(PSVP)
The expression positive spontaneous visual phenomenon is used as an umbrella term for *visual hallucinations that may occur in individuals with impaired vision. Using complexity as a guiding principle, the group of PSVP can be divided into *phosphenes, *photopsias, and *formed visual hallucinations.
References
Vaphiades, M.S. (2000). Disorders ofvisual integration. American Orthoptic Journal, 50, 101106.
Dictionary of Hallucinations. J.D. Blom. 2010.