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New method for measuring near pupil distance and near pupil height

A near-pupillary distance technology, applied in the field of measuring near-pupillary distance and near-pupillary height, can solve problems such as affecting the clarity of near objects with glasses, and achieve the effect of reducing the prism effect and seeing the near field of vision clearly.

Inactive Publication Date: 2013-07-24
OPTOMETRY SERVICE CENT OF EYE HOSPITAL SUN YAT-SEN UNIV
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AI Technical Summary

Problems solved by technology

, the pupil height is reduced by 1mm, which has a great influence on the angle of each person's near vision), which affects the clarity of near objects when wearing glasses

Method used

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  • New method for measuring near pupil distance and near pupil height
  • New method for measuring near pupil distance and near pupil height

Examples

Experimental program
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Effect test

Embodiment 1

[0020] Measure the near pupillary distance and near pupil height of the left and right eyes of the examinee, as follows:

[0021] (1) The examiner and the examinee sit opposite each other, and the eyes of the two people are kept at the same height;

[0022] (2) According to the examinee's usual near-sighted habits, the examiner places the mirror in front of the examinee's habitual near-sight distance, and the examinee wears glasses and stares at the word "ten" in the mirror, as in figure 1 shown;

[0023] (3) The examiner closes his left eye, holds a flashlight and projects the examinee's right eye in the mirror, and marks the reflective point of the examinee's right eye cornea on the spreader, which is the mark point 2 of the right eye spreader;

[0024] (4) The examiner closes his right eye, holds a flashlight and projects the examinee's left eye in the mirror, and marks the reflective point on the examinee's left eye cornea when seeing near, which is the mark point 3 of th...

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Abstract

The invention provides a new method for measuring pupil distance and pupil height. According to the needs of different people for near vision and the personal eyeglass usage habit, the near pupil distance and the near pupil height of the left and right eyes are measured by a ruler through pupil reflection points reflected by the mirror surface when near vision is taken. According to the new method provided by the invention, the optical center and the optical height of people can be accurately measured when the people see the near object, and thus, the prism effect generated by lens when people take near vision can be reduced, the asthenopia symptoms, such as ghost image in vision, eye swelling and headache, caused by difference between the optical center distance and the pupil distance can be reduced, and a clear field of near vision is provided for a wearer.

Description

Technical field: [0001] The invention relates to a visual acuity measurement method, in particular to a new method for measuring near pupil distance and near pupil height. Background technique: [0002] When wearing glasses, because everyone's face size is different, the distance between the two eyes may be different, so the position that each person sees from the center of the lens of the glasses is also different. If one of the optical centers of the lens is higher and the other is lower, or one is to the left and the other is to the right, the wearer may experience distortion of seeing things, eye swelling, and in severe cases, headaches and other symptoms. Especially middle-aged and elderly people, due to the hardening of the lens of the eyes, the adjustment function is reduced, and the near objects are not clear, commonly known as "presbyopia". , the position of the center of the pupil will change, that is to say, the distance from the optical center of the lens requir...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02C13/00A61B3/11
Inventor 陈翔苏翠云黄家欣刁红星
Owner OPTOMETRY SERVICE CENT OF EYE HOSPITAL SUN YAT-SEN UNIV
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