Custom Spectacle Lens Design for Higher Order Aberrations
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing spectacle ophthalmic lenses, particularly progressive lenses, fail to adequately address higher order aberrations, leading to residual astigmatism and discomfort for users, which affects visual acuity and adaptation to the lenses.
Innovation Solution
The method involves calculating a design for spectacle ophthalmic lenses using higher order aberration parameters such as HOA RMS, Strehl Ratio, and Modulation Transfer Function, to customize the management of residual astigmatism, optimizing the acuity/distortion compromise by selecting a 'hard' or 'soft' design based on the level of higher order aberrations, and incorporating an Eye-head coefficient for gaze direction adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If standard spectacle lenses are used to correct refractive errors, then low order aberrations are corrected, but higher order aberrations remain unaddressed causing residual astigmatism and visual discomfort
Solution Approach 1:
The patent applies parameter changes by measuring higher order aberrations using wavefront sensors and incorporating these measurements into lens design parameters. The lens design is customized based on individual higher order aberration profiles, transforming the standard correction approach into a personalized optimization process that addresses both low and higher order aberrations simultaneously
Solution Approach 2:
The patent implements preliminary action by measuring higher order aberrations before lens fabrication using aberrometers or wavefront sensors. This pre-measurement data is used to calculate and design customized lens parameters that proactively compensate for higher order aberrations, preventing visual discomfort before the user even wears the lenses
2Adaptability or versatility
If progressive lenses are designed with standard parameters, then basic vision correction is provided, but residual astigmatism causes discomfort and slows adaptation
Solution Approach 1:
The patent applies local quality by customizing lens parameters according to the specific higher order aberration profile of each user. Instead of using uniform design parameters, the lens design is locally optimized based on individual measurements, creating a personalized solution that addresses the unique optical characteristics of each user's eyes
Solution Approach 2:
The patent implements dynamics by making lens design parameters adaptive to individual user characteristics. The system dynamically adjusts lens parameters based on measured higher order aberrations, transforming static standard designs into dynamic customized solutions that respond to individual optical needs
3Reliability
If higher order aberrations are measured and used for customization, then visual performance is improved, but measurement complexity and device requirements increase
Solution Approach 1:
The patent applies mechanics substitution by replacing complex manual measurement and calculation methods with automated optical systems. Wavefront sensors and aberrometers automatically measure higher order aberrations, and computer algorithms automatically calculate optimized lens parameters, substituting manual processes with automated optical and computational systems
Solution Approach 2:
The patent implements self-service by enabling the measurement and calculation system to automatically determine optimal lens parameters without requiring extensive manual intervention. The system self-calibrates and processes measurements to generate customized lens designs, reducing the complexity burden on operators while maintaining high visual performance
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
A method for providing a spectacle ophthalmic lens to a wearer, the method comprising the following steps: - measuring the higher order aberrations in at least an eye of the wearer; - calculating a design of the spectacle ophthalmic lens or selecting a design in a spectacle ophthalmic lens design data base by adapting the management of residual astigmatism based on the measure of higher order aberrations in the eye of the wearer. A computer program product carrying out at least one of the steps.