Oakley's website used to have a lens simulator. I don't think they valued it much because I could only find it from a Google search. I was hoping to find that the Prizm range of lenses would be added soon, but it looks like Oakley have removed it. Why??? Is was easily the most informative thing on there when looking for a suitable lens. I've tried visiting London's Oakley store earlier this month but they claim that they can't get hold of any Prizm lenses at all yet.