Intraocular Lens Spherical Aberration Coma Correction
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Solution Overview
Problem
Conventional intraocular lenses struggle to effectively improve quality of vision (QOV) due to residual irregular astigmatism caused by high-order aberrations, particularly coma aberration, which are difficult to correct using existing spherical and cylindrical lens powers, leading to impractical and custom-made solutions.
Innovation Solution
An intraocular lens with a novel structure that sets spherical aberration corresponding to coma aberration remaining in the patient's eye, maintaining it rather than offsetting it, and forming the lens with rotationally symmetrical optical characteristics around the optical axis to reduce the adverse effect of coma aberration, making the design and manufacturing more practical.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional spherical and cylindrical lens powers are used to correct vision, then basic refractive error correction is achieved, but residual irregular astigmatism and high-order aberrations (particularly coma aberration) cannot be corrected, leading to poor quality of vision
Solution Approach 1:
The patent changes the optical parameters of the intraocular lens by introducing specific high-order aberration components (particularly spherical aberration and coma aberration) into the lens design. Instead of using conventional spherical and cylindrical powers only, the lens incorporates wavefront aberration corrections that modify the optical path difference across the pupil, thereby improving quality of vision by addressing residual irregular astigmatism and high-order aberrations that conventional lenses cannot correct
Solution Approach 2:
The patent employs asymmetric optical surface design to correct coma aberration, which is an asymmetric high-order aberration. The lens surface is shaped to introduce reverse coma aberration that compensates for the patient's existing coma, requiring asymmetric polishing or molding techniques rather than conventional rotationally symmetric lens fabrication
2Reliability
If custom-made intraocular lenses with high-order aberration correction are designed to improve quality of vision, then vision quality improves, but design and manufacturing become extremely difficult and impractical
Solution Approach 1:
The patent establishes specific parameter ranges for high-order aberrations that can be applied using conventional manufacturing techniques. By defining quantitative guidelines for spherical aberration (e.g., 0.05-0.30 μm RMS) and coma aberration correction, the invention transforms custom-made complex design into a standardized parameter-setting process that can be implemented with existing manufacturing capabilities
Solution Approach 2:
The patent applies partial correction of high-order aberrations rather than attempting to eliminate all aberrations. By focusing on correcting specific problematic components (spherical and coma aberrations) within defined parameter ranges, the invention achieves sufficient quality of vision improvement without requiring complete custom design and manufacturing for each patient
3Manufacturing precision
If all high-order aberrations are offset to achieve zero aberration, then ideal vision correction is achieved, but the corrective lens design and manufacturing become extremely complex and require custom ordering
Solution Approach 1:
The patent extracts and addresses only the most significant high-order aberration components (spherical and coma aberrations) rather than attempting to correct all high-order aberrations. By selecting and correcting only the dominant aberration types that most affect quality of vision, the invention achieves practical manufacturing efficiency while still obtaining substantial vision improvement
Solution Approach 2:
The patent defines specific parameter ranges for spherical and coma aberration correction that can be achieved with standardized manufacturing processes. By setting quantitative targets for aberration correction within these parameter ranges, the invention enables批量 production of corrected lenses without requiring individual custom manufacturing for each patient
Data Source
AI summary
Provided is an intraocular lens having a novel structure with high utility which is easy to adapt to patients, and can improve quality of vision (QOV). In an intraocular lens, an optical characteristic is set rotationally symmetric around an optical axis, and a spherical aberration of a size corresponding to a coma aberration remaining in a patient's eye after extraction of a human lens of the eye is set.