Peripheral Micro-Lens Layout for Myopia Control Eyewear
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Solution Overview
Problem
Conventional single vision optical lenses fail to address the progression of abnormal refractions such as myopia or hyperopia, particularly in children, leading to inaccurate focusing on near vision and potential worsening of the condition over time.
Innovation Solution
A lens element with a refraction area and multiple optical elements configured to increase mean sphere and/or cylinder from the center to the peripheral part, providing a refractive power that differs from the central prescription, and incorporating optical elements that do not focus images on the retina to slow down the progression of abnormal refractions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional single vision optical lenses are used to correct far vision, then the prescription refraction is corrected, but the focusing accuracy on near vision deteriorates and myopia progression is not suppressed
Solution Approach 1:
The lens is divided into multiple zones with different optical functions: a central refraction area for distance correction and multiple peripheral optical elements (micro-lenses) for defocus control. This segmentation allows simultaneous achievement of distance vision correction and myopia progression suppression without compromising near vision focusing accuracy.
Solution Approach 2:
Different regions of the lens are assigned different optical properties. The central region provides prescription refraction for distance vision, while the peripheral regions contain optical elements with varying mean sphere values that create controlled defocus. This local differentiation enables the lens to address multiple vision requirements in different spatial zones.
2Device complexity
If conventional single vision optical lenses are used, then the lens structure remains simple, but the ability to slow down myopia progression is lost
Solution Approach 1:
The lens incorporates multiple discrete optical elements (micro-lenses) arranged in specific patterns within the peripheral zones. While this increases structural complexity compared to conventional lenses, it enables precise control over light defocus to suppress myopia progression. The segmented design allows independent optimization of each micro-lens region.
Solution Approach 2:
The optical elements are configured with varying mean sphere parameters across different peripheral zones of the lens. This parameter variation creates the necessary defocus effect to slow down myopia progression while maintaining overall lens functionality. The gradual change in optical parameters from center to periphery optimizes the myopia control effect.
3Reliability
If optical elements are configured to increase mean sphere from center to periphery, then defocus is increased to suppress myopia, but the lens design complexity increases
Solution Approach 1:
The optical elements are strategically placed only in peripheral zones of the lens, leaving the central refraction area unchanged. This localized approach concentrates the myopia control function in specific regions while maintaining simple distance correction in the center, thereby reducing overall design complexity compared to a fully complex lens design.
Solution Approach 2:
Instead of making the entire lens complex with varying power throughout, the invention inverts the approach by keeping the central prescription area simple and conventional, and introducing complexity only in the peripheral zones where myopia control is needed. This inversion minimizes overall design complexity while achieving the therapeutic effect.
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 improving focusing accuracy and compensating accommodative lag, while maintaining aesthetic appeal and visual acuity.
Implementation Method 1
a refraction area having a refractive power based on a prescription for said eye of the person; and a plurality of at least three optical elements wherein the optical elements are configured so that along at least one section of the lens the mean sphere of optical elements increases from a point of said section towards the peripheral part of said section
Data Source
AI summary
A lens element worn in front of an eye of a person includes a refraction area having a refractive power based on a prescription for the eye of the person, and a plurality of at least three optical elements, wherein the optical elements are configured so that along at least one section of the lens the mean sphere of optical elements increases from a point of the section towards the peripheral part of the section.