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This study investigated poly(ADP‐ribose) polymerase‐1 (PARP‐1) activation in cultured human lens epithelial cells exposed to two levels of UVB light (312 nm peak wavelength), 0.014 and 0.14 J cm−2 (“low” and “high” dose, respectively). At the low dose, PARP‐1 and poly(ADP‐ribose) (PAR) polymers acted to repair DNA strand breaks rapidly with no subsequent major effects on either cell morphology or...