Strange that they would say that....I have similar Rx and got my prescription Rx through them. I got the Rudy Project and I think they are are the Horus model but let me check. They nailed the Rx right on and it was the first style of wrap-arounds I have ever worn.
Yep, here they are
http://www.sportrx.com/rudy-project-horus.html
I got them with the dawn to dusk tinting package and love them.