Optical prescription insert for the Nashbar Oculus cycling sunglasses. This is a "blank insert". We'll ship it to you, then you drop it off with your optometrist and they'll grind it to your prescription. Once you have them, they clip right inside your shiny new Oculus sunglasses, so you can see clearly no matter what the lighting conditions are.
Insert lets you turn a pair of Nashbar Oculus glasses into the right glasses for you
"Blank" insert can be custom ground to your specific prescription