Ophthalmic Lens Personalization Using Accommodation Dynamics

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Solution Overview

Problem

Existing ophthalmic lenses do not adequately account for individual variability in accommodation dynamics, leading to discomfort when switching between far and near vision tasks.

Innovation Solution

A method for determining ophthalmic lenses based on personal accommodation dynamics parameters, including speed of accommodation, latency, and maximum amplitude, using an optometry device with photorefraction and display systems to tailor lens design for individual needs.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If a standard progressive lens design is used, then manufacturing and fitting are simplified, but individual accommodation dynamics are not accounted for leading to discomfort

Engineering Contradiction:

Improveease of lens fittingVSAvoidadaptability to individual accommodation dynamics

Core Design Contradiction:

Ease of operationVSAdaptability or versatility

Solution Approach 1:

The patent applies dynamics by making the lens design adaptive to individual accommodation characteristics. The method measures each user's accommodation amplitude and dynamics, then dynamically adjusts the progressive lens parameters (progression rate, boost zone characteristics) to match individual needs, transforming a static standard design into a dynamic personalized solution

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes key optical parameters of the progressive lens based on measured accommodation dynamics. Specifically, it adjusts the progression rate, boost zone power and position, and intermediate zone characteristics according to each user's accommodation amplitude and speed, thereby optimizing comfort while maintaining ease of fitting through systematic parameter optimization

Inventive Principle:

Principle #35Parameter changes

2Device complexity

If ophthalmic lenses are standardized for age groups, then device complexity is reduced, but individual variability in accommodation response is not addressed

Engineering Contradiction:

Improvecomplexity of lens designVSAvoidprecision of accommodation assessment

Core Design Contradiction:

Device complexityVSMeasurement precision

Solution Approach 1:

The patent segments the population further by introducing individual accommodation-based categorization within age groups. Instead of broad age-based segmentation, it divides users into categories based on measured accommodation amplitude and dynamics, allowing for more precise lens customization without excessive complexity

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent implements feedback by measuring accommodation dynamics through visual tasks and using these measurements to determine optimal lens parameters. The system continuously refines lens design based on measured accommodation response, ensuring precision while managing complexity through iterative optimization

Inventive Principle:

Principle #23Feedback

3Ease of operation

If accommodation effort is reduced through lens design, then comfort during vision switching is improved, but lens design becomes more complex requiring individual measurements

Engineering Contradiction:

Improvecomfort during vision switchingVSAvoidcomplexity of determination process

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The patent applies preliminary action by performing accommodation measurements and determining optimal lens parameters before the lens is manufactured. The boost zone and progression characteristics are pre-calculated based on measured accommodation dynamics, ensuring comfort during vision switching while streamlining the actual lens fitting process

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent makes the lens design dynamic by adjusting boost zone power and progression rate according to measured accommodation speed and amplitude. This dynamic customization optimizes comfort during vision transitions while managing determination complexity through systematic measurement and calculation protocols

Inventive Principle:

Principle #15Dynamics

Data Source

PatentUS12521007B2Methods for determining an ophthalmic lens and associated optometry device

Publication Date: 2026.01.13 ESSILOR INTERNATIONAL(COMPAGNIE GENERALE D OPTIQUE)

AI summary

A method for determining an ophthalmic lens intended to be worn by an individual is provided. The ophthalmic lens is adapted to provide to the individual a vision correction at, at least one, given vision gaze direction. The vision correction is based on wearer data including prescription data of the individual. The method includes the steps of: determining a parameter pertaining to the accommodative dynamics of an eye of the individual, and determining the ophthalmic lens based on the wearer data and on the parameter pertaining to the accommodative dynamics of an eye of the individual. A device is provided for determining the parameter pertaining to the accommodative dynamics of an eye of an individual in the method.