Swivel Haptic Intraocular Lens for Capsulotomy Fixation
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Solution Overview
Problem
Current intraocular lenses (IOLs) face challenges in accurate positioning, decentration, capsulotomy tears, iris chaffing, pigment dispersion, and complex implantation procedures, leading to vision errors and user dissatisfaction.
Innovation Solution
A posterior chamber IOL with a circular optic and swivel haptics that can be rotated and fixed above the anterior capsule, providing stable centration and minimizing tilt, allowing for easy implantation through a standard injector and reducing the risk of capsular bag stretching or tearing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the IOL uses fixed haptics for capsulotomy fixation, then the implantation procedure is simpler, but the lens cannot adapt to varying capsulotomy sizes and shapes, leading to positioning errors
Solution Approach 1:
The patent applies the dynamics principle by designing haptics that can rotate or swivel at their connection points with the optic. This dynamic capability allows the haptics to adapt to different capsulotomy configurations (size, shape, orientation) while maintaining stable fixation. The rotational freedom enables the haptics to self-align with the capsulotomy opening, resolving the contradiction between procedural simplicity and adaptability.
2Stability of the object's composition
If the IOL uses larger size for stable fixation, then centration stability is improved, but the incision width required for implantation increases
Solution Approach 1:
The patent applies segmentation by dividing the IOL into modular components: the optic and separate haptics connected via rotation joints. This allows the haptics to be positioned optimally for stable fixation while keeping the main optic body compact. The segmented design enables stable centration without requiring an oversized lens, thus reducing the incision width needed for implantation.
3Reliability
If the IOL haptics are positioned to capture capsulotomy, then fixation stability is improved, but the risk of capsular bag stretching or tearing increases
Solution Approach 1:
The dynamic rotation capability of the haptics allows them to engage the capsulotomy edges gently without exerting excessive lateral force. The haptics can rotate into position rather than being forced into place, reducing stress on the capsular bag. This dynamic engagement mechanism maintains fixation stability while minimizing the risk of capsular stretching or tearing.
4Measurement precision
If the IOL uses complex design for accurate positioning, then positioning precision is improved, but the implantation procedure becomes more difficult
Solution Approach 1:
The patent uses dynamic haptic rotation as a self-aligning mechanism that automatically positions the lens correctly without requiring complex alignment procedures. The haptics naturally rotate to engage the capsulotomy opening, providing accurate positioning through passive mechanical adaptation rather than active surgical manipulation. This maintains positioning precision while keeping the implantation procedure relatively simple.
Data Source
AI summary
The present disclosure relates to a posterior chamber intraocular lens with swivel haptics for capsulotomy fixation in an eye. The posterior chamber intraocular lens includes a circular optic and at least one pair of swivel haptics. The circular optic is configured to be positioned within a capsular bag of the eye. The circular optic includes plurality of positioning holes on a periphery. The at least one pair of swivel haptics is positioned on the circular optic. The at least one pair of swivel haptics is configured to be rotated away from the circular optic and fixed above an anterior capsule of the eye.