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Proceedings Paper

Reflectivity of the human cornea and its influence on the selection of a suitable light source for a low-cost tonometer
Author(s): Yanmei Han; Peter John Bryanston-Cross; Keith Shaw; Mark Hero
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Paper Abstract

This article introduces an experiment designed to investigate which wavelength of light is best reflected by the cornea. Results indicate that the human cornea reflects near-infrared or violet light more efficiently than it does bright visible light. Further, results indicate that at a wavelength of 580nm, the reflectivity of the cornea decreases to a minimum value of 37% given light incident on the cornea at an angle of 45°. A light source suitable for the detection of glaucoma has been selected based on these results, also taking into account the spectral response of a suitable photo-detector.

Paper Details

Date Published: 12 September 2002
PDF: 5 pages
Proc. SPIE 4916, Optics in Health Care and Biomedical Optics: Diagnostics and Treatment, (12 September 2002); doi: 10.1117/12.482991
Show Author Affiliations
Yanmei Han, Univ. of Warwick (United Kingdom)
Peter John Bryanston-Cross, Univ. of Warwick (United Kingdom)
Keith Shaw, Univ. of Warwick (United Kingdom)
Mark Hero, Coventry and Warwick Hospital (United Kingdom)


Published in SPIE Proceedings Vol. 4916:
Optics in Health Care and Biomedical Optics: Diagnostics and Treatment
Britton Chance; Mingzhe Chen; Gilwon Yoon, Editor(s)

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