Hemianopic Fresnel prisms

J Clin Neuroophthalmol. 1982 Mar;2(1):19-22.


Patients with homonymous hemianopic visual field defects have been treated by using a 30-diopter Fresnel plastic paste-on prism on their glasses. A patient with a left homonymous hemianopia, for instance, can have a 30-diopter base left (i.e., base out) Fresnel prism placed on the temporal half of the left spectacle lens. The prism need be only on one lens. A small 1- to 1.5-mm portion can be cut out of the center to prevent diplopia. This device is widely available and easier to obtain than a hemianopic mirror on the frames. Use of this device is illustrated in the report.

Publication types

  • Case Reports

MeSH terms

  • Eyeglasses / standards*
  • Female
  • Hemianopsia / etiology
  • Hemianopsia / therapy*
  • Humans
  • Intracranial Arteriovenous Malformations / complications