Ophthalmic Lens Wavefront Aberration Correction
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Solution Overview
Problem
Current ophthalmic lenses are unable to effectively correct high-order wavefront aberrations without introducing significant low-order aberrations, limiting their ability to improve vision quality, as they are designed to only minimize low-order aberrations and lack the capability to account for the interaction between eye and lens aberrations across the lens aperture.
Innovation Solution
A method that combines the coefficients of low-order and high-order wavefront aberration polynomials of both the eye and the ophthalmic lens to determine a wavefront-optimized low-order vision correction, minimizing the net effect of combined aberrations and optimizing the distribution of optical powers across the lens aperture, using advanced mathematical optimization techniques and free-form surfacing methods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If ophthalmic lenses are designed to correct only low-order aberrations, then manufacturing and design simplicity is maintained, but vision quality cannot be improved by correcting high-order aberrations
Solution Approach 1:
The patent segments the aberration correction task into two parts: low-order aberrations corrected by traditional lens designs and high-order aberrations corrected by optimizing the lens wavefront profile. This segmentation allows the lens to address multiple aberration types without requiring completely new lens architectures, thereby improving correction precision while managing design complexity through modular optimization approaches
Solution Approach 2:
The patent changes the wavefront parameters of the ophthalmic lens to optimize correction of combined low-order and high-order aberrations. By adjusting wavefront coefficients and optimizing lens surface profiles based on measured eye aberrations, the system achieves improved vision quality through parameter optimization rather than fundamental design restructuring
2Manufacturing precision
If ophthalmic lenses attempt to correct high-order aberrations, then vision quality improvement is achieved, but significant low-order aberrations are introduced
Solution Approach 1:
The patent applies preliminary anti-action by pre-compensating for the low-order aberrations that will be introduced when correcting high-order aberrations. The optimization process calculates the expected low-order aberration introduction and counteracts it in advance through wavefront optimization, ensuring that the net effect maintains both high-order correction benefits and low-order aberration control
Solution Approach 2:
The patent optimizes wavefront parameters to balance high-order aberration correction with minimal low-order aberration introduction. By adjusting lens wavefront coefficients and surface profiles through mathematical optimization, the system achieves a compromise that corrects high-order aberrations while keeping introduced low-order aberrations within acceptable ranges
3Ease of operation
If traditional eyeglass prescriptions are used, then low-order aberrations are minimized, but high-order aberrations degrade vision quality
Solution Approach 1:
The patent applies preliminary action by measuring the patient's eye aberrations before lens fabrication and using these measurements to optimize the lens wavefront profile in advance. This preliminary characterization of individual eye aberrations allows the lens to be customized for optimal correction of both low-order and high-order aberrations, improving vision quality while maintaining a streamlined clinical workflow
Solution Approach 2:
The patent incorporates feedback from wavefront aberration measurements of the patient's eye into the lens design process. The measured aberrations provide feedback that drives the optimization of lens wavefront parameters, creating a closed-loop system where actual eye characteristics inform lens customization, thereby improving vision quality without significantly complicating the prescription process
4Manufacturing precision
If ophthalmic lenses with non-spherical surfaces are used, then certain aberrations are corrected, but high-order aberrations are produced by refraction through lens regions
Solution Approach 1:
The patent optimizes the wavefront parameters of non-spherical lens surfaces to minimize the generation of high-order aberrations during refraction. By carefully controlling surface profile parameters and wavefront coefficients, the system achieves aberration correction benefits from non-spherical surfaces while suppressing the unwanted high-order aberrations that such surfaces can generate
Solution Approach 2:
The patent applies dynamic optimization to lens surface profiles, where the surface parameters are adjusted and optimized based on the specific aberration characteristics of the patient's eye. This dynamic approach allows the lens to adapt its surface characteristics to correct aberrations effectively while minimizing the generation of secondary high-order aberrations through optimized refraction geometry
Data Source
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AI summary
The current invention is directed to a method (36) for designing an ophthalmic lens element (24), the method (36) comprising the steps of determining (38) a wavefront aberration of an eye (26) in a reference plane (28), wherein the wavefront aberration of the eye (26) can be described by a first series of polynomials of ascending order up to a first specific order and corresponding first coefficients; and determining (40; 42) a first vision correction of a second specific order to obtain an adapted ophthalmic lens element (24); determining (44) at least one specified point (50) over an aperture (48) of the adapted ophthalmic lens element (24); determining (52) a high-order wavefront aberration in the reference plane (28) for each specified point (50) of the adapted ophthalmic lens element (24), wherein the high-order wavefront aberration can be described by a third series of polynomials of ascending order above the second specific order up to and including the first specific order and corresponding third coefficients; determining (54; 56; 58) a second vision correction of the second specific order for each of the specified points to obtain an optimized ophthalmic lens element (24) based on the first vision correction (40) up to and including the second specific order and based on combined first and third coefficients above the second specific order and up to and including the first specific order. Further, the current invention is directed to a method for manufacturing an ophthalmic lens element, a computer program product and a system for carrying out the methods.