Ophthalmic Lens Evaluation Using Wearer-Specific Visual Performance Models
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Solution Overview
Problem
Current methods for evaluating ophthalmic lenses do not adequately consider factors that improve visual comfort or wearing satisfaction for individual wearers, leading to potential acuity loss exceeding sensitivity thresholds.
Innovation Solution
A method using computer means to evaluate ophthalmic lenses based on visual performance parameters, incorporating wearer-specific data, opto-geometrical features, and gaze directions, with a visual performance model to determine acuity loss and compare it against tolerance ranges, ensuring lenses meet specific comfort criteria.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional quality inspection methods are used to check ophthalmic lenses, then manufacturing speed and productivity are maintained, but visual comfort and wearing satisfaction for individual wearers are not adequately ensured
Solution Approach 1:
The patent applies preliminary action by performing visual performance simulations during the lens design and manufacturing phase. The computer implements wearer visual performance models that predict visual comfort outcomes before the lenses are delivered to wearers, allowing potential issues to be identified and corrected in advance rather than requiring post-delivery adjustments
Solution Approach 2:
The patent uses copying by creating virtual models and simulations of visual performance. Instead of physically testing each lens on every wearer, the system creates computational copies (simulations) that replicate the optical behavior and visual performance characteristics, enabling thorough evaluation without slowing down physical manufacturing
2Manufacturing precision
If ISO optical tolerances are met for ophthalmic lenses, then manufacturing precision is maintained, but acuity loss may still exceed sensitivity thresholds for some wearers
Solution Approach 1:
The patent applies parameter changes by moving from checking only compliance with ISO optical tolerances to evaluating actual visual performance parameters. The system calculates wearer-specific visual performance parameters such as visual acuity, contrast sensitivity, and field of view using computational models that incorporate individual wearer characteristics and lens opto-geometrical features
Solution Approach 2:
The patent replaces mechanical/physical measurement systems with computational modeling. Instead of relying solely on physical measurement of lens parameters, the system uses computer-based simulations that calculate visual performance outcomes by substituting physical testing with mathematical models of optical behavior and human visual response
3Reliability
If comprehensive wearer-specific evaluation is performed for each ophthalmic lens, then visual comfort is improved, but device complexity and measurement complexity increase
Solution Approach 1:
The patent applies universality by creating a multi-functional computational system that performs multiple evaluation tasks through integrated wearer visual performance models. The same computational framework evaluates various visual performance parameters (acuity, contrast sensitivity, distortion) across different gaze directions and wearing conditions, eliminating the need for separate specialized systems for each measurement
Solution Approach 2:
The patent uses an intermediary approach by introducing computational models as intermediaries between lens manufacturing and wearer evaluation. The wearer visual performance models act as intermediaries that translate lens opto-geometrical features into predicted visual performance outcomes, bridging the gap between manufacturing specifications and actual wearer experience without requiring direct physical testing
Data Source
AI summary
A method for evaluating an ophthalmic lens for a given wearer according to a visual performance parameter includes providing wearer's data for the given wearer. The method further includes providing a visual performance parameter tolerance range for the wearer. The method further includes providing an ophthalmic lens to be evaluated, the ophthalmic lens being characterized by opto-geometrical features. The method further includes computing a value of the visual performance parameter for the lens to be evaluated on the basis of a model. The method further includes evaluating the ophthalmic lens by comparing the computed value of the visual performance parameter with the visual performance parameter tolerance range.