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Visual Agnosia

Visual Agnosia

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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Related Experiment Video

Updated: Jun 18, 2025

A Standardized Obstacle Course for Assessment of Visual Function in Ultra Low Vision and Artificial Vision

A Standardized Obstacle Course for Assessment of Visual Function in Ultra Low Vision and Artificial Vision

Published on: February 11, 2014

A Technology Aid to Help People with Blindness and Moderate Intellectual Disability Retrieve Common Objects from

Chiara Filippini¹, Giulio E Lancioni¹, Gloria Alberti¹

¹Lega F. D'Oro Research Center, 60027 Osimo, Italy.

Sensors (Basel, Switzerland)

|July 27, 2024

Summary

A new radio frequency identification (RFID) system helps individuals with blindness and intellectual disability locate and retrieve everyday items. Participants successfully used the technology, preferring it over other methods.

Keywords:

blindness intellectual disability object retrieval smartphone tag reader tags technology

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Last Updated: Jun 18, 2025

A Standardized Obstacle Course for Assessment of Visual Function in Ultra Low Vision and Artificial Vision

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Published on: June 1, 2015

Area of Science:

Assistive Technology
Human-Computer Interaction
Disability Studies

Background:

Individuals with blindness and intellectual disability often face challenges in object retrieval from storage.
Daily activities requiring object identification and retrieval can be significantly impacted.

Purpose of the Study:

To evaluate a novel technological system designed to aid individuals with blindness and intellectual disability in object retrieval.
To assess the system's effectiveness in improving task performance for three participants.

Main Methods:

A system utilizing radio frequency identification (RFID) tags, a smartphone, and a tag reader was implemented.
Participants were guided through object searching and retrieval using location-specific feedback.
The system provided distinct alerts for incorrect storage unit, incorrect shelf, or correct location.

Main Results:

All participants successfully retrieved target objects using the RFID system.
Participants demonstrated a preference for the technological system compared to a control strategy.
System usability was confirmed by participants' independent operation and positive staff ratings.

Conclusions:

The preliminary findings indicate that this RFID-based system shows promise as a valuable support tool.
The technology may enhance independence and daily living skills for people with blindness and intellectual disability.