Spectacle Lens Ring Structures for Myopia Retardation
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Solution Overview
Problem
Existing spectacle lens designs, such as those described in WO 2019/166657 A1, are not optimally effective in slowing down myopia progression, and their manufacturing processes are complex, requiring specific adaptations and surface modifications.
Innovation Solution
A spectacle lens design featuring an aperture surrounded by at least two ring-shaped focusing structures and a ring-shaped diffuser, with various configurations of focusing structures and diffusers to enhance myopia retardation, and a simplified manufacturing method using a computer-implemented approach.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing spectacle lens designs with peripheral retinal image control are used, then myopia progression is retarded, but the manufacturing process becomes complex requiring specific adaptations and surface modifications
Solution Approach 1:
The lens is divided into distinct functional zones: a central clear aperture for unobstructed central vision and multiple ring-shaped focusing structures at different radial positions for peripheral myopic defocus control. This segmentation allows each zone to be optimized independently while simplifying the overall manufacturing approach compared to complex surface modifications.
Solution Approach 2:
Different regions of the lens have different optical properties: the central aperture provides clear vision with standard optical quality, while the ring-shaped structures provide controlled myopic defocus with specific local optical qualities. This local differentiation enables effective myopia control without requiring complex adaptations across the entire lens surface.
2Reliability
If multiple ring-shaped focusing structures are added to improve myopia retardation, then the effectiveness increases, but the device complexity increases
Solution Approach 1:
Multiple ring-shaped focusing structures are nested concentrically around the central aperture, with each ring positioned at a different radial distance. This nested arrangement maximizes the use of peripheral lens areas while maintaining a relatively simple overall structure that can be manufactured using standard techniques with minimal adaptations.
Solution Approach 2:
The ring-shaped focusing structures serve multiple functions: they provide myopic defocus control for peripheral retinal image management, maintain structural integrity of the lens, and can be integrated with standard lens manufacturing processes. This multi-functionality reduces the need for additional complex components or adaptations.
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 new design effectively increases the ability to slow down myopia progression and simplifies the manufacturing process by utilizing a computer-optimized spectacle lens design with ring-shaped focusing and diffusing structures.
Implementation Method 1
a ring-shaped diffuser is arranged between neighboring ring-shaped focusing structures
Implementation Method 2
at least two ring-shaped focusing structures which surround the aperture and which provide an additional power relative to the dioptric power provided by the aperture
Data Source
AI summary
A spectacle lens design includes an aperture and at least two ring-shaped focusing structures surrounding the aperture. The aperture has a dioptric power, and the ring-shaped focusing structures surrounding the aperture provide an additional power relative to the dioptric power of the aperture. A ring-shaped diffuser is arranged between neighboring ring-shaped focusing structures. Neighboring ring-shaped focusing structures can adjoin each other with a ring-shaped contact line between them forming the ring-shaped diffuser. Neighboring ring-shaped focusing structures can also be arranged at a distance to each other and at least one of the ring-shaped focusing structures provides a ring shaped focal line. Neighboring ring-shaped focusing structures can also be arranged at a distance to each other and at least one of the ring-shaped focusing structures consists of lenslets that adjoin each other so as to form a ring of lenslets and provides a plurality of foci along a ring shaped line.