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Related Concept Videos

Visual Agnosia01:12

Visual Agnosia

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Visual agnosia is a condition characterized by the inability to recognize visually presented objects despite having normal vision. For instance, a person with visual agnosia can describe the shape and color of an object but cannot identify or name it. This impairment does not affect their visual field, acuity, color vision, brightness discrimination, language, or memory. An example of this condition in a social setting is someone at a dinner party asking for "that silver thing with a round...
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Updated: Mar 2, 2026

A Standardized Obstacle Course for Assessment of Visual Function in Ultra Low Vision and Artificial Vision
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Rethinking ADA signage standards for low-vision accessibility.

Aries Arditi1

  • 1Visibility Metrics LLC, Chappaqua, New York, USA.

Journal of Vision
|May 17, 2017
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Summary
This summary is machine-generated.

Current accessibility standards for buildings fall short for individuals with low vision. New standards should focus on legible sign viewing distances and consistent sign placement for better wayfinding.

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Area of Science:

  • Architecture
  • Accessibility Design
  • Human Factors

Background:

  • The Americans With Disabilities Act (ADA) and International Code Council (ICC) standards guide accessible building design in the U.S.
  • Existing standards ensure basic accessibility for the blind but are insufficient for individuals with low vision.

Purpose of the Study:

  • To critique current ADA and ICC standards for visual accessibility.
  • To propose improved standards for low-vision accessibility in building signage.

Main Methods:

  • Critique of existing standards' evidence base and effectiveness.
  • Proposal of new metrics for sign legibility and placement.

Main Results:

  • Current standards lack sufficient evidence and do not adequately address low-vision needs.
  • Mandating stricter physical features (e.g., letter size, contrast) does not guarantee visual accessibility.

Conclusions:

  • Accessibility standards should define sign legibility by viewing distance, not just physical features.
  • Consistent and approachable placement of directional signs is crucial for wayfinding for those with low vision.