If you are looking for reader sunglasses DO NOT BUY THEM AT WALMART VISION CENTER. I have bought three pair (stupid me) within the last 120 days. The small screws come out easily and you cannot buy or replace them. The sales clerk says they cannot replace them after 30 days even with a receipt. Each pair last about 40-45 days. I love the idea of the reader sunglasses but they need to have a better design or be able to satisfy the customer. I WOULD NOT RECOMMEND BUYING THEM FROM THE WALMART VISION CENTER IN MINDEN LOUISIANA.