Do cheap sunglasses protect the eyes as well as expensive ones?

Yes, according to a report in the Boston Globe:

"If your sunglasses block 100 percent of UVA and UVB, you don't have to spend $250 for designer glasses," said Dr. Kathryn Colby, director of the clinical research center at the Massachusetts Eye and Ear Infirmary.

(Foreman, "Do cheap sunglasses protect the eyes as well as expensive ones?", Boston Globe, Jul.11)