Intraocular Lens Form-Locking Haptic Connection
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Solution Overview
Problem
Conventional intraocular lenses face limitations due to the combination of different materials, which reduces flexibility and increases the size of the incision required for insertion, potentially leading to damage and limited lifespan.
Innovation Solution
An intraocular lens with a flexible optical element and haptic elements connected using a form-locking mechanism, allowing for smaller incisions and minimizing the impact on the lens's flexibility, while avoiding the use of adhesive materials to maintain durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If adhesive connection is used to attach haptic elements to the optical element, then the haptic elements are securely fixed, but the flexibility of the lens is reduced and the incision dimensions must be relatively large
Solution Approach 1:
The patent replaces the chemical adhesive connection system with a mechanical form-locking connection system. The haptic element includes a form-locking element that mechanically interlocks with the optical element through complementary geometric shapes, eliminating the need for adhesive while maintaining secure attachment. This mechanical connection preserves the flexibility of the flexible optical material because it allows for controlled movement and deformation without the rigid constraints of glued joints.
2Strength
If adhesive materials are used to connect haptic elements to the optical element, then the connection is fixed, but the lifespan of the lens is limited due to material compatibility issues
Solution Approach 1:
The patent applies homogeneity by ensuring that both the haptic element and the optical element are made from biocompatible materials that are compatible with each other and with the human eye environment. The form-locking connection eliminates the need for adhesive materials, reducing the number of different materials in contact with the eye and minimizing material compatibility issues. This homogeneous material selection and reduced material diversity extend the lifespan and reliability of the intraocular lens implant.
3Stability of the object's composition
If a fixed connection is used between haptic elements and optical element, then the connection is stable, but the lens flexibility is limited and folding is impeded
Solution Approach 1:
The patent implements a dynamic connection system through the form-locking element that provides stability when needed while allowing flexibility during insertion. The geometric interlocking mechanism maintains a stable connection during normal operation but permits controlled deformation and folding during the insertion process. This dynamic behavior resolves the contradiction between connection stability and lens foldability, as the connection adapts its rigidity based on the operational state of the lens.
Data Source
AI summary
An intraocular lens, instrument for insertion thereof, assembly of lens and instrument, and method for manufacture of such a lens. The lens includes an optical element of a flexible optical material and provided with a substantially circular periphery; and at least one haptic element provided with a haptic form-locking element. The optical element and the at least one haptic element with the haptic form-locking element are mutually connected by connection of the haptic element to the optical material.