Adhesion Film Microstructure for Myopia Control
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Solution Overview
Problem
Existing spectacle lenses, particularly those designed to slow down myopia progression, are complex, expensive, and inflexible, leading to decreased wearing comfort and increased costs due to frequent prescription changes.
Innovation Solution
An adhesion film with a microstructure that provides an additional positive dioptric power in the peripheral region, while maintaining the original prescription power in the central region, is applied to spectacle lenses. This film is flexible enough to adapt to curved lens surfaces and is designed to prevent peripheral images from being focused behind the retina, thereby reducing the stimulus for eye length growth.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If special PALs or contact lenses with peripheral addition are used to slow down myopia progression, then the myopia progression is reduced, but device complexity and manufacturing cost increase significantly
Solution Approach 1:
The spectacle lens is divided into a central region and a peripheral region with different optical functions. The central region maintains standard optical power for clear vision, while the peripheral region incorporates a positive optical power component to create myopia control effect. This segmentation allows each region to perform its specific function independently without compromising overall lens performance.
Solution Approach 2:
Different optical properties are assigned to different regions of the lens. The central region has standard optical characteristics for clear foveal vision, while the peripheral region has enhanced positive optical power to achieve myopia control. This local differentiation ensures that myopia control measures do not interfere with central vision quality.
2Reliability
If bifocal or progressive spectacle lenses are used to image periphery in front of retina, then myopia progression is slowed, but cosmetic appearance and acceptance deteriorate
Solution Approach 1:
The positive optical power component is localized exclusively to the peripheral region of the lens, while the central region maintains standard optical properties. This ensures that the lens appearance remains similar to conventional spectacle lenses, improving cosmetic acceptance, while still achieving myopia control through the peripheral optical design.
3Ease of operation
If spectacle lens power is changed frequently to adapt to changing prescription, then visual comfort is maintained, but manufacturing effort and cost increase
Solution Approach 1:
The invention combines a standard spectacle lens with a peripheral myopia control component in a single integrated lens design. This merging allows the lens to maintain standard optical properties for clear vision while incorporating myopia control functionality, reducing the need for complete lens replacement when prescriptions change and lowering manufacturing complexity.
Solution Approach 2:
The spectacle lens is designed to perform multiple functions simultaneously: providing clear central vision through the central region and controlling myopia progression through the peripheral region. This multi-functionality allows a single lens design to address both visual comfort and myopia control needs, reducing the need for specialized lens replacements.
4Reliability
If contact lenses are used to achieve peripheral plus power, then myopia control effect is achieved, but handling and reliability are limited especially in young children
Solution Approach 1:
Instead of using contact lenses that require precise fitting and handling, the invention creates a spectacle lens that replicates the myopia control effect through its peripheral optical design. This copying approach achieves similar therapeutic benefits while using a more manageable and reliable delivery system for children.
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 adhesion film improves long-term wearing comfort and reduces the progression of myopia by attenuating the stimulus for eye length growth, while maintaining clear central vision and being cost-effective and adaptable to individual prescriptions.
Implementation Method 1
the microstructure in the peripheral region at least partially causes an additional positive dioptric power
Data Source
AI summary
An adhesion film includes an adhesion surface with which the adhesion film is arrangeable on a front or rear surface of the spectacle lens in order to adhesively stick there; and a functional surface opposite the adhesion surface with a central region and a peripheral region. The functional surface has a microstructure such that the microstructure in the peripheral region at least partially causes an additional positive dioptric power and/or a contrast reduction in relation to the central region.