Peripheral Microstructured Spectacle Lenses for Myopia Control
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Solution Overview
Problem
Conventional spectacle lenses for myopia correction suffer from decreasing wearing comfort due to myopia progression, leading to reduced tolerance and satisfaction, and existing optical aids are complex, costly, and inflexible, often impairing peripheral and foveal vision.
Innovation Solution
A spectacle lens design featuring a central main viewing region with constant optical power and a peripheral effect region with microstructures that create a higher optical power and/or contrast reduction, preventing mid-peripheral imaging behind the retina to attenuate the stimulus for eye length growth, thereby improving long-term wearing comfort and safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional spectacle lenses are used for myopia correction, then central vision is corrected, but wearing comfort decreases over time due to myopia progression
Solution Approach 1:
The patent applies local quality by implementing microstructures only in the peripheral region of the spectacle lens while maintaining the central region unchanged. This allows the peripheral area to have different optical properties (creating plus effect for myopia control) while the central area continues to provide accurate distance correction, thereby maintaining wearing comfort and visual quality over time
2Reliability
If optical aids with plus effect in periphery are used to slow myopia progression, then myopia progression is reduced, but peripheral vision quality and foveal vision are impaired
Solution Approach 1:
The patent segments the spectacle lens into distinct functional zones: a central main viewing region with constant optical power for sharp distance vision, and a peripheral effect region with microstructures that create plus effect. This segmentation allows each region to optimize its specific function without compromising the other, maintaining both myopia control and visual quality
3Reliability
If bifocal lenses or progressive lenses are used to create peripheral plus effect, then myopia progression is slowed, but cosmetic appearance and acceptance are reduced
Solution Approach 1:
The microstructures are confined to the peripheral region of the lens, leaving the central viewing area completely transparent and optically uniform. This ensures that when the wearer looks straight ahead through the center of the lens, no visual distortion or cosmetic indication of the myopia control technology is visible, maintaining natural appearance and high acceptance
4Reliability
If contact lenses with peripheral plus effect are used, then myopia progression is reduced, but handling and reliability are limited
Solution Approach 1:
The patent transfers the myopia control effect from contact lenses to spectacle lenses by using microstructures that replicate the peripheral plus effect. This copying approach allows the benefits of myopia control to be achieved through spectacle lenses, which are easier to handle, more reliable for children, and do not require the same level of user compliance as contact lenses
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 design effectively reduces myopia progression by maintaining central sharp vision and enhancing peripheral perception, ensuring long-term comfort and safety while avoiding the need for frequent prescription changes.
Implementation Method 1
the effect region has microstructures at least in part, said microstructures in the effect region bringing about an at least partially higher optical power than the optical power in the central main viewing region
Data Source
AI summary
A spectacle lens and to a method for producing such a lens, the spectacle lens comprising: a central main viewing region, with substantially constant optical power; an effect region around the central main viewing region, wherein the effect region has microstructures at least in part, said microstructures in the effect region bringing about an at least partially higher optical power than the optical power in the central main viewing region and/or at least partly a contrast reduction; and a peripheral region outside the effect region with a substantially constant optical power.