I read an article once about what type of sunglasses you should buy according to the shape of your face. It had pictures of a round face, a square face, and oval face, and a heart face I think, and what shape lenses to buy according to your type. Anyone ever heard of this or know what I'm talking about? If you have any information or have read the article could you let me know? BTW, I have a round face, so I'd be asking for suggestions based on that.