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Device for eliminating corneal light reflections during recording of lateral images with a slit lamp

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Abstract

Corneal reflections produce defects in photographic sections of the lens taken with a slit-lamp biomicroscope for computerized densitometric analysis of cataract opacity. A simple and workable, adjustable antireflection device was built that can be easily adapted to photographic slit lamps, a commom instrument in ophthalmology equipment. The slit lamp is a versatile tool for photographing structures in the anterior segment of the eye, particularly the lens. Corneal reflections are eliminated for angles between the light band and a photograph plane ranging from 20° to 90°, with the light band no greater than 0.5 mm and the corneal curvature about 7.6 to 7.9 mm. The device acts by blocking aberrant light rays from the light source that would otherwise be reflected by the mirrorlike surface of the cornea and enter the objective lens. Here we present a prototype designed for the Zeiss slit lamp.

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Authors and Affiliations

  1. Laboratorio di Bioingegneria, Clinica Oculistica Università di Modena, Modena, Italy

    E. Bocca, S. Fonda, D. Vecchi & P. Baraldi

  2. Student at Facoltà di Medicina, Università di Roma, Italy

    F. de Gregorio

Authors
  1. E. Bocca
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  2. S. Fonda
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  3. D. Vecchi
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  4. P. Baraldi
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  5. F. de Gregorio
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Bocca, E., Fonda, S., Vecchi, D. et al. Device for eliminating corneal light reflections during recording of lateral images with a slit lamp. Graefe's Arch Clin Exp Ophthalmol 224, 281–283 (1986). https://doi.org/10.1007/BF02143070

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  • DOI: https://doi.org/10.1007/BF02143070

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