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  • Title: Fresnel prisms for field enhancement of patients with constricted or hemianopic visual fields.
    Author: Perlin RR, Dziadul J.
    Journal: J Am Optom Assoc; 1991 Jan; 62(1):58-64. PubMed ID: 1813494.
    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.
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