I need reading glasses so for biking I started to wear a contact lens (mono vision... so I can read a cue sheet & see distance) - I like it so much I wear the one lens every day... When riding I like my Coyote sunglasses with interchangeable lenses for different riding conditions. They are better than the expensive Addidas glasses I had as the nose piece cant fall apart! AND THEY WERE ON SALE AT NASHBAR FOR ABOUT $20 BUCKS...IF YA' LOSE 'EM IT'S NO BIGGIE!!!!!!!!