Segmented Lens Element for Myopia Progression Control
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Solution Overview
Problem
Conventional single vision optical lenses fail to adequately correct myopia and hyperopia, particularly in children, leading to increased progression of myopia due to inaccurate focusing during near vision, which can cause the retina to extend and worsen the refractive defect.
Innovation Solution
A lens element designed to be worn in front of the eye, featuring a prescription portion for foveal vision and multiple optical elements that do not focus images on the retina for peripheral vision, slowing down the progression of abnormal refractions by reducing retinal deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional single vision optical lenses are used to correct foveal vision, then foveal vision correction is achieved, but peripheral vision causes retinal extension and myopia progression
Solution Approach 1:
The lens applies different optical properties to different zones: the central prescription portion maintains standard optical correction for foveal vision, while the peripheral optical elements (at least three elements in the peripheral zone) are specifically designed to create defocused images that do not focus on the retina. This local differentiation allows the lens to correct foveal vision accurately while simultaneously preventing peripheral-induced retinal extension and myopia progression.
2Reliability
If optical elements are added to prevent peripheral focusing, then myopia progression is slowed, but lens complexity increases
Solution Approach 1:
The lens is segmented into distinct functional zones: a central prescription portion for foveal vision correction and multiple discrete optical elements (at least three) positioned in the peripheral zone. This segmentation allows each zone to perform its specific function independently - the prescription portion corrects refractive error while the peripheral optical elements control myopia progression - while maintaining overall lens functionality.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The lens element effectively slows down the progression of myopia or hyperopia by reducing retinal deformation in peripheral vision, maintaining accurate focusing for foveal vision while preventing the retina from extending, thereby stabilizing refractive errors.
Implementation Method 1
at least one optical element has an optical function of not focusing an image on the retina of the eye for peripheral vision
Data Source
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AI summary
A lens element intended to be worn in front of an eye of a person comprising: - a prescription portion having a first refractive power based on a prescription for correcting an abnormal refraction of said eye of the person and a second refractive power different from the first refractive power; - a plurality of at least three optical elements, at least one optical element having an optical function of not focusing an image on the retina of the eye so as to slow down the progression of the abnormal refraction of the eye.