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Updated: Aug 17, 2026

Characterization of Molecular Mechanisms of In vivo UVR Induced Cataract
Published on: November 28, 2012
The effect of exposure time on maximum acceptable dose for avoidance of ultraviolet radiation-induced cataract
Xiuqin Dong1, Per G Söderberg, Marcelo Ayala
1Department of Clinical Neuroscience, Karolinska Institutet, St. Erik's Eye Hospital, Stockholm, Sweden. xiuqin.dong@ste.ki.se
Abstract:
The effect of exposure time on maximum acceptable dose (MAD) for avoidance of ultraviolet radiation B (UVRB)-induced cataract was investigated. Sprague-Dawley rats were divided into 5 exposure time groups: 7.5, 15, 30, 60, and 120 min. Each exposure time group was divided into 5 dose subgroups: 0, 1, 2, 4, and 8 kJ/m2. The rats were unilaterally exposed to UVR around 300 nm. One week after the exposure, macroscopic structure was recorded and lens forward light scattering was measured. MAD for avoidance of UVRB-induced cataract was estimated based on the dose-response function. MAD for avoidance of UVRB-induced cataract for 7.5, 15, 30, 60, and 120 min exposures was estimated to be 2.0, 1.4, 1.9, 1.8 and 2.2 kJ/m2, respectively. In the exposure time domain 7.5-120 min, MAD for avoidance of UVRB-induced cataract depends on exposure time.
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