A tendency to sunburn after 0.5 h midday summer sun exposure increased risk for uveal melanoma (burn with tanning RR = 1.5, P = 0.02; burn with little tanning RR = 1.8, P < 0.001; burn with no tanning RR = 1.7, P = 0.002); as did exposure to UV or black lights (RR = 3.7, P= 0.003); and welding burn, sunburn of the eye, or snow blindness (RR = 7.2, P < 0.001). An association with uveal melanoma was also noted with an increasing number of large nevi (P= 0.04 for trend), although the individual risk