JPH067703U - Optometry device - Google Patents

Abstract

(57) [Abstract] [Purpose] It is a technical object to provide an optometry device that allows an examiner to confirm a presented optotype in a natural state. In an optometry apparatus in which a combination of optical elements such as a lens is switched to an inspection window and an eye to be inspected can see the optotype through the inspection window, a mirror that reflects the presented optotype to the examiner side. -Is provided near the inspection window.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an optometry apparatus for inspecting a subject by showing an optotype to an examinee through an examination window in which lenses and the like are switched and obtaining a response of the examinee regarding the visually recognized state.

[0002]

[Prior art]

 A general optometry apparatus of this type has a plurality of turret disks on which a large number of lenses are arranged, and various optical characteristics are given to the eye to be inspected by combining the lenses on the turret disks. The subject is located opposite to the optotype presenting device such as a visual acuity chart, and the examiner is located between the two devices and out of the visual field of the subject. Further, in the near point examination, a near point rod is attached to the optometry apparatus to present the near point target to the subject.

[0003]

[Problems to be solved by the device]

 However, with the above-described device, the examiner is forced to look back at the optotype presenting device in order to confirm the optotype that is sometimes presented while observing the state of the subject. Further, in the near point examination, there is an inconvenience that an extremely unnatural movement such as looking in is necessary for the examiner to confirm the presented target. Recently, a so-called space-saving type optotype presenting device that stores a mirror in a housing or the like and uses the reflected reflection of the mirror has been proposed, but this device and an optometry device are used as a system. However, there is a drawback that it is difficult to check the target. The present invention has been devised in view of the above-mentioned drawbacks, and an technical object thereof is to provide an optometry apparatus that allows an examiner to confirm a presented optotype in a natural state.

[0004]

[Means for Solving the Problems]

 The optometry apparatus of the present invention is characterized by having the following configuration in order to solve the above problems. (1) In a optometry device in which a combination of optical elements such as lenses is switched to the inspection window and the eye can see the target through the inspection window, the presented target is reflected to the examiner side. A mirror is provided near the inspection window.

(2) The mirror of (1) is provided above the left and right inspection windows.

(3) The eye examination apparatus of (1) is rotatably supported in the space, and the mirror operates in synchronization with the rotation of the eye examination apparatus.

(4) The optometry apparatus of (1) has a mounting member for mounting the mirror, and the mirror is held by the mounting member via a ball bearing.

[0008]

First Embodiment One embodiment of the present invention will be described below with reference to the drawings. 1A and 1B are external views of the apparatus according to this embodiment. FIG. 1A is a view from the optotype side, and FIG. 1B is a side view thereof. Reference numeral 1 is a main body of the optometry apparatus, in which a plurality of lens disks (not shown) are arranged. By operating an operation panel (not shown) to electrically drive the lens disk, a combined optical system of optical elements having specified optical characteristics is arranged in the inspection window 2. The distance between the left and right inspection windows 2 can be changed by a known tilting mechanism. Reference numeral 3 denotes a holding arm for holding the optometry apparatus main body in a space, and the optometry apparatus main body 1 is held by the holding arm 3 via a rotary shaft 4 fixed to the optometry apparatus main body 1. 5 is a washer and 6 is a leaf spring. Reference numeral 7 denotes a rotation fixing knob, which is loosened when rotating the rotating shaft 4 with respect to the holding arm 3 and is tightened when fixing the rotating shaft 4 to the holding arm 3. Reference numeral 8 denotes a mirror mounting plate on which the mirror 9 is mounted. The mirror mounting plate 8 is fixed to the rotary shaft 4, and the mirror mounting plate 8 also rotates as the rotary shaft 4 rotates. The mirror 9 is mounted on the mirror mounting plate 8 via a ball bearing 10. For this reason, when the rotation shaft 4 rotates and the optometry apparatus main body 1 rotates with respect to the holding arm 3, the mirror 9 also rotates in the same manner, and the mirror 9 and the optometry apparatus main body 1 move relative to each other. Physical relationship does not change. Therefore, even if the holding arm 3 is rotated horizontally, the examiner can move without moving the angle of the mirror 9 as long as the optometry apparatus main body 1 is positioned toward the optotype presenting apparatus at a predetermined angle. You can see the target almost as before.

As shown in FIG. 2, the ball bearing 10 is composed of a fixed portion 11 for bearing and a rotating shaft 12 having a spherical surface formed at its tip, and the angle of the mirror 9 can be freely changed. Reference numeral 13 is a near-point rod mounting portion for mounting the near-point rod, and the near-point rod 14 shown in FIG. 3 can be attached. An optotype holding unit 15 that is movable in the axial direction is fitted to the near-point bar 14, and the optotype holding unit 15 holds a near vision table 16. An optotype plate having a plurality of near visual acuity targets is arranged inside the near visual acuity table 16, and the near visual acuity is switched and arranged in the presentation unit 17 of the near visual acuity table 16. The near vision target presented on the presentation unit 17 is reflected by the mirror 9 and is observed by the examiner's eye E.

[0010]

Second Embodiment A second embodiment is an example in which a mirror is provided in the optometry apparatus main body 1 having a traditional shape. (A) is a view from the optotype side, (b) is a side view thereof, (c) ) Is a plan view. 20 is an inspection window, 21 is a mirror, 22 is a ball bearing, 23 is a mirror mounting plate, 24 is a holding arm, and 25 is a rotation fixing knob. The mirror mounting plate 23 is fixedly arranged on a rotary shaft (not shown). Reference numeral 26 denotes a near-point rod holding portion, which holds the near-point rod indicated by the dotted line in (c), and tilts the near-point rod holding portion 26 to the front side around the rotating shaft 27 during the near-point measurement.

In the first and second embodiments described above, the mirror is arranged substantially in the center of the main body of the optometry apparatus, but if the optometry distance is 5 m, there is a considerable margin in the arrangement position of the mirror, and The mirror can be installed at a position that does not interfere with the visual field of the optometry and does not hinder the operation of the knob. Also, the mirror is not necessarily one and may be divided into left and right. For the dish, a mirror-reflecting metal plate mirror may be used in addition to an ordinary glass mirror.

[0012]

[Effect of device]

 According to the device of the present invention, the examiner can concentrate his or her attention in the direction of the eye to be inspected without significantly moving the line of sight, so that accurate eye examination can be performed. Further, the presented optotype can be always checked, and confusion due to an operation mistake can be prevented, so that the eye examination can be performed smoothly.

[Brief description of drawings]

FIG. 1 is an external view of an optometry apparatus according to a first embodiment.

FIG. 2 is an explanatory diagram showing a configuration of a ball bearing 10.

FIG. 3 is an explanatory view showing a near point bar.

FIG. 4 is an explanatory diagram showing an optometry apparatus according to a second embodiment.

[Explanation of symbols]

 1 Optometry apparatus main body 2 Inspection window 8 Mirror mounting plate 9 Mirror

Claims (4)

[Scope of utility model registration request] 1. An optometry apparatus in which a combination of optical elements such as lenses is switched to an inspection window so that an eye to be inspected can see the optotype through the inspection window. An optometry apparatus, wherein a mirror is provided near the inspection window. 2. The optometry apparatus according to claim 1, wherein the mirror is provided above the left and right inspection windows. 3. The optometry apparatus according to claim 1, wherein the optometry apparatus is rotatably supported in a space, and the mirror operates in synchronization with the rotation of the optometry apparatus. 4. The optometry apparatus according to claim 1, further comprising a mounting member for mounting the mirror, wherein the mirror is held by the mounting member via a ball bearing.