Shared-Edge Lens Elements for Clearer Refractive Error Control
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Solution Overview
Problem
Existing lenses that inhibit the development of refractive errors by focusing images away from the retina reduce visual clarity and provide unsatisfactory wearing comfort due to excessive refractive power transitions at the edges of insular regions.
Innovation Solution
The lens design incorporates insular regions that share edges with each other, reducing the total perimeter of edges and maintaining the number of insular regions to enhance visual clarity while maintaining the refractive error inhibition function.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If insular regions are designed to be separate and self-contained from each other, then the refractive error inhibition function is achieved, but the visual clarity is reduced due to excessive edge perimeter
Solution Approach 1:
Adjacent insular regions share common edges, merging their boundaries. This reduces the total edge perimeter of insular regions while maintaining their separate optical functions, thereby improving visual clarity without compromising the refractive error inhibition capability
Solution Approach 2:
The lens is segmented into a base region and multiple insular regions with different refractive powers. The insular regions are strategically positioned and sized to create specific optical effects for refractive error management while controlling the total edge length through shared boundaries
2Reliability
If the number of insular regions is increased to enhance refractive error inhibition, then the inhibition effectiveness is improved, but the total edge perimeter increases reducing visual clarity
Solution Approach 1:
Multiple insular regions are arranged to share edges with adjacent regions, merging their boundaries. This allows increasing the number of insular regions for better refractive error control while the shared edges prevent proportional increase in total perimeter, thus maintaining visual clarity
3Object-affected harmful factors
If insular regions are made smaller to improve visual clarity, then the visual clarity is improved, but the refractive error inhibition function is weakened
Solution Approach 1:
The lens provides dynamic optical correction by combining multiple insular regions with different refractive powers. The shared edge design allows flexible arrangement of varying sized insular regions that can be optimized for both visual clarity and refractive error inhibition based on individual prescription needs
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 shared-edge design significantly improves visual clarity by minimizing refractive power transitions, providing a more comfortable wearing experience without compromising the ability to inhibit refractive errors.
Implementation Method 1
a second refractive region, having a refractive power different from the first refractive power and having a function of focusing an image at a position other than a retina of the eye to inhibit development of the refractive error of the eye
Implementation Method 2
The light scattering centers have a size in a range of 0.1 mm to 0.5 mm and are spaced apart by 0.8 mm or less, and for incident light transmitted by each ophthalmic lens, the ophthalmic lens scatters light incident onto the light scattering centers
Data Source
AI summary
This application provides a lens element, an optical lens group, a mold, and spectacles. The lens element includes: a base region, where the base region includes a prescription region for correcting a refractive error of an eye; and a plurality of insular regions, where the insular regions include regions for inhibiting development of the refractive error of the eye, where at least some of the insular regions are adjacent to each other and have a shared edge; and for edges of all the insular regions on the lens element, a length of a shared edge portion is L1, a length of a non-shared edge portion is L2, and a ratio of L1 to L2 is 0.3 or more. The optical lens group includes a first lens element and a second lens element. When the first lens element and the second lens element are placed parallel to each other and coaxially, at least one relative position exists for the first lens element and the second lens element, to make the first lens element and the second lens element meet a specific relationship.