Serengetti 6698's - best in the world?

[Boeing 7E7]

Does anyone know whether you can get these as perscription lenses and how you can go about it (and still get them relatively cheap)?

[Miserlou]

I chose Randolph first over Ray Ban as I thought the former better. Ray Ban's are for people (posers) who want to look like pilots.
Neither were very comfortable for longer periods.

Then having followed some threads here I bought some Serengeti Velocity with Drivers Gradient lenses.

Without a doubt the best sunglasses I've ever owned!