Supplements for your eyes?

I really want to do whatever I can while I am still relatively young to ensure that I age well. I don’t want to worry about my body falling apart as I age, as I want my quality of life to be as high as possible when I am old and no longer have to work. I definitely want to be able to read to my heart’s content. Lately I have been looking into natural eye health, and I have seen some supplements on the market that contain things that are supposed to be good for your eyes. Has anyone seen any research on these? Do they really help?