Foldable Multi-Component Intraocular Lens for Refractive Precision
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Solution Overview
Problem
Current refractive surgical procedures face limitations in post-operative refractive accuracy, trauma to the eye, and complexity in intraocular lens insertion and extraction, particularly in treating presbyopia and correcting optical aberrations, with existing methods requiring high surgical skill and resulting in induced astigmatism and image distortion.
Innovation Solution
A multi-component intraocular lens system with foldable components that allows for minimally invasive lens replacement and adjustment, enabling precise refractive customization and correction of optical aberrations through a simplified surgical procedure using a smaller incision and foldable design, allowing for independent adjustment of spherical and cylindrical optical elements without additional wound healing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional intraocular lens implantation is performed, then refractive correction is achieved, but post-operative refractive accuracy is insufficient (±0.75 to ±1.00 D range)
Solution Approach 1:
The intraocular lens is divided into multiple independent components (optical element, haptics, flange) that can be separately manufactured with high precision and assembled after implantation. This allows each component to be optimized and manufactured independently to achieve the desired ±0.25 D refractive accuracy while maintaining surgical simplicity.
2Object-affected harmful factors
If traditional surgical procedures are used, then refractive correction is achieved, but eye trauma is increased due to larger incisions
Solution Approach 1:
The optical element is designed as a foldable component that can be compressed into a compact form for insertion through small incisions, then unfolded and expanded to its functional shape within the eye. This flexible design minimizes incision size and associated eye trauma while maintaining the structural integrity needed for precise refractive correction.
3Manufacturing precision
If direct visualization of intraocular lens assembly is required, then insertion accuracy is improved, but surgical complexity and difficulty increase
Solution Approach 1:
The optical element is pre-assembled with the haptics and flange components outside the body in a controlled manufacturing environment, ensuring precise alignment and assembly. This preliminary assembly eliminates the need for complex intraocular assembly procedures and direct visualization during surgery, reducing surgical complexity while maintaining assembly precision.
4Adaptability or versatility
If conventional lens replacement is performed for presbyopia, then vision correction is achieved, but multiple surgeries are required as condition worsens
Solution Approach 1:
The intraocular lens system is designed with adjustable components that can be modified or replaced through minimal access procedures after the initial implantation. This dynamic design allows the lens parameters to be adjusted as the patient's presbyopic condition evolves, eliminating the need for multiple major replacement surgeries and reducing overall treatment time.
Data Source
AI summary
A multi-component intraocular lens implanted in an optical system of a human eye includes one or more removable components, each component being foldable. One component acts as a base lens, including a flange with an aperture. Another component acts as a mid lens, including a tab which engages the aperture. A third component acts as a top lens, which engages the mid lens. Because the lens components are foldable, they may be inserted into the eye using an incision smaller than the diameter of the unfolded lens. The removable components may be used to correct various medical conditions of the eye, as well as to improve and enhance vision, and for cosmetic purposes.