Visual perceptual abnormalities: hallucinations and illusions.

Area of Science:

• Neurology
• Psychiatry

Background:

• Visual perceptual abnormalities present diverse diagnostic challenges.
• These abnormalities can originate from both psychiatric and neurological conditions.

Purpose of the Study:

• To review the differential diagnosis of visual perceptual abnormalities.
• To provide a practical approach for neurologists managing these symptoms.

Main Methods:

• Review of psychiatric etiologies (mania, depression, substance dependence, schizophrenia).
• Review of neurological causes (migraine, epilepsy, delirium, dementia, tumor, stroke).
• Discussion of specific phenomena like palinopsia, oscillopsia, dysmetropsia, and polyopia.

Main Results:

• Identifies a broad range of psychiatric and neurological causes for visual perceptual disturbances.
• Highlights specific visual phenomena requiring differential diagnosis.
• Emphasizes the utility of a systematic diagnostic strategy.

Conclusions:

• Accurate diagnosis of visual perceptual abnormalities requires considering both psychiatric and neurological factors.
• A structured approach facilitates focused evaluation and treatment planning.
• This review offers practical guidance for neurologists encountering these clinical symptoms.