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Closed-eye hallucinations and closed-eye visualizations (CEV) are hallucinations that occur when one's eyes are closed or when one is in a darkened room. They should not be confused with phosphenes, perceived light and shapes when pressure is applied to the eye's retina, or some other non-visual external cause stimulates the eye.
Bell's phenomenon (also known as the palpebral oculogyric reflex [1]) is a medical sign that allows observers to notice an upward and outward movement of the eye, when an attempt is made to close the eyes.
Example of a Mooney face, inverted (left) and right-side-up. The Mooney Face Test, developed by Craig M. Mooney, was first introduced in his 1957 article “Age in the development of closure ability in children.” [1] Participants in the test are shown series of black and white distorted photographs, presented in such a way that would require them to perform closure. [2]
Models based on this idea have been used to describe various visual perceptual functions, such as the perception of motion, the perception of depth, and figure-ground perception. [16] [17] The "wholly empirical theory of perception" is a related and newer approach that rationalizes visual perception without explicitly invoking Bayesian formalisms.
Visual release hallucinations, also known as Charles Bonnet syndrome or CBS, are a type of psychophysical visual disturbance in which a person with partial or severe ...
A familiar phenomenon and example for a physical visual illusion is when mountains appear to be much nearer in clear weather with low humidity than they are.This is because haze is a cue for depth perception, [7] signalling the distance of far-away objects (Aerial perspective).
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Gollin conducted four experiments. In experiment I, 53 children aged 30–65 months and a comparison group of 20 adults were recruited. The test consisted in a series of 11 objects [bell, bird, birthday cake, chair, cow, fish, goose, horse, table (viewed from above and from below), umbrella] each drawn five times (set I, II, III, IV and V) with black ink on a white 14 in × 9 in (360 mm × 230 ...