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The ability of a blind person to sense the presence of a light source.


(Psychology) the ability to respond to visual stimuli without having any conscious visual experience; it can occur after some forms of brain damage



the ability of a blind person to sense accurately a light source or other visual stimulus.
References in periodicals archive ?
In the first part of the project we will employ behavioural as well as brain imaging methods to study the basic neural mechanisms of blindsight, that is, above chance visually guided behaviour in hemianopic patients in the absence of visual awareness.
Damage localised to the primary visual cortex produces a strange phenomenon known as cortical blindsight, (11) a condition which leaves the patient 'consciously' blind.
Aside from O'Callaghan's unfortunate overstating of the abilities of those with blindsight (86-87), Pacherie's discussion of Libet and Wegner's controversial interpretations of their own experimental findings will stoke the passions (102-5), whilst at the same time be useful for pure philosophy students as a starting point for understanding the reasoning skills needed to interpret psychological results.
This compelling and novel claim with respect to Gee's (adult) fiction is defended through the close textual analysis of The Plumb Trilogy (1995), Prowlers (1987), Going West (1993), Crime Story (1994), and Blindsight (2005).
For example, people with blindsight are unable to perceive certain regions of their visual field consciously.
Unconscious vision: New insight into the neuronal correlate of blindsight using diffusion tractography.
Each chapter describes a unique perceptual phenomenon: attention; automatic mechanisms, including aftereffects for color, motion, and tilt; singularity and multiplicity; forced seeing; looking without seeing; damage to brains, including visual agnosias and deficits such as scotomas, blindsight, and problems in allocating attention correctly, as in neglect, extinction, and Balint's syndrome; and evolutionary influences.
Some of these choices will surely be read a century from now--assuming anything is--but others are already forgotten, and the best sf novel of 2006, Peter Watts's astonishing Blindsight, isn't represented.
Sahraie has conducted extensive research on blindsight and residual visual processing after brain injury, and is highly regarded in the field.
Repression of unconscious information by conscious processing: Evidence from affective blindsight induced by transcranial magnetic stimulation.
Scientists investigating TN's blindsight ability constructed an obstacle course consisting of randomly arranged boxes.
The film, Blindsight, was released in 2006 and since then has won many awards for it depiction of the lives of six exceptional students in Tibet, as they joined world class blind mountain climber, Erik Weihenmayer, in an attempt to summit Lhakpa Ri, the 23,000 foot peak which rises spectacularly beside Mount Everest.