title: An unusual application of prisms for field enhancement.
abstract: This case report describes an unusual procedure to alleviate the problem of walking for a patient who has a modified "doughnut" field or ring scotoma. The technique uses prisms for field enhancement to increase the peripheral field awareness for the purpose of mobility. The unconventional placement of the prisms on the carrier lens contributes to the unusual nature of this case.
authors.affiliation: Western New York Center for the Visually Impaired, Buffalo, NY 14223.
authors.forename: N J
authors.initials: NJ
authors.lastname: Weiss
mesh_terms: D001766:Blindness / Q000209:etiology / Q000628:therapy*; D001932:Brain Neoplasms / Q000150:complications; D005139:Eyeglasses; D006801:Humans; D008124:Locomotion; D008297:Male; D055095:Optics and Photonics; D012607:Scotoma / Q000209:etiology; D014794:Visual Fields