Even if you wear contact lenses that block UV rays, you still need sunglasses.
UV-blocking contacts shield only the part of your eye under the lens. UV rays still can damage your conjunctiva and other tissues not covered by the lens. Wearing sunglasses protects these delicate tissues and the skin around your eyes from UV damage.
To shield your eyes from as much harmful solar radiation as possible, always wear sunglasses that block 100 percent UV.
While UV-blocking contacts certainly are better than no UV protection at all, only sunglasses offer the combination of full eye coverage and complete UV protection including protection of the delicate tissues around the eyes from UV-induced skin cancer.
UV Map Index: See today's local UV levels.