Modular Intraocular Lens Assembly for Post-Implant Lens Exchange
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Solution Overview
Problem
Existing intraocular lens (IOL) systems require manipulation of the capsular bag for adjustment or replacement, which risks damage and is complicated by tissue ingrowth over time, making it difficult to correct or modify optical results post-surgery.
Innovation Solution
A modular IOL system comprising an intraocular base and optic components that can be assembled and disassembled without manipulating the capsular bag, allowing for adjustment or exchange of the lens while the base remains in place, with features like actuatable tabs and recessed grooves for secure attachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a traditional IOL is implanted in the capsular bag, then the optical correction is provided, but the capsular bag must be manipulated for adjustment or replacement which risks damage and is complicated by tissue ingrowth
Solution Approach 1:
The IOL system is divided into two separate components: a base portion that remains implanted in the capsular bag and provides structural support, and a lens portion that can be independently attached or detached from the base. This segmentation allows the lens to be adjusted or replaced without manipulating or risking damage to the capsular bag, as only the lens portion needs to be accessed for changes.
2Duration of action of stationary object
If a traditional IOL is implanted in the capsular bag, then the optical correction is provided, but tissue ingrowth surrounds the haptics making removal difficult over time
Solution Approach 1:
By separating the lens portion from the base portion with haptics, the design allows the lens to be independently exchanged while the base remains permanently stable in the capsular bag. The base provides long-term anchoring without requiring removal, while the lens can be replaced as needed without dealing with tissue ingrowth around haptics.
Solution Approach 2:
The lens portion is extracted as a separate, removable component from the base portion. This extraction allows the lens to be taken out and replaced independently, while the base with haptics remains in place providing stable long-term support without needing to be manipulated for lens changes.
3Device complexity
If the IOL is designed as a single piece, then the structure is simple, but the lens cannot be adjusted or exchanged without removing the entire IOL
Solution Approach 1:
The IOL is segmented into a base portion and a lens portion that can be separately assembled. The base portion contains haptics for anchoring, while the lens portion can be attached to or detached from the base. This segmentation enables lens exchange capability while maintaining relative structural simplicity through modular design.
Solution Approach 2:
The connection between the lens portion and base portion is designed to be dynamically changeable - the lens can be attached to the base during implantation and potentially detached or exchanged later. This dynamic capability allows the system to transition from a fixed single-piece structure to an adjustable modular structure when needed.
Data Source
AI summary
Modular IOL systems including a base and a lens, wherein the lens includes fixed and actuatable tabs for connection to the base. The modular IOL allows for the lens to be adjusted or exchanged while leaving the base in place, either intra-operatively or post-operatively. Drug delivery capabilities and/or sensing capabilities may be incorporated into the base. Injector devices may be used to facilitate placement of the base and the lens sequentially or simultaneously into the eye.