This is a flat lens, not an optically correct spherical lens. So there is some distortion when looking through the goggles. But for $40 on Tramdock not a bad deal at all. I have a medium round face and these fit my head very comfortably. They look cool (I bought the orange and white with ignitor mir lens), and even though its not a spherical lens it is high quality and not to shabby to look through. Fogging has not been an issue for me, keep your goggles on your face at ALL times when outdoors and no issues. I am very pleased with the googles, mostly because I picked them up for $40, For $140 you can get a good spherical lens google from Smith, but the Fuse goggles work great for me!