Two-Ring Haptic Intraocular Lens Capsule Separation
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Solution Overview
Problem
Current intraocular lenses face challenges such as astigmatism due to uneven corneal surfaces, increased risk of infection and retinal detachment from large incisions, and post-surgical complications like capsular fibrosis and Posterior Capsule Opacification, which affect refractive stability and visual acuity.
Innovation Solution
The development of haptic devices featuring a two-ring configuration with pillars and ribbons that maintain separation between the anterior and posterior capsule, allowing for optimal positioning and movement of the lens to prevent epithelial cell migration, enhance aqueous humor circulation, and reduce capsular fibrosis, while enabling insertion through smaller incisions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional single-ring haptic design is used, then device complexity is reduced, but capsular fibrosis and Posterior Capsule Opacification increase due to inadequate capsule separation
Solution Approach 1:
The haptic device is divided into two separate rings (anterior and posterior) instead of a single ring, with each ring serving distinct functions. The anterior ring contacts the anterior capsule to prevent epithelial cell migration, while the posterior ring contacts the posterior capsule to maintain separation and prevent opacification. This segmentation resolves the contradiction by improving capsular health through specialized functionality while accepting increased structural complexity.
2Ease of operation
If large incisions are made for lens insertion, then ease of operation is improved, but risk of infection and retinal detachment increases
Solution Approach 1:
The haptic system is segmented into two rings that can be positioned independently within the capsular bag, allowing the lens to be inserted through smaller incisions while maintaining proper positioning. The anterior and posterior rings work together to secure the lens without requiring large incisions, thus reducing infection risk while preserving ease of surgical implantation.
3Stability of the object's composition
If the lens is held firmly in place, then refractive stability is improved, but aqueous humor circulation is restricted
Solution Approach 1:
The two-ring haptic design segments the lens support system, with the anterior ring providing stable positioning for refractive stability and the posterior ring maintaining capsular separation to preserve aqueous humor circulation. The separation between rings creates space for fluid flow while the anterior ring ensures optical stability, resolving the contradiction between these two requirements.
4Reliability
If the anterior and posterior capsule are allowed to contact, then device complexity is reduced, but capsular fibrosis and adhesions increase
Solution Approach 1:
The haptic system uses two separate rings positioned at the anterior and posterior capsules to maintain permanent separation between the capsule surfaces. This prevents contact between anterior and posterior capsules, eliminating the cause of capsular fibrosis and adhesions. The segmented design accepts increased device complexity as necessary to achieve reliable capsular health outcomes.
Data Source
AI summary
A haptic for fixation to, and manufacture in conjunction with, an intraocular lens to be implanted in the natural lens capsule of the human eye is disclosed. The haptic secures the lens in an appropriate position within the natural capsule so as to provide optimal visual acuity through the aphakic lens. The haptic is designed to position the lens neutrally, anteriorly or posteriorly within the lens envelope. The haptic has an anterior retention ring and a posterior retention ring.