Micro-incision IOL with Recessed Protrusions
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Solution Overview
Problem
Conventional intraocular lenses (IOLs) require large incisions for implantation, which increases surgical complexity, recovery time, and patient discomfort, whereas compact IOLs capable of insertion through micro-incisions are needed to reduce these issues.
Innovation Solution
The design includes a compact optic with soft and deformable haptics that can be folded or rolled for insertion through small incisions, featuring a diffractive surface and recesses with protrusions for secure attachment to the capsular bag, allowing the optic to be maintained under tension for structural integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If conventional IOL designs are used, then the IOL can be implanted in the eye, but the incision size must be large (3.0-12 mm) which increases surgical complexity and recovery time
Solution Approach 1:
The IOL is divided into separate functional components: a compact optic element and flexible haptic arms that can be independently inserted and assembled within the eye. This segmentation allows each component to be small enough for micro-incision insertion while maintaining the overall functionality of the complete IOL structure
Solution Approach 2:
The IOL components are designed to be nested or folded into a compact configuration for insertion through micro-incisions, then deployed to their functional shape inside the eye. The haptics can be folded back against the optic, and the entire assembly can be compressed into a small profile suitable for small incisions
2Length of moving object
If the IOL is made compact for micro-incision insertion, then incision size is reduced, but the IOL must be folded or rolled which may compromise structural integrity
Solution Approach 1:
The IOL haptics are constructed from flexible, thin-film materials that can be repeatedly folded and compressed without permanent deformation or structural failure. This flexibility allows the IOL to be compacted for micro-incision insertion while maintaining the integrity of the haptic structure for proper post-implantation function
Solution Approach 2:
The IOL is designed with dynamic characteristics that allow it to transition between compact and deployed states. The haptics possess elastic properties enabling them to be compressed during insertion and then spring back to their functional configuration inside the eye, maintaining structural integrity throughout the transformation
3Length of moving object
If the IOL optic is made thin for compact insertion, then the IOL profile is reduced for micro-incision insertion, but the optic may lack sufficient structural integrity
Solution Approach 1:
The optic is constructed using composite material structures that provide high strength-to-thickness ratios. These composite structures enable the optic to be extremely thin for compact insertion while maintaining sufficient structural integrity to withstand insertion forces and maintain proper optical function after deployment
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enables IOLs to be implanted through micro-incisions, reducing surgical complexity and recovery time, while maintaining optical functionality and structural integrity, thus enhancing patient safety and comfort.
Implementation Method 1
At least one of the surfaces may include a diffractive surface
Data Source
Figure 1
Figure 2A~2B
Figure 2C~3B
AI summary
An intraocular lens (200) that is capable of being inserted through a micro-incision includes an optic (205) having an anterior (207a) and a posterior (207b) surface and a plurality of projections (210a/b, 212a/ b, 215a/b, 217a/b) extending from the anterior and posterior surfaces. The anterior and posterior surfaces include a recess (211). The optic is implanted such that a rim of the capsulorhexis is disposed in the recess such that the plurality of projections grip the capsular bag (145).