Contact Lens Shadow Effect Asymmetric Stabilization
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Solution Overview
Problem
Existing contact lenses fail to effectively maintain a cosmetic shadow effect on the eye, which enhances the appearance of the upper eyelid margin and eyelashes, as they lack a design that creates a convincing illusion of shadowing or fuller lashes.
Innovation Solution
The contact lens features a cosmetic pattern with a darkened peripheral portion, specifically an arcuate pattern in the iris zone, combined with a limbal ring and graduated coloring, to create a shadow effect by blending with the wearer's eyelid and lashes, enhancing the appearance of the eyelid margin and lashes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a cosmetic pattern with darkened peripheral portion is provided to create a shadow effect, then the visual enhancement of upper eyelid and lashes is improved, but the lens may rotate or shift from the desired position on the eye
Solution Approach 1:
The patent employs asymmetric stabilization zones positioned at non-symmetric locations relative to the lens center and the cosmetic pattern. This asymmetric configuration creates a unique fit between the stabilization zones and corresponding features on the eye, preventing lens rotation while maintaining the desired shadow effect orientation.
Solution Approach 2:
The patent implements localized stabilization zones with specific thickness variations at predetermined positions on the lens periphery. These localized modifications provide rotational stability without affecting the overall cosmetic pattern or shadow effect, as the stabilization features are confined to specific regions that do not interfere with the visual enhancement areas.
2Stability of the object's composition
If the lens periphery is thickened for stabilization, then the lens orientation is maintained, but the cosmetic pattern and shadow effect may be compromised
Solution Approach 1:
The patent divides the lens into distinct functional zones: a central optical zone containing the cosmetic pattern for shadow effect, and a peripheral zone containing stabilization zones with modified thickness. This segmentation allows each zone to perform its specific function independently, with the stabilization zones positioned in the periphery where they do not interfere with the cosmetic pattern in the central iris zone.
Solution Approach 2:
The patent adds a dimensional aspect to stabilization by creating thickness variations in the lens periphery rather than modifying the two-dimensional cosmetic pattern. The stabilization zones are formed by varying the third dimension (thickness) of the lens material, allowing rotational stability to be achieved without altering the visual appearance or shadow effect quality of the cosmetic pattern.
3Stability of the object's composition
If symmetric thin zones are used for dynamic stabilization, then lens movement is controlled, but the shadow effect orientation may not be precisely maintained
Solution Approach 1:
The patent employs asymmetric stabilization zones positioned at non-symmetric locations relative to the lens center and the cosmetic pattern. This asymmetric configuration creates a unique fit between the stabilization zones and corresponding features on the eye, preventing lens rotation while maintaining the desired shadow effect orientation.
Data Source
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AI summary
A contact lens with a central portion, an iris portion, and a peripheral portion disposed about the iris portion; wherein the iris portion contains an arcuate colored or tinted portion that provides a shadow effect; the peripheral portion can be colored white and can have a pattern that graduates to transparent towards the outer diameter of the lens.