Intraocular Lens Haptic Clip Structure for Reversible Repositioning
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Solution Overview
Problem
Existing intraocular lenses may be incorrectly positioned in the capsular bag after insertion, necessitating surgical intervention or replacement, particularly when toric lenses are misaligned, leading to imaging aberrations.
Innovation Solution
Intraocular lenses with a haptic element featuring a plastic bar and brace bars with specific transition temperatures, allowing position adjustment via electromagnetic radiation-induced deformation and tension management, enabling reversible repositioning without surgical instruments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a three-piece intraocular lens design is used with a separate capture ring, then the lens can be assembled after sterilization, but the number of components increases and assembly complexity increases
Solution Approach 1:
The patent merges the capture ring structure with the haptic arms by integrating the capture ring as part of the haptic assembly. The haptic arms are configured with capture rings that are formed as integral parts of the haptic structure, eliminating the need for a separate capture ring component. This reduces the total number of components while maintaining the ability to assemble the lens after sterilization.
2Reliability
If a three-piece intraocular lens design is used with a separate capture ring, then the lens can be assembled after sterilization, but the risk of losing the capture ring increases
Solution Approach 1:
The capture ring is merged with the haptic arms to form an integrated assembly. The haptic arms are configured with capture rings that are formed as integral parts of the haptic structure, eliminating the risk of the capture ring being lost during surgery. The integrated design ensures that the capture ring remains attached to the haptic arms throughout the implantation process.
3Device complexity
If the optic and haptics are connected by a rim, then the structure is simple, but the connection point becomes a stress concentration point
Solution Approach 1:
The patent segments the connection between the optic and haptics by introducing a capture ring structure that distributes the connection forces. Instead of a direct rim connection, the haptic arms are configured to engage with the optic through capture rings, which distribute the mechanical stresses across multiple engagement points rather than concentrating them at a single rim location.
4Device complexity
If the optic and haptics are connected by a rim, then the structure is simple, but disconnection may occur due to stress concentration
Solution Approach 1:
The connection is segmented into multiple engagement points through the capture ring structure. The haptic arms engage with the optic at distributed locations around the capture ring, preventing stress concentration at any single point and reducing the risk of disconnection.
Solution Approach 2:
The patent employs composite construction where the haptic arms and capture ring form an integrated assembly with the optic. This composite structure enhances the overall connection reliability by combining multiple materials and structural elements that work together to resist disconnection forces.
Data Source
Figure 1~2
Figure 3~4
Figure 5~7
AI summary
The invention relates to an intraocular lens (1) with an optical body (2) and a haptic element (3) having a clip (7), a plastic bar (4) that has a first longitudinal end (8) secured to the optical body (2) and a second longitudinal end (9) to which the clip (7) is secured and has a transition temperature higher than 40°C which is a glass transition temperature of the plastic bar (4) or a melting temperature of the plastic bar (4), and at least one brace bar (5, 6) having a first longitudinal end (10, 12) secured to the optical body (2) and a second longitudinal end (11, 13) to which the clip (7) is secured.