Pk. Verkasalo et al., Inverse association between breast cancer incidence and degree of visual impairment in Finland, BR J CANC, 80(9), 1999, pp. 1459-1460
A total of 10 935 women with visual impairment were identified from the Fin
nish Register of Visual impairment and followed up for cancer through the F
innish Cancer Registry for years 1983-1996, Breast cancer risk decreased by
degree of visual impairment (P for trend 0.04) which suggests a dose-respo
nse relationship between visible light and breast cancer risk.