APA Dictionary of Psychology

an experimental treatment for visual neglect that takes advantage of the sensorimotor adaptation that occurs when a person’s visual field is artificially shifted. During this intervention, the patient wears goggles fitted with prisms that shift the wearer’s vision to the unneglected side. After adapting to this shifted visual field while performing some perceptual motor tasks (e.g., pointing straight ahead), the patient removes the goggles, and a negative aftereffect occurs whereby the patient’s vision shifts to the opposite side, so the formerly neglected field is back within the patient’s normal visual field. The aftereffect is not permanent, but the treatment can be repeated as needed.