JP2010187786A - Eye shielding device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an eye shielding device for examining a dominant eye of a subject easily without a special device for examining the dominant eye. <P>SOLUTION: This eye shielding device comprises a shielding section 10 for shielding a visual line and a grip section 12 fixed to the shielding section 10. Additionally, a through-hole 14 is formed in the shielding section 10 for passing the visual line through, and a lid 16 is attached to the shielding section 10 for covering the through-hole 14 openably and closably. The through-hole 14 is covered with the lid 16, and then it can be used as a usual eye shielding device. When the lid 16 is moved to open the through-hole 14, a dominant eye can be examined by using the through-hole 14. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an eyepiece for shielding a line of sight of one eye during a visual acuity test.

  It is known that human vision has “dominant eyes” (dominant eyes). When looking at an object with both eyes, the eye that is mainly used to recognize the object is called the dominant eye. A simple method for examining the dominant eye is as follows. Extend your arms forward, create a triangular window with your index finger and thumb, and look through the window at a distant target with both eyes. In this state, when the line of sight of the left eye is blocked, if the target is exactly within the window, the right eye is dominant. Conversely, when the right eye is blocked and the target is exactly within the window, the left eye is the dominant eye. In a spectacles store, when making a customer's glasses, the customer's dominant eye may be examined. At that time, for example, the dominant eye can be confirmed by the method described above.

  Japanese Patent Publication No. 56-29539 (Patent Document 1) is known as an instrument for confirming the dominant eye of humans. This instrument is an auxiliary tool for eyeglass adjustment, and forms a vertical line at the center in the left-right direction of the mirror. The subject looks in the mirror, aligns the nasal streaks of the face in the mirror with the vertical line, then covers the left and right eyes one by one, observes the face in the mirror, and the vertical line aligns with the center of the face. The eye that looks good is the dominant eye.

  Although this invention is invention of an eye shield, when the prior art example which devised the eye shield is given, Unexamined-Japanese-Patent No. 2008-36370 (patent document 2) is known, for example. In this known technique, an inspector can observe the shielding eye of the subject through the shielding part by using a diffuser plate for the shielding part of the eye shield. There is no known example in which an eyepiece is devised for examining the dominant eye.

Japanese Examined Patent Publication No. 56-29539 JP 2008-36370 A

  It is convenient if there is a simple instrument for examining a subject's dominant eye in a spectacle store. It would be convenient if it was possible to examine the dominant eye of the subject by using an eye shield that is normally provided in an eyeglass store, and it was not necessary to prepare a special instrument separately. Although the thing like the above-mentioned patent document 1 can investigate a dominant eye, it is necessary to prepare a dedicated instrument.

  An object of the present invention is to provide an eye shield capable of easily examining a subject's dominant eye without preparing a dedicated instrument for examining the dominant eye.

  The eyepiece of the present invention includes a shielding part that shields the line of sight and a grip part fixed to the shielding part. And the through-hole for letting a line of sight pass is formed in the shielding part, and the lid | cover which covers the through-hole so that opening and closing is possible is attached to the shielding part. If the through hole is covered with a lid, it can be used as an ordinary eye shield. If the through-hole is opened by moving the lid, the dominant eye can be examined using the through-hole.

  According to the present invention, it is possible to examine the dominant eye of the subject very easily using the eye shield provided by the spectacle store by combining the test tool for the dominant eye and the eye shield. it can.

FIG. 1 is a front view of an embodiment of the eyepiece of the present invention.

  FIG. 1 is a front view of an embodiment of the eyepiece of the present invention. This eyepiece comprises a shielding part 10 and a grip part 12. The grip portion 12 is fixed to the shielding portion 10. The grip portion 12 is a portion that the subject grips with a hand. The shielding unit 10 shields the line of sight of one eye of the subject. The shielding part 10 has a substantially oblong elliptical shape. A circular through hole 14 is formed in the center of the shielding portion 10. The through hole 14 can be freely opened and closed by a lid 16. The lid 16 has a slightly larger area than the through hole 14 and can completely cover the through hole 14. The lid 16 is substantially circular, and one point on the circumference of the lid 16 projects outward in the radial direction. At the protruding portion 17, the lid 16 is attached to the shielding portion 10 by a screw 18 so as to be swingable.

  The usage method of the eye shield of FIG. 1 is as follows. When the lid 16 is swung to the position of the imaginary line 20 in FIG. 1, the through hole 14 is covered with the lid 16. In this state, the eye shield exhibits a normal line-of-sight shielding function. For example, it is possible to block the line of sight of one eye of the subject during a visual acuity test. In that case, the subject brings an eyepiece close to one eye. In order to examine the dominant eye of the subject, the lid 16 is swung to the position depicted by the solid line in FIG. Then, the arm of the subject holding the eye shield is extended forward so that a distant target enters the through hole 14 when viewed with both eyes. Next, for example, when the line of sight of the left eye is shielded with a hand, if the target is exactly within the window, the right eye is dominant. Conversely, when the right eye's line of sight is blocked by hand, the left eye is the dominant eye if the target is exactly within the window.

  In the above-described embodiment, the shape of the through hole 14 is circular, but the shape of the through hole 14 may be other shapes such as a triangle. Further, the lid 16 can be swung by the screw 18, but can be swung by a pin connection or can be slidable in the lateral direction. Any structure of the lid 16 may be adopted as long as the through hole 14 can be freely opened and closed.

DESCRIPTION OF SYMBOLS 10 Shield part 12 Grip part 14 Through-hole 16 Lid 17 Protrusion part 18 Screw 20 Imaginary line

Claims (2)

In an eyepiece comprising a shielding part that shields the line of sight and a grip part fixed to the shielding part,
A through hole for passing the line of sight is formed in the shielding part,
A lid that opens and closes the through hole is attached to the shielding part,
An eye shield characterized by that.   The eye shield according to claim 1, wherein the lid is swingably attached to the shield part.

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