Akademik
opti - pali
optical allachaesthesia
optical alloaesthesia
optical allochiria
optical hallucination
optical halo
optical illusion
optical paradox
optogeometric illusion
ordinal-linguistic personification
organic autorepresentation
organic hallucination
organic hallucinosis
organic twilight state
organization phase
organized hallucination
original afterimage
orthographic hallucination
oscillopsia
osis and haraldsson's definition of hallucinations
otic tinnitus
out-of-body experience
out-of-the-body experience
output model of hallucinatory activity
over-recruitment
PAD model