title: Fresnel prisms for field enhancement of patients with constricted or hemianopic visual fields.
abstract: The concept of visual field enhancement is to increase the effect of the patient's habitual scanning skills by displacing peripheral images toward the residual field and mid-line. This reduces the extent of ocular and head rotation by patients with severely restricted and hemianopic visual fields. High power fresnel press-on prisms are used to effect the image displacement. This paper describes a technique that we believe to be less empirical and more reproducible than previously described in the literature.
authors.affiliation: Eastern Blind Rehabilitation Center, VA Medical Center, West Haven, CT 06516.
authors.forename: R R
authors.initials: RR
authors.lastname: Perlin
authors.forename: J
authors.initials: J
authors.lastname: Dziadul
mesh_terms: D005139:Eyeglasses; D006423:Hemianopsia / Q000628:therapy*; D006801:Humans; D008722:Methods; D055095:Optics and Photonics; D010353:Patient Education as Topic; D014794:Visual Fields