Robert Twint, Sarasota, Fla.

A: Yes, there are contact lenses that prevent direct and reflected UV rays from passing through the cornea and entering the eye. This is important because with regular, untreated contact lenses, only about 10 percent of UVA radiation and 30 percent of UVB radiation is blocked.

For example, three Acuvue styles by Johnson & Johnson Vision Care block 90 percent of UVA rays and 99 percent of UVB rays. It's worth noting that they have the seal of acceptance for UV-absorbing contact lenses from the American Optometric Association and the World Council of Optometry.

Contact lens wearers are at greater risk of eye damage than eyeglass wearers because most contact lenses allow more unfiltered rays to reach the eyes than glasses do. This is in addition to unfiltered rays that go around eyeglasses and sunglasses.

A final note: For maximum eye protection outdoors, wear UV-blocking contact lenses with UV-absorbing sunglasses and a wide-brimmed hat.