That I'm not sure ..... Like some of the other guys on here I can't justify spending big money on sunglasses. A scripted pair probably be (or at least should be) better but I thought I'd give these a try. They have different sizes and colours too .... check the website. They're big enough to fit over my glasses but not too big to look dorky! They also seem to block out most of the sunlight from the sides ... and they're pretty comfortable too.