Intraocular pseudophakic contact lenses
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Solution Overview
Problem
Conventional methods for correcting residual refractive errors after intraocular lens implantation are invasive, risky, and unpredictable, often leading to surgical complications and visual aberrations.
Innovation Solution
Intraocular pseudophakic contact lenses with anchors that secure to the anterior surface of existing intraocular lenses, allowing for non-invasive correction of residual refractive errors and easy replacement or removal.
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 is placed on top of the existing intraocular lens, with the contact lens optically nested within the visual pathway defined by the IOL. The anchors of the contact lens are inserted through the IOL material to secure the combination, creating a nested structural relationship that enables correction without removing the original IOL.
Solution Approach 2:
The pseudophakic contact lens acts as an intermediary optical element between the existing IOL and the eye's refractive system. Rather than directly modifying the IOL or performing invasive procedures on the cornea, this intermediary lens provides the necessary refractive correction while being secured through the IOL material.
2Measurement precision
If intraocular lens is replaced to correct refractive error, then vision correction is achieved, but surgical complications risk increases
Solution Approach 1:
The pseudophakic contact lens is designed with anchors that can be inserted through the existing IOL before final positioning. This preliminary anchoring action secures the lens in place during insertion and allows for adjustment before permanent fixation, enabling precise refractive correction while avoiding the risks of IOL replacement surgery.
3Measurement precision
If ablation surgery is performed on cornea to correct residual refractive error, then vision correction is achieved, but side effects increase
Solution Approach 1:
The patent replaces the mechanical/chemical ablation process on the cornea with an optical solution - a pseudophakic contact lens that provides refractive correction through its lens design. This substitution eliminates the harmful thermal and mechanical effects of ablation surgery while achieving the same refractive correction goal.
4Measurement precision
If piggyback intraocular lens is inserted to correct refractive error, then vision correction is achieved, but predictability of final refractive outcome decreases
Solution Approach 1:
The pseudophakic contact lens is designed with specific local optical properties - including asymmetric anchor placement, customized lens curvature, and targeted refractive power distribution - that allow for precise control of the final refractive outcome. This local customization enables predictable correction compared to the more generic piggyback IOL approach.
5Measurement precision
If intracorneal lens is inserted to correct refractive error, then vision correction is achieved, but rejection rate increases
Solution Approach 1:
The pseudophakic contact lens replicates the refractive correction function of intracorneal lenses but places the optical element in a different location - on the anterior surface of the IOL rather than within the cornea. This copying of the correction function in a biocompatible location avoids the rejection issues associated with intracorneal implantation.
Data Source
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AI summary
Various intraocular pseudophakic contact lenses (100, 400, 800, 900, 1600, 1700, 1800, 1900, 2000) are disclosed. For example, an intraocular pseudophakic contact lens can include a first optical lens (102, 402, 802, 902, 1602, 1702, 1802, 1902, 2002, 2100, 2102, 2200, 2250, 2300, 2400) and multiple anchors (106a-106b, 406a-406b, 1500). The anchors are configured to be inserted through an anterior surface of an intraocular lens (1000) into lens material (1006) forming a second optical lens (1002) of the intraocular lens in order to secure the intraocular pseudophakic contact lens to the intraocular lens. The anchors can be configured to couple the intraocular pseudophakic contact lens to different types of intraocular lenses, including intraocular lenses not specifically designed to be coupled to or receive the intraocular pseudophakic contact lens. Different portions of the first optical lens have different refractive powers such that a first portion of the first optical lens has a first refractive power and a second portion of the first optical lens has a second refractive power different from the first refractive power.