Visual Scotoma and Visual Afterimages: Some Evidence That the Perceived Visual Afterimage May Not Be a Purely Retinal Phenomenon: A Single Case Study

Abstract

Observations of the differential appearance and behaviour of a deliberately induced visual scotoma and a patterned visual afterimage are reported. Although a retinal scotoma behaves like a visual afterimage in some ways, there are sufficient differences to suggest that the perceived visual afterimage may not be just the simple consequence of prolonged retinal stimulation.