It's been a number of years, but I began to have a lot of trouble seeing--blurred vision, trouble focusing. When I started taking the vision formula I almost immediately saw (literally) a huge change. I was able to focus again and see much better. Later a new ingredient was added and I noticed my night vision became demonstrably clearer. This formula really works. I also give it to my 92-year-old friend, and I am sure it's the reason her eyesight has been almost stable for several years. I highly recommend this very effective supplement.