Contact Lens With Apertured Colored Portion For Eye Stability
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Solution Overview
Problem
Existing contact lens structures struggle to achieve desired positioning on the eye while ensuring safety and reliability, particularly in creating optical or aesthetic effects.
Innovation Solution
A method of forming a contact lens structure with a back surface shaped to match the eye's shape, ensuring rotational and translational stability, and incorporating a colored portion with an aperture between the back and front surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a contact lens structure is designed with a colored portion having an aperture to create optical or aesthetic effects, then the aesthetic function and optical effect are improved, but the risk of biocompatibility issues and foreign body rejection increases due to direct contact with the eye
Solution Approach 1:
The colored portion with the aperture is extracted from direct contact with the eye by positioning it in the front surface layer, separated from the ocular surface by the lens thickness. This allows the aesthetic and optical functions to be maintained while eliminating the harmful direct contact between the colored material and the eye.
Solution Approach 2:
The contact lens structure itself acts as an intermediary between the eye and the colored portion with aperture. The lens material and its thickness serve as a protective barrier, mediating the interaction so that the colored portion can provide aesthetic effects without directly contacting the eye, thus preventing biocompatibility issues.
2Stability of the object's composition
If the back surface of the contact lens is shaped to conform to the eye to ensure rotational and translational stability, then the positioning stability is improved, but the manufacturing complexity increases due to the need for precise shape matching
Solution Approach 1:
The back surface shape is predetermined and pre-formed during manufacturing to match specific eye surface geometries. By preparing the shaping data and manufacturing process in advance, the complex conformal shaping is accomplished during production rather than requiring complex adjustment mechanisms, thus achieving stability without excessive manufacturing complexity.
Solution Approach 2:
The back surface geometry parameters (curvature, asphericity, zone dimensions) are optimized and standardized to provide stable fit across different eyes. By establishing parameter ranges and design guidelines, the manufacturing process becomes more predictable and less complex while maintaining positioning stability.
3Adaptability or versatility
If the colored portion is positioned closer to the eye to enhance the aesthetic effect, then the visual appearance is improved, but the risk of direct contact and potential eye irritation increases
Solution Approach 1:
Instead of positioning the colored portion closer in the vertical dimension (which would increase contact risk), the aesthetic effect is enhanced by optimizing the horizontal distribution, aperture size, and color properties of the colored portion. The thickness of the lens material provides sufficient separation while the aesthetic impact is maintained through design optimization in other dimensions.
Data Source
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AI summary
The present invention relates to a method of forming a contact lens structure (1) is provided, the contact lens structure having a back surface (10) configured to, at least partly, be in contact with the eye (2) of a user when in use, and a front surface (20) opposite said back surface. The method comprises the steps of shaping the back surface (20) of the contact lens structure based on information of a shape of the eye of the user such that the contact lens structure (1) is rotationally and translationally stable when in use on the eye of the user; and providing a colored portion (30) in the contact lens structure (1) arranged between the back surface (10) and the front surface (20), wherein the colored portion (30) comprises a aperture (32). The invention further relates to a contact lens structure.