thumb A<unk>  is the phenomenon of seeing light without light entering the eye. The word<unk>  comes from the Greek words phos (light) and phainein (to show).<unk> s that are induced by movement or sound may be associated with optic neuritis.<unk> s can be induced by mechanical, electrical, or magnetic stimulation of the retina or visual cortex, or by random firing of cells in the visual system.<unk> s have also been reported by meditators (called nimitta), people who endure long periods without visual stimulation (the prisoner's cinema), or those who ingest psychedelic drugs.
Phosphene
Magnetophosphene
Theobromine
Toxaphene
Desmethylchlorotrianisene
Chlorotrianisene
Menthol
Esthiomene