The eyes exposure outdoors to UV light depends on many factors. When the sun is overhead at noon, the level of UV exposure is 10 times greater than that at either 3 hours before or 3 hours after noon. An un-tanned person with fair skin would receive mild sunburn in 25 minutes at noon, but would have to lie in the sun for at least 2 hours to receive the same dose after 3:00 PM.
Cataract formation because of ultraviolet light damage to the lens has been addressed by a number of studies. The strongest association links UV-B exposure and cortical cataract formation in these studies. In contrast to cataract (where UV light exposure may be causative), Macular Degeneration does not seem to be related to UV exposure. However, macular degeneration seems to be related with "visible light" exposure (visible light forms the colors' spectrum). Advanced macular degeneration was more common in men exposed to increased levels of blue light, but not in those with increased levels of ultraviolet exposure.
Prevention of potential ocular and adnexal damage from ultraviolet radiation can be address in numbers of ways. First, and most obvious, is the simple avoidance of excessive exposure to UV radiation.