Being that these are CLEAR glasses, I don't think it will come as a surprise to people that they don't serve any purpose except to achieve a certain look. These were just the right size, as large, over-sized frames were the look I was going for. I don't wear these often, but they're comfortable, cute and actually pretty thick and sturdy. They actually feel slightly sturdier than my Rayban thick-templed glasses, but I probably wouldn't put real lenses in them.