Functional Visual Field Analysis Across Postures and Tasks

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Solution Overview

Problem

Existing methods for measuring the useful field of view (UFOV) fail to account for the various postures and tasks an individual encounters in everyday life, leading to inadequate representation for determining optimal ophthalmic lenses and visual solutions.

Innovation Solution

A method to analyze the functional visual space by considering multiple postures and tasks, using devices to detect eye, head, and body orientations, and measuring visual fields with temporal components to determine a functional visual space that informs lens design, training programs, and ophthalmological treatments.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If visual field is measured under fixed sitting posture and fixation conditions, then measurement precision is improved, but adaptability to everyday life scenarios deteriorates

Engineering Contradiction:
Improvevisual field measurement precisionVSAvoidadaptability to everyday life scenarios
Core Design Contradiction:
Measurement precisionVSAdaptability or versatility

Solution Approach 1:

The patent applies dynamics by transitioning from fixed measurement conditions to dynamic measurement conditions. The system measures visual field under multiple varying postures (sitting, standing, walking) and fixation conditions, allowing the visual field representation to adapt to different real-life scenarios while maintaining measurement precision through controlled stimulus presentation in each condition.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The patent implements universality by creating a multi-functional measurement system that can assess visual field under various postures and tasks. The same measurement framework serves multiple purposes: quantifying visual field in sitting position, standing position, walking, and during specific tasks, thereby providing comprehensive data that represents both precision and adaptability.

Inventive Principle:
Principle #6Universality (Multi-functionality)

2Adaptability or versatility

If multiple postures and tasks are considered in visual field measurement, then adaptability to everyday life is improved, but device complexity increases

Engineering Contradiction:
Improverepresentation of visual field in everyday lifeVSAvoidcomplexity of measurement system
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent applies segmentation by dividing the complex measurement task into separate, manageable modules. Each module measures visual field under specific postures or tasks independently, with standardized stimulus presentation and response recording. This modular approach allows the system to handle multiple conditions without overwhelming complexity, as each segment can be optimized and processed separately.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The patent implements feedback mechanisms where the system monitors and records visual field measurements across different postures and tasks, then uses this information to generate comprehensive representations. The feedback loop allows the system to adapt stimulus presentation and measurement parameters based on previous measurements, managing complexity through intelligent control rather than hardware complexity.

Inventive Principle:
Principle #23Feedback

3Measurement precision

If fixed fixation conditions are used in measurement, then measurement precision is improved, but relevance to real-world visual needs deteriorates

Engineering Contradiction:
Improvevisual field measurement accuracyVSAvoidrelevance to real-world visual needs
Core Design Contradiction:
Measurement precisionVSReliability

Solution Approach 1:

The patent resolves this contradiction by making fixation conditions dynamic rather than fixed. The system measures visual field under multiple fixation conditions including fixational drift, saccades, and during specific tasks, while maintaining measurement precision through controlled stimulus presentation. This dynamic approach ensures the measurements reflect real-world visual needs while preserving accuracy through standardized measurement protocols.

Inventive Principle:
Principle #15Dynamics

Data Source

PatentEP3727128B1A method of analyzing a visual field of an individual
Publication Date: 2026.02.11 ESSILOR INTERNATIONAL(COMPAGNIE GENERALE D OPTIQUE)
  • EP3727128B1 patent drawingFigure 1~5

AI summary

A method of analyzing a visual field of an individual comprises the following steps: - measuring (S4) a first visual field (VF1) of said individual for a first set of oculo-postural parameters of said individual when said individual performs a first task; - measuring (S6) at least one additional visual field (VFi) of said individual for one additional set of said oculo-postural parameters of said individual when said individual performs an additional task; - determining (S8) a functional visual space based on said first visual field (VF1) and said at least one additional visual field (VFi), said functional visual space being an envelope of said first visual field and said at least one additional visual field. The additional task differs from said first task and/or said additional set of oculo-postural parameters differs from said first set of oculo-postural parameters. A corresponding ophthalmic lens is also proposed.