enow.com Web Search

Search results

  1. Results from the WOW.Com Content Network
  2. Closed-eye hallucination - Wikipedia

    en.wikipedia.org/wiki/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 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.

  3. Adaptation (eye) - Wikipedia

    en.wikipedia.org/wiki/Adaptation_(eye)

    Like many predatory animals, humans can use their night vision to prey upon and ambush other animals without their awareness. Furthermore, in the event of an emergency situation occurring at night, humans can increase their chances of survival if they are able to perceive their surroundings and get to safety.

  4. Entoptic phenomenon - Wikipedia

    en.wikipedia.org/wiki/Entoptic_phenomenon

    A phosphene is the perception of light without light actually entering the eye, for instance caused by pressure applied to the closed eyes. A phenomenon that could be entoptical if the eyelashes are considered to be part of the eye is seeing light diffracted through the eyelashes.

  5. Phosphene - Wikipedia

    en.wikipedia.org/wiki/Phosphene

    An artist's representation of how some people may see phosphenes by retinal stimulation. A phosphene is the phenomenon of seeing light without light entering the eye. The word phosphene comes from the Greek words phos (light) and phainein (to show). Phosphenes that are induced by movement or sound may be associated with optic neuritis. [1] [2]

  6. 50 Of The Most Fascinating, Stunning And Dangerous Natural ...

    www.aol.com/100-most-incredible-stunning-strange...

    Image credits: Ross Burgener Meanwhile, for Dr. Brandon, the most beautiful natural phenomenon is the northern lights, whereas the most fascinating is the diel vertical migration.

  7. Visual perception - Wikipedia

    en.wikipedia.org/wiki/Visual_perception

    Much of the human cerebral cortex is involved in vision. There were two major ancient Greek schools, providing a primitive explanation of how vision works. The first was the "emission theory" of vision which maintained that vision occurs when rays emanate from the eyes and are intercepted by visual objects. If an object was seen directly it was ...

  8. Psychic staring effect - Wikipedia

    en.wikipedia.org/wiki/Psychic_staring_effect

    Compared to the eyes of other animals, the uniquely visible and well-defined sclera and iris of human eyes provides further evidence of its evolutionary importance for the species, and are thought to have developed as humans became more reliant upon complex communication for survival and reproductive success.

  9. Rapid eye movement sleep - Wikipedia

    en.wikipedia.org/wiki/Rapid_eye_movement_sleep

    Congenitally blind people, who do not typically have visual imagery in their dreams, still move their eyes in REM sleep. [16] An alternative explanation suggests that the functional purpose of REM sleep is for procedural memory processing, and the rapid eye movement is only a side effect of the brain processing the eye-related procedural memory.