Klin Monbl Augenheilkd 1988; 192(5): 568-571
DOI: 10.1055/s-2008-1050180
© 1988 F. Enke Verlag Stuttgart

Fresnel-Prismen - ihr Stellenwert in der Rehabilitation homonymer Hemianopsien

Fresnel Prisms - Their Value in Hemianopic RehabilitationT. R. Hedges Jr. , M. D., J. Stunkard, O. D., A. Twer, M. D.
  • Pennsylvania Hospital and The University of Pennsylvania
    Medical School, Philadelphia, PA
Further Information

Publication History

Publication Date:
18 March 2008 (online)

Zusammenfassung

Die Autoren beschreiben ihre Erfahrungen im Gebrauch der Fresnel-Prismen bei 41 Patienten mit homonymer Hemianopsie. Die Prognose für die visuelle Verbesserung wird im Zusammenhang mit dem Gesichtsfelddefekt des Patienten diskutiert und an Hand von Fallbesprechungen demonstriert. Die technischen Aspekte der Fresnel-Prismen werden dargelegt.

Summary

The use of press-on Fresnel prisms is described as a simple inexpensive technique to rehabilitate patients with homonymous hemianopia. The optical principle of prismatic displacement from the blind to the seeing fields is detailed herein. Forty-one patients were evaluated over a 10 year period. Twenty per cent benefited from the prism. Many of those who found limited or little value from their use expressed appreciation that something had been tried in order to improve visual function. Those patients with good acuity and an otherwise normal neurological status are the best candidates. Proper motivation and instruction are essential.

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