Pseudophakic Contact Lens Haptics for Reversible Refractive Correction
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Solution Overview
Problem
Conventional methods for correcting residual refractive errors after intraocular lens implantation are invasive, unpredictable, and carry high surgical risks, with existing devices difficult to remove and prone to inducing visual aberrations.
Innovation Solution
An intraocular pseudophakic contact lens with haptics that secure to the anterior leaflet of the capsular wall, allowing for easy implantation and adjustment to correct residual refractive errors, featuring a multi-focal optical lens and haptic design that captures and secures to the intraocular lens.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional methods (IOL replacement, ablation surgery, piggyback IOL, ICL insertion) are used to correct residual refractive error, then refractive correction is achieved, but surgical risk and invasiveness increase
Solution Approach 1:
The pseudophakic contact lens combines multiple functions into a single device: it provides refractive correction for residual errors, can be adjusted post-implantation, and offers reversible correction without requiring additional invasive procedures. The lens works with existing IOLs and can correct various types of refractive errors through different lens designs (spherical, toric, multifocal).
Solution Approach 2:
The lens system allows dynamic adjustment of refractive correction after the initial IOL implantation. The contact lens can be exchanged or adjusted to fine-tune visual outcomes, providing a dynamic correction mechanism that adapts to the patient's specific needs without requiring repeat invasive surgery.
2Reliability
If invasive procedures are performed to correct residual refractive error, then refractive correction is achieved, but predictability of outcome decreases
Solution Approach 1:
The pseudophakic contact lens allows for preliminary testing and adjustment of refractive correction before finalizing the treatment plan. The lens can be trialed and adjusted to achieve the desired visual outcome, ensuring predictable results before permanent implantation or final correction is made.
3Reliability
If permanent refractive correction devices are implanted, then refractive error is corrected, but ease of removal and reversibility is reduced
Solution Approach 1:
The contact lens design provides a dynamic solution where the correction device can be easily removed, exchanged, or adjusted if needed. This reversibility allows patients to change their refractive correction needs over time without being locked into a permanent solution, while still providing stable correction when in place.
Data Source
AI summary
An apparatus includes an intraocular pseudophakic contact lens having an optical lens formed of a lens material and multiple haptics radially extending from a peripheral edge of the optical lens and configured to be inserted under an anterior leaflet of a capsular wall in an eye in order to capture and confine the haptics under the anterior leaflet. The haptics include the lens material. Anterior surfaces of the haptics are configured to contact an inner capsular wall surface at the anterior leaflet. The anterior surface of each haptic is continuous with an anterior surface of the optical lens. Posterior surfaces of the haptics include ridges configured to contact at least one edge of an artificial intraocular lens and capture the artificial intraocular lens between the ridges. At least a portion of the posterior surface of each haptic is positioned below a posterior surface of the optical lens. The optical lens is multi-focal.