From Prada, the Women’s 52mm Cat Eye Sunglasses feature: Cat eye shape Acetate frame Standard gradient brown lens Not Rx-able Non-polarized  Imported.
From Jimmy Choo, these sunglasses feature: Plastic frame Square shape Rx able Gradient lens Non-polarized Anti-Reflective: No Interchangeable: No Approx. 55mm lens; 20mm bridge; 145mm temple Imported.