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A person experiencing heightened emotion, such as while walking alone on a dark night, may incorrectly perceive a patch of shadow as an attacker. [ 14 ] Many methamphetamine addicts report the appearance of "shadow people" after prolonged periods of sleep deprivation .
Shadows from cumulus clouds thick enough to block sunlight. A shadow is a dark area on a surface where light from a light source is blocked by an object. In contrast, shade occupies the three-dimensional volume behind an object with light in front of it.
Visual snow is a phenomenon where a person perceives visual disturbances, such as fine graininess or "static," in their field of vision. This can occur in low-light conditions, in the dark, or when the visual system amplifies light perception.
Satellite photograph of a mesa in the Cydonia region of Mars, often called the "Face on Mars" and cited as evidence of extraterrestrial habitation. Pareidolia (/ ˌ p ær ɪ ˈ d oʊ l i ə, ˌ p ɛər-/; [1] also US: / ˌ p ɛər aɪ-/) [2] is the tendency for perception to impose a meaningful interpretation on a nebulous stimulus, usually visual, so that one detects an object, pattern, or ...
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.
A phenomenon that could be entoptical if the eyelashes are considered to be part of the eye is seeing light diffracted through the eyelashes. The phenomenon appears as one or more light disks crossed by dark blurry lines (the shadows of the lashes), each having fringes of spectral colour.
Fear of the dark is a common fear or phobia among toddlers, children and, to a varying degree, adults. A fear of the dark does not always concern darkness itself; it can also be a fear of possible or imagined dangers concealed by darkness. Most toddlers and children outgrow it, but this fear persists for some with scotophobia and anxiety.
Scrying, also referred to as "seeing" or "peeping," is a practice rooted in divination and fortune-telling.It involves gazing into a medium, hoping to receive significant messages or visions that could offer personal guidance, prophecy, revelation, or inspiration. [1]