(I) Staring at the Sun without sunglasses hurts, which is
reason enough to avoid doing it. (II) Too little sunshine
leads to low vitamin D levels, which put you at higher
risk of certain cancers. (III) But direct exposure to the
ultraviolet radiation in intense sunlight can also damage
the eye and increase the likelihood of a cataract
developing. (IV) Cataracts affect the part of the eye that
focuses light – the lens – gradually clouding vision and
leading to blindness. (V) Surgery to restore vision
involves making tiny cuts in the eye to remove the
cataract and replace the lens