Myopia Control Lens with Peripheral Defocus and Light Scattering
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Solution Overview
Problem
Conventional eyeglass lenses for correcting myopia often exacerbate the condition by causing peripheral image focusing behind the retina, leading to increased myopia progression, and are costly and difficult to process, limiting their promotion and popularization.
Innovation Solution
An eyeglass lens design featuring a first area for myopia correction, a second area for focusing images in front of the retina to inhibit myopia development, and third island-shaped areas to reduce retinal image contrast by scattering light, with varying refractive powers and surface shapes to control refractive errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a conventional single-vision optical lens is used to correct myopia, then the central portion of the image is transmitted on the retina, but the peripheral portion is transmitted behind the retina, inducing growth of the eyeball and deepening of myopia
Solution Approach 1:
The lens applies different optical properties to different regions: the central area maintains standard myopia correction while the peripheral area incorporates micro-structures that scatter light to create defocus. This local differentiation allows the lens to correct central vision while simultaneously preventing peripheral myopia progression.
Solution Approach 2:
The lens is divided into functional segments: a central optical zone for clear vision and peripheral zones with micro-structures for myopia control. The peripheral area contains multiple small island-shaped regions that are spatially separated, creating a segmented pattern that selectively scatters light without completely blocking it.
2Reliability
If vision control lenses with complex multifocal structures are used, then myopia development can be inhibited, but the lenses are difficult to process and costly to manufacture
Solution Approach 1:
The patent replaces complex mechanical multifocal lens structures with a simpler single-vision base lens that incorporates micro-structures. Instead of using multiple lens surfaces or complex curvature variations, the invention uses small island-shaped micro-structures on a relatively simple lens surface, which can be manufactured using conventional molding or coating techniques.
Solution Approach 2:
The micro-structures are designed as small, simple features that can be manufactured cost-effectively using standard lens production methods. The island-shaped regions are simple geometric forms that require minimal processing complexity, making the overall lens more affordable and easier to mass-produce compared to complex multifocal designs.
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 effectively inhibits or slows down myopia development by focusing images correctly and reducing peripheral contrast, while being more cost-effective and easier to manufacture, facilitating wider adoption of vision control lenses.
Implementation Method 1
the third areas being used for cutting off or scattering light passing through the areas so as to reduce a contrast of a retinal image
Implementation Method 2
the first area having a refractive power with a myopia correction function; the second area being used for focusing an image on a position in front of a retina of an eye
Data Source
AI summary
Disclosed in the present disclosure is an eyeglass lens for preventing and controlling myopia. The eyeglass lens includes a lens body, the lens body includes a first area, a second area, and third areas, the first area is a regular area formed with an optical centre of the lens body as a centre, the first area has a refractive power with a myopia correction function, the second area is a peripheral area of the lens body, and the second area is used for focusing an image on a position in front of a retina of an eye, to inhibit myopia development of the eye. The present disclosure has a simple structure and rational design, when a patient views an object with the eyeglass lens for preventing and controlling myopia, an image is formed on the retina, meanwhile, an image is formed in front of the retina, and a contrast of imaging at the periphery of the retina is reduced, such that the eyeglass lens has a function of inhibiting or at least slowing down development of myopia of a human eye, and a machining cost can be effectively controlled, to facilitate promotion and popularization of vision protective lenses.