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A method for predicting and optimizing the effect of optical intervention on myopia control

A shortsighted and optical technology, applied in optics, optical components, design optimization/simulation, etc., can solve problems such as difference in effect, and achieve the effect of avoiding treatment time

Inactive Publication Date: 2019-03-01
ZHONGSHAN OPHTHALMIC CENT SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Optical intervention is an important part of the effective means to control the progression of myopia. For example, orthokeratology lenses and multifocal contact lenses have been confirmed to be more effective in controlling myopia than ordinary single-light frame lenses, but there are individual differences in the effect

Method used

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  • A method for predicting and optimizing the effect of optical intervention on myopia control
  • A method for predicting and optimizing the effect of optical intervention on myopia control
  • A method for predicting and optimizing the effect of optical intervention on myopia control

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Experimental program
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Effect test

Embodiment 1

[0032] Embodiment 1 Calculation based on the area-weighted corneal refractive power change sum (ASCPS)

[0033] 1. Corneal topography raw data export

[0034] a. Export the raw data of two topographic examinations before orthokeratology lens shaping and 1 month or later

[0035] b. The original data of corneal topography include radius distance data files, axial curvature radius data files and corneal vertex diopters.

[0036] c. The radius distance data file and the axial curvature radius data file are matrix data of 300*32, each row represents the data on one semi-meridian, and two adjacent rows represent two semi-meridians separated by 1.2°. The radius distance data file represents the specific position of the measuring point of the instrument (the angle and distance in polar coordinates), and the data of each measuring point in the corresponding point of the axial curvature radius data file represents the measured axial curvature radius of the point.

[0037] 2. Derivati...

Embodiment 2

[0053] Embodiment 2 case comparison:

[0054] like figure 2 ASCPS of two typical cases shown

[0055] Case 1 baseline diopter -3.88D, ASCPS only -1.84D*mm after 1 month of orthokeratology 2 ( figure 2 A), 12 months after orthokeratology, the eye axis increased by 0.52mm, and the myopia control effect was poor.

[0056] Case 2 baseline diopter -4.00D, ASCPS reached 19.08D*mm after 1 month of orthokeratology 2 ( figure 2 B), 12 months after orthokeratology, the eye axis increased by 0.12mm, and the myopia control effect was good.

[0057] It has been proved by experiments that the ASCPS data after 1 month is used to predict the myopia control effect after 1 year, and the ASCPS is higher than 10D*mm 2 Among the patients, 100% of the myopia axial growth was less than 0.3mm after 1 year, suggesting that the myopia control effect is good, thus proving that the ASCPS index can indeed be used to predict and optimize the myopia control effect.

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Abstract

The invention discloses a method for predicting and optimizing the effect of optical intervention on myopia control, which uses the summation of corneal refractive power changes based on area weighting to predict or optimize the effect of myopia control. A parameter is established, called Area Weighted Corneal Power Shift (ASCPS). Therefore, the early ASCPS after optical intervention can be used to judge the long-term myopia control effect, so as to better predict and optimize the myopia control effect of optical intervention.

Description

technical field [0001] The present invention relates to the field of myopia control, more specifically, to a method for predicting and optimizing the effect of optical intervention (including orthokeratology lenses and multifocal contact lenses) on myopia control. Background technique [0002] High myopia affects the structure of the eyeball, greatly increasing the risk of blinding complications, resulting in impaired vision and even blindness. Once moderate to high myopia is formed, it may cause complications: retinal detachment, cataract, macular hemorrhage and macular degeneration, glaucoma, retroscleral staphyloma, retinal tear, etc. Therefore, controlling myopia has become an urgent problem to be solved. [0003] Optical intervention is an important part of the effective means to control the progression of myopia. For example, orthokeratology lenses and multifocal contact lenses have been confirmed to be more effective in controlling myopia than ordinary single-light fr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50G02B27/00
CPCG02B27/0012G06F30/20
Inventor 杨晓胡音李周越
Owner ZHONGSHAN OPHTHALMIC CENT SUN YAT SEN UNIV