Ophthalmic Lens Optical Function Symmetry
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Solution Overview
Problem
Existing methods for designing ophthalmic lenses often fail to optimize binocular vision, leading to suboptimal comfort and performance, as they calculate lenses separately for each eye without considering the binocular aspect, which is crucial for natural ocular behavior during daily tasks.
Innovation Solution
A method for determining target optical functions for a pair of ophthalmic lenses that generates symmetrical optical functions for both eyes by transforming and modifying optical criteria values based on prescription data from both eyes, ensuring improved binocular performance through a computer-implemented process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If lenses are calculated separately for each eye based on individual prescription data, then monocular optimization is achieved, but binocular vision performance deteriorates
Solution Approach 1:
The patent merges the separate lens calculation processes by transforming the first eye's target optical function to generate the second eye's target optical function. This combining approach ensures both lenses are optimized considering binocular vision requirements, resolving the contradiction between monocular optimization and binocular performance.
Solution Approach 2:
The patent introduces asymmetry handling through the transformation process that adapts the first eye's optical function to the second eye's specific prescription characteristics. This allows each eye to receive customized optimization while maintaining binocular coherence, addressing the contradiction between individual optimization and paired performance.
2Measurement precision
If the number of optical criteria N is increased to improve lens performance, then optical accuracy improves, but calculation time increases
Solution Approach 1:
The patent creates a universal transformation process that can handle multiple optical criteria simultaneously. By establishing a general transformation rule from the first eye's optical function to the second eye's, the system efficiently optimizes multiple criteria without requiring separate lengthy calculations for each criterion, thus improving accuracy while managing computation time.
Data Source
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AI summary
A method for determining target optical functions for a pair of ophthalmic lenses is provided, the method comprising steps of: - generating a first target optical function (OFT1) for a first lens of the pair based at least on data relating to a first eye, - generating a second target optical function (OFT2) for a second lens of the pair based at least on data relating to the first eye. This method makes it possible to obtain optical functions having improved symmetry. Thus, when using the target optical functions in an optical optimization method, lenses with improved binocular properties can be obtained. The comfort of the wearer of the pair of lenses is thus improved.