Hey. I'm trying to replace my IC Berlin sunglasses lenses with prescription one. Frame is 8 base frame and my prescription is Left:-2.25D Right:-1.75D PD:61mm. Sungrasses size is 62-12-140. Do you think I can replace them? I may wanna go with transition lenses which change it's shade. I did some research and it seems that there are several type of lenses; polycarbonate, urethan, HOYA trasition, CR-59, Hi-index lenses, and etc. I don't know exactly differences of them. Do you have any suggestion or recommendation? Thanks for your time.