[frogger]

I just looked up my lenses. They are Carl Zeiss T58 (polycarbonate). I've had them in the last three pairs of glasses and they are great. I twice tried to get progressive lenses in glasses from Lenscrafters, and they were horrible. Lense choice makes a huge difference. I didn't have to "give them time," either. They were right, from day 1. YMMV.