Myopic diopter measuring system and method

A measuring method and technology of measuring system are applied in the field of measuring system of myopia diopter, which can solve the problems of inability to obtain professional training in optometry operation, inappropriate, complicated operation, etc., and achieve the effect of simplifying the process of preparing glasses, high efficiency and simple measurement.

Inactive Publication Date: 2018-09-25
分界线(天津)网络技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The most important thing in the spectacle preparation process is optometry, which uses the state of emmetropic eye as the standard to measure the degree of vergence difference between the subject eye and emmetropic eye. The commonly used equipment is optometry, which occupies a large part of clinical work. Compared with the low efficiency and complicated operation of the traditional retinoscopy method, the refractometer uses infrared, electronic, computer and other technical means to check the focus of the light after it enters the eyeball, and has the advantages of fast measurement speed and convenient use. In actual use, it is found that there are still some problems with the optometrist: 1. The optometrist is a special hardware, and it is necessary to hire a professional optometrist, who will operate step by step during the measurement and complete the measurement of the diopter of myopia. It is difficult for ordinary users to purchase it specially. The refractometer is expensive, and professional training on refraction operation cannot be obtained; 2. The accuracy of the refractor is affected by many factors, such as: poor coordination of the head and eyes of consumers, lack of concentration of gaze, and excessive nervousness of consumers, etc. 3. The refractometer can only measure the approximate diopter of myopia, and provide a reference for understanding the degree of refraction of consumers. In the end, the optometrist still has to base Consumers' subjective feelings to try on inserts to determine the appropriate degree

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  • Myopic diopter measuring system and method

Examples

Experimental program
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Effect test

Embodiment 1

[0124] A 38-year-old consumer with a height of 174 cm, male, is in the normal lighting environment of the shopping mall, using a mobile phone Xiaomi NOTE2, standing under the light tube, covering the right eye, holding the mobile phone from far to near for myopia of the left eye For the measurement of diopter, keep the mobile phone at a constant speed during the movement, and the line of sight observed by the left eye is roughly perpendicular to the screen.

[0125] The picture displayed on the screen of the mobile phone is close to the position of the camera. The consumer moves the mobile phone from far to near. When the consumer just sees the E mark clearly, press the camera button to obtain the facial image at the far point, and the consumer clicks to save After pressing the button, click the Calculate button.

[0126] Calculate with OpenCV:

[0127] (1) Perform color space conversion processing on the facial image to obtain a grayscale image;

[0128] (2) Carry out histo...

Embodiment 2

[0138] A consumer, 18 years old, 160 cm tall, female, is in the natural light environment of the street, using an iphone4S mobile phone, standing under the shade of a tree, covering the left eye, holding the mobile phone to measure the myopia diopter of the right eye from far to near , roughly keep the mobile phone at a constant speed during the movement, and the line of sight observed by the right eye is roughly perpendicular to the screen.

[0139] The picture displayed on the screen of the mobile phone is close to the camera. There are multiple circles with five-pointed stars embedded in a row. The consumer moves the mobile phone from far to near. When the consumer just sees the circle and the five-pointed star clearly, press Press the camera button to obtain the facial image at the far point. After the consumer clicks the storage button, then clicks the calculation button.

[0140] The calculation process is the same as that in Embodiment 1, and the pixel value of the on-i...

Embodiment 3

[0147] A 31-year-old consumer with a height of 175 cm and a male was placed in the natural lighting environment of the street (in the morning on a sunny day), in the lighting environment of school classroom lamps (at noon on a sunny day), and in the natural lighting environment of the family during the day (afternoon on a sunny day). Measure the diopter of the right eye. The measurement data and the calculation results are shown in Table 1. The handheld terminal is used to move outdoors, and the mobile phone is used outdoors and the tablet computer is used indoors. Other conditions are identical with embodiment 2. The pixel value of the on-image diameter of the iris at a near point is 162.

[0148] The pixel of the facial image measured at the near point is 960*1280, and the scale is 162 / 960=0.169, according to image 3 Check the value of the curve to get the visual distance Y=8.3 cm, and get the adjusted diopter to be -12D; the adjustment range=15-0.25*31=7.25D

[0149] Adj...

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Abstract

The invention relates to a myopia diopter measuring system. The system is characterized by comprising an image acquisition module, an image processing module and a calculation module. The image acquisition module is used for acquiring a face image of a consumer at the far point; the image processing module is used for acquiring the diameter of the iris on the far point face image; the calculationmodule is used for obtaining the myopic diopter. According to the system, the myopic diopter can be measured by a user or measured by an optical shop, the influence of subjective factors of the consumer during trial wearing of lenses in the traditional glasses preparation process can be avoided, and the glasses preparation process is simplified. Each consumer can clearly grasp changes in myopia and carry out eye care under the advice of diet and life provided by software.

Description

[0001] Statement of priority [0002] The technical solution of claim 1 of the present invention requires the content in the specific implementation plan of the description of the invention patent application with the application number 2017102931321 submitted to the Patent Office of the State Intellectual Property Office of China on April 28, 2017; [0003] The technical solution of claim 2 of the present invention claims the priority of the technical solution of claim 1 of the invention patent application with application number 2017102931321 submitted to the Patent Office of the State Intellectual Property Office of China on April 28, 2017; technical field [0004] The invention belongs to the technical field of myopia diopter detection, in particular to a measurement system and method for myopia diopter. Background technique [0005] When the eyeball is adjusted to be still, the focus of the parallel light from 5 meters away is just on the retina after the refraction of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B3/032A61B3/028A61B3/11G06K9/00G06K9/46
CPCA61B3/0285A61B3/032A61B3/112G06V40/193G06V40/197G06V10/48
Inventor 阎辉高仁福
Owner 分界线(天津)网络技术有限公司
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