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A subjective optometry device and subjective optometry method

A subjective, optical axis technology, used in medical science, eye testing equipment, diagnosis, etc., can solve the problems of inaccurate clear and fuzzy judgment of optotypes, and low accuracy of optometry results.

Active Publication Date: 2017-10-13
深圳莫廷医疗科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention discloses a subjective optometry device and a subjective optometry method, the purpose of which is to solve the inaccuracy of the optometry results caused by the inaccurate judgment of the clarity and fuzziness of the visual targets seen by the human eye when observing the visual targets during the optometry process. high problem

Method used

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  • A subjective optometry device and subjective optometry method
  • A subjective optometry device and subjective optometry method
  • A subjective optometry device and subjective optometry method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0109] refer to Figure 4 , one of the subjective optometry devices announced by the present invention, including: a lens group 1 and a light-transmitting plate 2 composed of at least one imaging lens, the focal length f of the front surface of the cornea of ​​the tested human eye E located on the side of the lens group 1 0 At , the light-transmitting plate 2 is set on the optical axis 3 on the other side of the lens group 1 and can move back and forth along the optical axis 3. The thickness of the light-transmitting plate is h, and the refractive index is n. The front surface (namely, surface A) of the light-transmitting plate 2 is provided with a main visual mark, and the rear surface (ie, surface B) is provided with a reference visual mark. Here, the front surface and the rear surface are relative to the position of the human eye E. The side (A side) of the light-transmitting plate 2 that is close to the human eye E is called the front surface, and the side (B side) that is ...

Embodiment 2

[0114] refer to Figure 4 , this embodiment discloses another subjective optometry device, including: a lens group 1 and a light-transmitting plate 2 composed of at least one imaging lens, and the focal length f of the front surface of the cornea of ​​the tested human eye E located on the side of the lens group 1 0 , the light-transmitting plate 2 is arranged on the optical axis 3 on the other side of the lens group 1 and can move forward and backward along the optical axis 3 . The transparent plate has a thickness h and a refractive index n. refer to figure 2 , the front surface of the light-transmitting plate 2 (ie, surface A) is provided with a first astigmatism meter, and the rear surface of the light-transmitting plate 2 (ie, surface B) is provided with a second astigmatism meter. figure 2 Among them, the first astigmatism table consists of a number of lines of the same specification with uniform thickness, equal length and equal density, centered on the center of the ...

Embodiment 3

[0126] refer to Figure 5, the present invention also discloses a third subjective optometry device, comprising: a lens group 1 composed of at least one imaging lens, a cylindrical lens 4 and a light-transmitting plate 2 arranged on the optical axis in sequence, and a cylindrical lens 4 and a light-transmitting plate 2 Can move back and forth along the optical axis 3. The thickness of the transparent plate 2 is h, and the refractive index is n. The focal length of cylindrical lens 4 is f 2 ; The focal length f of the corneal front surface of the tested human eye E located on the side of the lens group 1 0 , the cylindrical lens 4 and the transparent plate 2 are located on the other side of the lens group 1 . The front surface (i.e. A face) of the light-transmitting plate 2 is arranged as figure 2 The first astigmatism chart is shown. The rear surface (i.e. the B face) of the light-transmitting plate 2 is arranged as figure 2 The second astigmatism chart is shown. Simi...

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Abstract

The invention discloses a subjective optometry device and a subjective optometry method. The subjective optometry device comprises a lens assembly and a light-transmitting plate, wherein the lens assembly consists of at least one imaging lens; the thickness of the light-transmitting plate is h; the reflective rate of the light-transmitting plate is n; the front surface of the cornea of a tested person is positioned at a focal length f0 on one side of the lens assembly; the light-transmitting plate is arranged on the optical axis on another side of the lens assembly and can move forwards and backwards along the optical axis; a pattern is arranged on the front surface of the light-transmitting plate; another pattern is arranged on the rear surface of the light-transmitting plate. In optometry, when the light-transmitting plate is moved, the pattern on the front surface of the light-transmitting plate 'can be seen' and the pattern on the rear surface of the light-transmitting plate 'cannot be seen', the 'can be seen' pattern takes the 'cannot be seen' pattern as reference, and then a relatively accurate optometry value can be obtained. By adopting the subjective optometry device and the subjective optometry method disclosed by the invention, optometry precision and detection accuracy can be improved.

Description

technical field [0001] The invention belongs to the field of ophthalmology detection equipment, and in particular relates to a subjective optometry device and a subjective optometry method realized by using the device. Background technique [0002] The patent with the application number 201310207478.7 and the invention name "A Subjective Refractometer and Method for Refraction" announced that the tester can obtain the spherical power and Cylinder degree. That is, part of the content of Embodiment 1: "When the marker moves to a certain position x, the marker When the lines in all directions are clear at the same time, the spherical power of the testee is D 1 =x / f 0 2 , at this time the subject has no astigmatism or the astigmatism is very small, negligible, and the cylinder power is 0. when marker When the lines in all directions are not clear at the same time, there are two positions that make the two radial lines perpendicular to each other clear. However, in pract...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B3/032
CPCA61B3/032
Inventor 何卫红郭曙光王辉万明明张德兴栾盾
Owner 深圳莫廷医疗科技股份有限公司