Closed-eye hallucination

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 can be a form of phosphene. Some people report CEV under the influence of psychedelics; these are reportedly of a different nature than the "open-eye" hallucinations of the same compounds. Similar hallucinations that occur due to loss of vision are called visual release hallucinations.

"Visual snow" redirects here. For the neurological condition, see Visual snow syndrome. For the display of noise in an analog video signal, see Noise (video).
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