Anti-Myopia Spectacles With Micro-Reticle Defocus Zones
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Solution Overview
Problem
Current anti-myopia progression spectacles have limited efficacy in controlling myopia progression in children, as they fail to consistently ensure dominating paracentral and/or peripheral retinal images are within focus or myopically defocused, leading to insufficient reduction in myopia progression.
Innovation Solution
Design of spectacle lenses with micro-reticles and corresponding micro-lenses distributed around the paracentral and/or peripheral regions, where micro-lenses refract light to form sharply focused or myopically defocused images on the retina, ensuring consistent focus or desired defocus within a range, thereby reducing accommodation demand and slowing myopia progression.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional anti-myopia spectacles are used, then myopia progression is reduced to some extent, but the efficacy is limited and inconsistent
Solution Approach 1:
The spectacle lens is divided into multiple functional zones: a central zone for distance vision and peripheral zones for myopic defocus. The lens incorporates multiple optical elements distributed across different regions to simultaneously provide distance correction and peripheral myopic defocus, ensuring consistent and reliable myopia progression control.
Solution Approach 2:
Different regions of the spectacle lens are designed with different optical properties. The central portion has optical power for distance vision correction, while the peripheral portions have optical power configured to produce myopic defocus. This local differentiation ensures that each zone performs its specific function optimally, improving overall efficacy.
2Reliability
If micro-reticles and micro-lenses are added to spectacle lenses, then paracentral and peripheral retinal images are consistently focused or defocused, but device complexity increases
Solution Approach 1:
The micro-reticles and micro-lenses are integrated directly into the spectacle lens structure, merging the correction function with the defocus function in a single unified lens. This integration ensures consistent image formation while avoiding the complexity of separate corrective devices.
Solution Approach 2:
The micro-reticles and micro-lenses are embedded within the spectacle lens material, creating a nested structure where smaller optical elements are contained within the larger lens matrix. This nesting approach maintains compactness and reduces overall device complexity while achieving multiple optical functions.
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 solution effectively reduces myopia progression by ensuring that paracentral and/or peripheral retinal images are consistently within focus or myopically defocused, thereby reducing eye elongation and improving clinical efficacy in myopia control for children.
Implementation Method 1
each micro-lens arranged in between its corresponding micro-reticle and the pupil of a wearer's eye. The micro-lens refracts the light rays from the micro-reticle such that when the micro-reticle is presented to the wearer's eye
Data Source
AI summary
Spectacles that control myopia progression have a central zone that achieves foveal vision correction and distributed micro-reticle(s) and corresponding micro-lens(es) around the paracentral and/or peripheral zone of the spectacle. Each micro-lens is disposed between its corresponding micro-reticle and the pupil of a wearer's eye. The micro-reticle(s) and micro-len(s) are integrated with the structure of the spectacle to partially block some of the paracentral and/or peripheral objects from surrounding optical environment. The rest of the paracentral and/or peripheral retinal areas are still available for a wearer's eye to sense the presence and movement of surrounding objects.