Ophthalmic Lens Design With Measurement Uncertainty Compensation

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Solution Overview

Problem

Existing methods for determining ophthalmic lenses for vision correction are prone to inaccuracies due to reliance on manual measurements and operator variability, leading to potential poor adaptation and acceptance by the subject.

Innovation Solution

A method that involves measuring fitting and dioptric parameters, estimating the level of uncertainty based on the measurement process, and using this uncertainty to determine the optical features of the ophthalmic lens, thereby compensating for measurement errors and ensuring better adaptation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If manual measurement processes are used by eye care professionals, then the measurement process can be performed with standard equipment, but the measured values risk being inaccurate due to operator variability and alignment errors

Engineering Contradiction:

Improvemeasurement process simplicityVSAvoidfitting parameter accuracy

Core Design Contradiction:

Ease of manufactureVSMeasurement precision

Solution Approach 1:

The patent replaces manual mechanical measurement processes with an automated optical measurement system that uses image capture devices and computer processing to eliminate operator variability and alignment errors while maintaining ease of use

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The measurement system performs self-alignment and self-measurement functions through automated image capture and processing, eliminating the need for operator intervention in the actual measurement process while keeping the system easy to operate

Inventive Principle:

Principle #25Self-service

2Measurement precision

If automated measurement devices are used, then measurement precision can be improved, but the device complexity increases

Engineering Contradiction:

Improvefitting parameter accuracyVSAvoidmeasurement system complexity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The patent integrates multiple measurement functions (image capture, alignment detection, parameter calculation) into a single universal device that can perform all measurements through one integrated system, reducing the need for multiple separate complex devices

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The system uses digital image copying and processing to create virtual models of the patient's anatomy and lens parameters, allowing complex measurements to be performed through software processing rather than complex physical measurement apparatus

Inventive Principle:

Principle #26Copying

3Device complexity

If measurement uncertainty is not accounted for in lens design, then the lens design process is simpler, but the risk of fitting errors and poor patient acceptance increases

Engineering Contradiction:

Improvelens design complexityVSAvoidfitting accuracy

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The patent performs preliminary uncertainty analysis during the lens design phase, calculating measurement uncertainties before the lens is manufactured and incorporating compensation measures into the design itself, so that fitting errors are prevented rather than corrected later

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system modifies lens design parameters based on measured uncertainty levels, adjusting optical characteristics to compensate for expected measurement variations and ensure reliable fitting across different measurement conditions

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS12321042B2Method and device for determining at least an optical feature of a progressive lens to be placed in a frame for vision correction of a subject

Publication Date: 2025.06.03 ESSILOR INTERNATIONAL(COMPAGNIE GENERALE D OPTIQUE)

AI summary

The invention relates to a method for determining at least an optical feature of an ophthalmic lens to be placed in a frame for vision correction of a subject, comprising: a) measuring (100) a value of a fitting parameter linked to the subject and/or the frame or a value of a dioptric parameter of the subject, thanks to a measurement process, b) providing (200) a level of uncertainty of said value measured in step a) depending on said measurement process, c) determining (400; 510; 620; 640) said optical feature of said ophthalmic lens by taking into account said value measured in step a) and said level of uncertainty provided in step b).