>
>I'm glad you asked...You must purchase a "Miracle RV Rear-Viewer Thingy".
>
>I don't know the brand name, (obviously), but ANY worthwhile RV supply
>purveyor will have this wonder of modern science (since the 1960's).
>

I believe these things are called Fresnel lenses -- although I doubt your
local RV store would call them that.

Michael Townsend