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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...

Neuroplasticity

Neuroplasticity

Neuroplasticity reflects the brain's remarkable capacity to adapt and evolve, responding dynamically to learning, experiences, or injury by reorganizing its neural circuitry. This reorganization involves creating new neural connections and refining old ones through a series of biological processes that contribute to the brain's lifelong development and adaptability.

Visual System

Visual System

Light enters the eye through the cornea, a transparent, dome-shaped surface covering the surface of the eyeball that helps to direct and focus incoming light. This light is then channeled toward the pupil, an adjustable opening whose size is controlled by the iris. The iris, a pigmented muscle, regulates the amount of light entering the eye by contracting or dilating the pupil, thereby ensuring optimal light levels for clear vision.
Once through the pupil, the light passes through the lens, a...

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Related Experiment Video

Updated: Mar 14, 2026

Development of a Gaze-Contingent Display Framework Designed for Perceptual and Oculomotor Research with Simulated Central Vision Loss

Development of a Gaze-Contingent Display Framework Designed for Perceptual and Oculomotor Research with Simulated Central Vision Loss

Published on: April 11, 2025

Neuro-visual rehabilitation.

Noa Raz¹, Netta Levin²

¹fMRI Lab, Neurology Department, Hadassah Hebrew University Medical Center, Jerusalem, Israel.

Journal of Neurology

|October 1, 2016

Summary

This summary is machine-generated.

Neuro-visual rehabilitation for brain damage is underutilized. Compensatory strategies show the most promise for improving vision in patients with visual field deficits.

Keywords:

Blindsight Compensatory therapy Hemianopsia Posterior cortical atrophy (PCA)Restorative therapy Substitutional prisms

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Last Updated: Mar 14, 2026

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Area of Science:

Neuroscience
Ophthalmology
Rehabilitation Medicine

Background:

Visual deficits affect nearly one-third of patients with brain damage.
Neuro-visual rehabilitation is often neglected compared to physical and speech therapies.
Dementia care typically overlooks progressive cortico-visual dysfunction.

Purpose of the Study:

To review different approaches to neuro-visual rehabilitation.
To focus on restorative and compensatory treatments for visual field deficits.
To evaluate therapeutic strategies for hemianopsia and posterior cortical atrophy.

Main Methods:

Review of restorative therapies aiming to restore vision in damaged areas.
Review of compensatory strategies enhancing the use of remaining visual fields.
Discussion of optical devices and utilized blind-sight phenomena.

Main Results:

Restorative therapies aim to reactivate inactive neurons.
Compensatory approaches focus on improving eye movements to mitigate visual loss.
Optical aids and blind-sight phenomena offer alternative visual bypass methods.

Conclusions:

Compensatory strategies demonstrate the most promising outcomes for neuro-visual rehabilitation.
Effective rehabilitation requires addressing specific deficits like hemianopsia and posterior cortical atrophy.
Further research into neuro-plasticity and tailored interventions is warranted.