Hook-Portion Intraocular Lens for Ciliary Muscle Coupling
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Solution Overview
Problem
Intraocular lenses currently held by leg portions fixed outside the sclera do not effectively transmit relaxation/contraction movement of the ciliary muscle, limiting their ability to focus on visual targets.
Innovation Solution
An intraocularly-mounted object with a hook portion extending from the ciliary process, allowing direct transmission of ciliary muscle movement to the lens via a leg portion, enabling the lens to move in conjunction with ciliary muscle relaxation/contraction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the intraocular lens is held by leg portions fixed outside the sclera, then the lens can be securely positioned in the eye, but the relaxation/contraction movement of the ciliary muscle is hardly transmitted to the lens
Solution Approach 1:
The patent introduces a hook portion as an intermediary structure that connects the leg portion to the ciliary process. This hook portion acts as a mediator that transmits the relaxation/contraction movement of the ciliary muscle directly to the lens, while the leg portion maintains secure positioning outside the sclera. The intermediary structure enables both secure fixation and effective movement transmission simultaneously.
2Device complexity
If the lens moves indirectly via the capsules, then the lens can be positioned without direct ciliary muscle connection, but the focus adjustment response is delayed and less effective
Solution Approach 1:
The patent segments the connection structure into distinct functional components: the leg portion for secure positioning outside the sclera, the hook portion for direct connection to the ciliary process, and the lens. This segmentation allows each component to perform its specific function optimally - the hook portion provides direct mechanical coupling for rapid response, while the leg portion maintains stable positioning, resolving the contradiction between simple structure and fast response.
3Ease of operation
If the hook portion extends along the outer surface of the ciliary process, then direct transmission of ciliary muscle movement is achieved, but the structure becomes more complex
Solution Approach 1:
The hook portion is designed with dynamic characteristics that allow it to extend along the outer surface of the ciliary process and transmit movement effectively. The flexible or articulated nature of the hook portion enables it to adapt to the ciliary process geometry while maintaining direct mechanical coupling, achieving efficient movement transmission without excessive structural complexity.
Data Source
AI summary
A hook portion 4 is provided which is formed so as to extend from base portions 21a of the ciliary processes 21 along the outer surfaces of the ciliary processes 21 via anterior end portions 21b of the ciliary processes 21 to base portions 21c at the opposite side. A leg portion 3 extending from the hook portion 4 toward the visual axis C is connected to the hook portion 4, and a lens 2 to be mounted in the eye of the patient is supported by the leg portion 3. The lens 2 is held in the eye of the patient in a state where the hook portion 4 is hooked or fitted to the ciliary processes 21.