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Proceedings Paper

Peripheral light focusing by the anterior segment
Author(s): Anthony J. Maloof; Arthur Ho; Minas T. Coroneo
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Paper Abstract

Light incident at the temporal limbus of the peripheral anterior eye is focused onto the nasal limbus, the usual site of pterygium formation. Parameters which may contribute to observed individual variations in the degree of limbal light focusing were assessed. Computer assisted ray tracing techniques were applied to a human anterior segment model. We varied the angle of incident light ((Theta) , 5 to 18 degree(s) posterior to coronal plane), corneal radius of curvature (r(omicron ), 7.2 to 8.4 mm), and shape factor (p, 0.50 to 1.0) and calculated the effect in distal limbal intensity. The clinical observation of individual variations in the degree of limbal light focusing may be due to differences in corneal topography. Further study is required to determine whether individuals with corneas capable of developing intense limbal foci may be predisposed to developing pterygium.

Paper Details

Date Published: 21 July 1994
PDF: 6 pages
Proc. SPIE 2134, Laser-Tissue Interaction V; and Ultraviolet Radiation Hazards, (21 July 1994); doi: 10.1117/12.180816
Show Author Affiliations
Anthony J. Maloof, Univ. of New South Wales (Australia)
Arthur Ho, Univ. of New South Wales (Australia)
Minas T. Coroneo, Univ. of New South Wales (Australia)


Published in SPIE Proceedings Vol. 2134:
Laser-Tissue Interaction V; and Ultraviolet Radiation Hazards
Steven L. Jacques; David H. Sliney; Michael Belkin, Editor(s)

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