Optical effects of UV-A and UV-B radiation on the cultured bovine lens.

Abstract:

:The effects of repeated exposures to UV-A (335 nm) and UV-B (305 nm) radiation on the crystalline lens were studied by treating cultured bovine lenses daily or weekly. The effects of irradiation on lens optical quality were monitored using an automated scanning laser system that records both relative transmittance and focal length across the lens. Relatively low radiant exposures of UV-B were used (0.06, 0.03, 0.01 J/cm2) compared to UV-A (1.44 J/cm2). In total, 38 treated lenses and 32 controls were cultured for times ranging from 400-1000 hours. Results indicate that this range of UV-B exposure may represent the threshold for in vitro UV-B induced opacification. Lenses treated weekly with 0.06 J/cm2 UV-B showed a significant decrease in transmittance compared to controls 69 hours after the first treatment and an increase in focal length variability. The ability of the lens to repair itself, as found in a previous single dose study, was absent after repeated doses. Lenses exposed daily to 0.03 and 0.01 J/cm2 UV-B showed no significant change in transmittance or focal length variability compared to controls. Daily exposure to 1.44 J/cm2 UV-A resulted in no significant change in transmittance or focal length variability compared to controls.

journal_name

Curr Eye Res

journal_title

Current eye research

authors

Stuart DD,Cullen AP,Sivak JG,Doughty MJ

doi

10.3109/02713689409167301

subject

Has Abstract

pub_date

1994-05-01 00:00:00

pages

371-6

issue

5

eissn

0271-3683

issn

1460-2202

journal_volume

13

pub_type

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