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21 July 1994 Peripheral light focusing by the anterior segment
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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.
© (1994) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Anthony J. Maloof M.D., Arthur Ho, and Minas T. Coroneo "Peripheral light focusing by the anterior segment", Proc. SPIE 2134, Laser-Tissue Interaction V; and Ultraviolet Radiation Hazards, (21 July 1994); https://doi.org/10.1117/12.180816
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