The main difference between butterfly and cat eye sunglasses is their shape and design. Butterfly sunglasses are a type of eyewear that have a distinct butterfly shape, with a wider bridge at the top and a narrow bridge at the bottom. Cat eye sunglasses are a type of eyewear that have a distinctive curved shape that is wider at the top and tapers down to a point at the bottom. They both are often considered to be a more modern and trendy option for women. Click to find more...