Intraocular Lens Fixation via Scleral Tunnel Hooking
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Solution Overview
Problem
Existing methods for fixing intraocular lenses to the sclera without suturing lack sufficient development, particularly in ensuring stable and precise axial positioning, and there is a need for an intraocular lens design that can be reliably fixed to the sclera without requiring suturing techniques, especially for treatments involving the ciliary sulcus.
Innovation Solution
An intraocular lens with a support portion extending in a leg shape from the limbus, featuring a folding-back portion that is hooked to the sclera, allowing for secure fixation without suturing, and adjustable to fit within a tunnel-shaped hole in the sclera, ensuring stability and precise positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the support portion is designed with a folding-back portion that is hooked to the sclera, then the fixation reliability is improved, but the device complexity increases
Solution Approach 1:
The support portion is divided into distinct functional segments: a folding-back portion for engagement with the sclera and a lens-carrying portion. This segmentation allows each part to perform its specific function optimally while maintaining overall structural integrity and fixation reliability.
Solution Approach 2:
Instead of having the support portion extend directly from the lens, the folding-back portion is designed to bend back and hook onto the sclera from the opposite direction. This inverted configuration enables secure anchoring without requiring complex suturing mechanisms.
2Ease of operation
If the folding-back portion is made adjustable to fit within the tunnel-shaped hole, then the ease of operation is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The folding-back portion is designed with inherent flexibility and adjustability, allowing it to dynamically adapt to variations in tunnel-shaped hole dimensions. This dynamic characteristic enables easy insertion and positioning while maintaining secure fixation, reducing the need for extremely precise manufacturing tolerances.
3Ease of operation
If the support portion is inserted from the ciliary sulcus without suturing, then the ease of operation is improved, but the stability of the object's composition worsens
Solution Approach 1:
The folding-back portion is designed to self-engage with the sclera through its hooked configuration, providing automatic stabilization without requiring external suturing assistance. The structure itself performs the stabilization function that would otherwise require additional surgical steps.
Data Source
AI summary
Provided is an intraocular lens including a lens and a pair of right and left loop-shaped support portions, and a folding-back portion is provided in the front end of each support portion. A sclera tunnel is formed in the circumferential direction at a position of a depth corresponding to the half of the thickness of the sclera in two symmetrical positions with respect to the visual axis in a portion adjacent to a limbus of the sclera. The front end of the support portion is extracted from the ciliary sulcus and is inserted into the sclera tunnel, so that the intraocular lens is fixed into the eye. Furthermore, at that time, the folding-back portion is hooked to a certain portion inside the sclera tunnel, so that the support portion is strongly restrained inside the sclera tunnel. As a result, the intraocular lens is more reliably fixed.