Eyeglass Lens Defocus Regions for Comfortable Myopia Suppression
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Solution Overview
Problem
Existing eyeglass lenses that suppress myopia progression by using convex regions to focus light in front of the retina can compromise comfort due to increased size of these regions, affecting the user's experience.
Innovation Solution
The eyeglass lens design incorporates a base region with a plurality of defocus regions that increase refractive power from the center to the peripheral portion, causing light to enter the retina as diverging light, thereby enhancing the myopia progression suppression effect without enlarging the convex regions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the size of convex regions is increased to enhance myopia progression suppression, then the myopia progression suppressing effect is improved, but the comfort of using the eyeglass lens deteriorates
Solution Approach 1:
The patent applies local quality by varying the refractive power within different regions of the lens. Specifically, the defocus regions have different refractive powers from the base region, creating localized optical properties that induce myopia suppression without requiring large convex regions. This allows targeted myopia control in specific areas while maintaining overall lens comfort and visual quality.
Solution Approach 2:
The patent changes the refractive power parameter across different regions of the lens. By defining defocus regions with specific refractive power ranges (different from the base region), the patent achieves myopia progression suppression through parameter variation rather than increasing the physical size of convex regions. This maintains lens comfort while achieving the therapeutic effect.
2Reliability
If the refractive power of defocus regions is increased to enhance the myopia progression suppressing effect, then the light spot size change or intensity density change is improved, but the visual quality and comfort may deteriorate
Solution Approach 1:
The patent optimizes the refractive power parameter within specific ranges to achieve the desired balance. By defining that defocus regions have refractive powers different from the base region (without specifying excessive values), the patent ensures sufficient myopia suppression effect while avoiding visual quality degradation and discomfort that would result from overly high refractive powers.
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
This design improves myopia progression suppression while maintaining comfort by increasing the divergence degree of the diverging light flux, thus enhancing the accommodative microfluctuation-induced change in light spot size or intensity density without compromising the lens's usability.
Implementation Method 1
a plurality of defocus regions that are in contact with the base region, in which a light flux that passes through at least part of each defocus region is incident on the position A as diverging light
Data Source
AI summary
The present invention provides an eyeglass lens and its related techniques, the eyeglass lens including: a base region that causes a light flux that has entered from an object-side face to exit from an eyeball-side face, and to enter an eye and converge at a position A on a retina; and a plurality of defocus regions that are in contact with the base region, in which a light flux that passes through at least part of each defocus region is incident on the position A as diverging light, wherein a refractive power in the defocus regions increases in a direction from a center portion to a peripheral portion.