These sunglasses are made to fit over your prescription glasses. I decided to give these sunglasses a try because I did not want to spend a lot of money on a pair of prescription sunglasses. I have used these for well over a year and I am very happy with how well they have held up. I use them every single day and the screws that hold the temples in place have not loosened at all. I recommend these if you wear prescription glasses and are looking for some sunglasses. They can save you a lot of money.