Eyeglass Lens Optimization for Binocular Vision
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional spectacle lenses often compromise on peripheral imaging errors to achieve optimal correction in central viewing areas, leading to poor binocular vision and intolerance due to asymmetrical changes in aberrations during eye movements, especially for individuals with different prescriptions for each eye.
Innovation Solution
A method for optimizing spectacle lenses that incorporates binocular calculations to minimize a target function combining monocular and binocular optical properties, ensuring symmetrical changes in aberrations during eye movements by weighting factors, thereby improving binocular vision and overall perceived quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If spectacle lenses are optimized for central viewing areas with minimal imaging errors, then central vision correction is improved, but peripheral imaging errors increase leading to poor binocular vision
Solution Approach 1:
The patent divides the lens optimization into separate monocular and binocular components. The monocular optimization addresses central vision correction for each eye independently, while the binocular optimization separately addresses the coordination between the two lenses. This segmentation allows each aspect to be optimized without compromising the other.
Solution Approach 2:
The patent combines monocular and binocular optimization into a unified target function that is minimized simultaneously. By merging the monocular target function (addressing central vision) and binocular target function (addressing coordination between lenses) with appropriate weighting factors, the solution achieves both central vision correction and binocular compatibility.
2Manufacturing precision
If lenses are manufactured to provide good correction of ametropia in main areas of use, then central viewing quality is improved, but imaging errors in peripheral areas increase leading to asymmetrical changes during eye movements
Solution Approach 1:
The patent performs preliminary monocular optimization to establish the base lens design with good ametropia correction. Then, as a preliminary step before final optimization, it introduces binocular coordination requirements that pre-adjust the lens parameters to account for how the two lenses will work together during eye movements.
Solution Approach 2:
The patent changes the optimization parameters by introducing binocular target functions that consider the coordination between the two lenses. By adjusting the weighting factors in the combined target function, the optimization process modifies lens parameters to achieve symmetrical changes in aberrations during eye movements, improving tolerability.
3Measurement precision
If different prescriptions are provided for right and left eyes, then individual vision correction is improved, but differences in aberration changes during eye movements increase leading to poor binocular visual impression
Solution Approach 1:
The patent applies local quality by allowing different optimization weights for the right and left lenses in the binocular target function. The weighting factors can be adjusted independently for each lens, enabling the optimization to account for individual prescription differences while still achieving coordinated performance between the two lenses during eye movements.
Data Source
Figure 1A~1B
Figure 2A~2B
Figure 3A~3B
AI summary
The invention relates to the optimizing or production of at least one first eyeglass for a pair of eyeglasses for use together with a second eyeglass of the pair of eyeglasses in eyeglasses for a certain situation of use, wherein a method according to the invention comprises a binocular calculating or optimization step of at least one surface of the first eyeglass such that a target function (A) is minimize, which is defined as the sum of at least one first monocular function (B) and a binocular function F bino having respective weight factors g (1) or g bino having a residual term (C), wherein the first monocular function (B) depends on the values of at least one first monocular optical property Mon ( m 1) at a plurality of assessment points i 1 of the first eyeglass, and wherein the binocular function F bino for a plurality of pairs (D) of one binocular assessment point (E) each of the first eyeglass and one corresponding binocular assessment point (F) of the second eyeglass in a certain use situation depends on the values of a second monocular optical property Mon ( b ) both at the binocular assessment point (E) of the first eyeglass and at the binocular assessment point (F) of the second eyeglass.