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The 'Missing Half' Field Defect

James R. Keane, MD

Arch Ophthalmol. 1979;97(5):865-866.

Abstract
• Hysterical hemianopias are uncommon and usually occur in association with other lateralized complaints. The most frequent pattern consists of decreased vision in one eye, an ipsilateral hemianopia on testing the "affected" eye, full fields in the other eye, and a complete hemianopia toward the affected side on testing with both eyes open. The incompatibility of the monocular and binocular fields quickly demonstrates the functional nature of this alleged visual loss.

Author Affiliations
From the Department of Neurology, Los Angeles County-University of Southern California Medical Center, Los Angeles.

Footnotes
Accepted for publication Oct 16, 1978.

Reprint requests to 1200 N State St, Los Angeles, CA 90033 (Dr Keane).

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