An optician can prescribe lenses to help make glare less of a problem. Tinted lenses and photochromic lenses - which react by darkening when the light is bright - may be particularly helpful. If you need lenses for driving, bear in mind that photochromic lenses will not darken effectively inside modern cars as their windscreens contain a filter which blocks ultraviolet (UV) light. It is the UV in sunlight that makes photochromic lenses darken. Problems with glare often worsen with age. They are sometimes associated with the development of cataracts.