Eye care practitioners often observe the deterioration of vision in patients with advancing age. Vision can be decreased with age due to a wide variety of ophthalmic, neurological and other pathologies. Many of these visually impaired individuals can experience complex visual hallucinations, a phenomenon known as Charles Bonnet syndrome (CBS). Eye care practitioners should be aware of the signs and symptoms of CBS, as it is often underdiagnosed in clinical practice and remains underpublicized in the literature. A visual illusion is an altered perception of a viewed object, such as mistaking a rope for a snake, or polka dots on a dress that are seen as insects. Palinopsia is a persistent or recurrent perception of visual images after they have been removed from view as seen in a blind field of vision. Palinopsia is also known as visual perseveration. A visual hallucination is a visual experience that is based on endogenous neural activity rather than on exogenous, viewed objects. It is the subjective experience of a visual phenomenon without objective stimuli present in the environment. Hallucinations can involve other sensory organs, such as hearing. A similar term, pseudo-hallucination, has been suggested for the phenomenon where the subject is aware of the unreality of the sensory experience.
Murry Westberg, BS; Leonid Skorin, Jr., OD, DO, FAAO
Company: Mediconcepts, Inc
CE Credits: 1
CE Format: PDF
COPE ID: 12405-NO