For every pair of 4sight sunglasses you buy, they give a new pair of corrective eyeglasses to a person in need. They’re all about giving you a clear, tangible way to change the life of a person in need and the world. Thankfully, there is a solution to this problem is simple and well-known: glasses! For these people, a simple pair of eyeglasses is truly life-changing. One billion people around the world lack the eye-care they need to lead normal, productive lives; for these people, a simple pair of eyeglasses is truly life-changing.