Blindsight in real sight

Article Abstract:

Visual stimuli that are not seen by brain-damaged patients with visual field defects are detected, localized and identified by the patients anyway, similar to the visual behavior of blindsighted people. Forced-choice guessing was used to study the ability of residual visual processing of the patients and they had between an 70% to 80% accuracy rate despite the lack of visual perception. It could be possible that invisible targets direct eye movements and this helps in knowing target location.

Blindness, Brain damage

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Blindsight in normal subjects?

Article Abstract:

Blindsight refers to the condition in which people with a damaged visual cortex continue to experience residual visual sensitivity in a subjectively blind part of the visual field. Kolb and Braun reported that a parallel to this condition was observed in subjects without such impairment. However, a replication of their study failed to product similar results, leading to the conclusion that blindsight in dichoptic displays is hard to reproduce.

Visually disabled persons, Visually impaired persons

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Blindsight in monkeys

Article Abstract:

Investigation of blindsight, common in human beings with striate cortical destruction, in monkeys reveals that the monkeys could not identify visual stimulus as humans do. Humans with blindsight have exhibited sensitivity to brightness and darkness. This indicates that the human eye, though affected with blindsight, has neural cells capable of recognizing brightness and darkness, which are absent in the monkey's eye.

Monkeys, Agnosia

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