vision correction by the test lenses (13),
Polarized red green inspection, polarization balance inspection, polarization cross inspection, U-shaped inspection, Worth 4 lamp inspection, clock (rotating oblique) inspection, polarization stereo inspection, fusion width measurement inspection, cross At least one pair of polarizing filters (20, 20a, 20b) for ring inspection is attached to the lens holder (11) so as to cover the front surfaces of the pair of test lens frames (11a, 11b), and An optometry frame characterized in that the polarizing filter (20) can be retracted from the front surface of the test lens frame (11a, 11b).   The pair of polarizing filters (20) is a different one (20a, 20b), and the pair of polarizing filters (20a, 20b) can be retreated from the front surfaces of the pair of test lens frames (11a, 11b), respectively. The optometry frame according to claim 1, wherein   The optometry frame according to claim 1 or 2, wherein the pair of polarizing filters (20) is freely replaceable with another polarizing filter for inspection.   A hole (15) is formed in the lens holder (11), a support shaft (24) of the polarizing filter (20) is inserted into the hole (15), and the polarizing filter is rotated by rotation around the support shaft (24). The optometry frame according to any one of claims 1 to 3, wherein (20) is configured to be retracted from the front surface of the test lens frame (11a, 11b).   The support shaft (24) can be inserted into and extracted from the hole (15), and the pair of polarizing filters (20) can be replaced with other polarizing filters for inspection. The optometry frame according to claim 4.   The polarizing filter (20) includes a filter body (21) that covers the front surface of the test lens frame (11a, 11b), a side frame (22) that supports the filter body (21) at its side edge, The optometry frame according to claim 4 or 5, comprising a recumbent ridge (23) extending laterally from the side frame (22) and the support shaft (24) provided on the recumbent ridge (23). .   The optometry frame according to claim 6, wherein the filter body (21) is screwed to the side frame (22) and can be freely replaced.   A pair of protrusions (26, 27) projecting forward and backward in the retracting direction of the polarizing filter (20) are provided on the horizontal lamp (23), and the polarizing filter (20, 20a, 20b) is attached to a test lens frame ( 11a and 11b) are placed in a predetermined position by covering the front surfaces thereof, the two protrusions (26 and 27) abut against the side surfaces of the test lens frames (11a and 11b), and the polarizing filter (20) is attached to the test lens frame. The optometry frame according to claim 6 or 7, wherein the optometry frame is positioned at (11a, 11b).   The protrusion (27), which is the front side of the both protrusions (26, 27), moves over the corner (11 ') of the lens holder (11) and has its elasticity at its tip to the test lens frame (11a, The optometry frame according to claim 8, which abuts on a side surface of 11 b).

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