Puzzle-Constructed Intraocular Lens for Haptic-Free Implantation
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Solution Overview
Problem
Current intraocular lenses with small optical diameters require haptics for positioning, leading to potential misalignment and complications like dysphotopsia and posterior capsule opacification, and existing haptic-free lenses are complex in design or manufacturing.
Innovation Solution
A disc-shaped intraocular lens with a diameter of 8 mm or more, constructed from several prefabricated, shape-retaining molded parts that can be assembled in the eye, eliminating the need for haptics and allowing insertion through small incisions, with a through hole for aqueous humor flow and optional toothing elements for precise fitting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If a small-diameter optical component is used, then the lens can be implanted through a small incision, but the lens requires haptics for positioning which can cause misalignment and dysphotopsia
Solution Approach 1:
The lens body is divided into multiple separate molded parts that can be inserted independently through small incisions and then assembled together within the capsular bag to form a complete large-diameter lens, combining the advantages of small incision access with large-diameter stability
Solution Approach 2:
Multiple lens body parts are nested or stacked together to form the complete lens body, with each part being insertable through a small incision individually, then assembled within the capsular bag to achieve the final large-diameter structure
2Reliability
If a large-diameter lens body is used, then haptics are not needed for positioning, but the lens cannot be inserted through small incisions
Solution Approach 1:
The large-diameter lens body is segmented into multiple smaller molded parts that can pass through small incisions, which are then assembled together to reconstruct the full large-diameter structure within the capsular bag
Solution Approach 2:
The lens body parts are pre-formed as complete molded structures with their final shape and optical properties, allowing them to be assembled within the capsular bag to form the complete large-diameter lens without requiring further shaping or deformation
3Length of moving object
If the lens body is made from multiple separate parts, then it can be inserted through small incisions, but the assembly process becomes complex
Solution Approach 1:
The lens body parts are designed to nest or stack together in a predetermined sequence within the capsular bag, with each part having complementary geometries that guide proper assembly and reduce surgical complexity
Solution Approach 2:
Multiple lens body parts with identical or complementary optical properties are combined to form a complete lens, where the individual parts can be manufactured using standardized processes and assembled through a unified surgical technique
Data Source
Figure 1a~1b
Figure 2a~2b
Figure 3a~3b
AI summary
The invention relates to an intraocular lens (1) consisting solely of a disc-shaped lens element (2) which is formed as an optical unit of the intraocular lens (1) at least in some regions. The lens element (2) has a diameter (d) which is greater than or equal to 8 mm, and the lens body (2) is made of multiple parts and has a first prefabricated lens element part (5) and at least one second prefabricated lens element part (6), which is separate therefrom, said lens element parts forming the lens element (2) in the assembled state, wherein the first prefabricated lens element part (5) and the second prefabricated lens element part (6) are each a molded part which retains its respective shape prior to being assembled.