If you have some vision problems, I suggest you to buy a pair of prescription sunglasses. Prescriptions sunglasses can help correct your vision problems as well as block harmful UV rays from the sun. But if you don't have any vision problems, you can buy a pair of regular sunglasses. But recently I am thinking about buying a pair of photochromic lenses glasses, because I heard that they can work as a pair of sunglasses in the outside and a pair of prescription glasses inside. I think a pair of photochronic glasses can provide me all the functions and I won't need to take off sunglasses and put on my prescription glasses when I am in the house. it is so convenient. But I am still thinking about that because I think they are a little expensive and I just bought a pair of prescription sunglasses last week.
