I've had a pair of these for a while now, and I generally like them. The design is one of the best. The optically correct bit was one of the reasons I got them, but I don't believe it. After a full day riding, when I take them off, my vision is weird and feels distorted for about an hour afterwards - like my head is in a fishbowl. This does not happen with my other pair of similar price, top-range goggles.