Do not use www.go-optic.com. I purchased about the most expensive pair of glasses with what I expected to be high end Zeiss lenses. When the glasses eventually arrived, both lenses had out of focus blur areas. Looking side to side, image would be in focus, go out of focus, and then back into focus. Returning the glasses to go-optic, they of course saw no issues and argued only my optometrist can tell go-optic that the lenses are defective…? I've the same prescription already in a pair of safety glasses with no issue. Then, they kept the glasses instead of returning them! Not that they were of any value to me, it still is effectively theft.