Most people are wise enough to buy sunglasses with UVA and UVB protection - I've even gone to the point of only buying only glasses with polarised lenses because (besides for reducing the brightness) they help reduce the glare from the road, water, or beach sand.
As someone I knew once said, you only have two eyes, so buy proper sunglasses. I don't know about you, but I reckon that's a pretty fair statement.