Are there vitamin supplements (to help vision) recommended for people with normal eyes, at certain ages; or are the advertised supplements unproven?

Supplements: Certain vitamin supplements have been proven to help with certain conditions of the eyes. There are several published studies that show this. Certain conditions respond to certain vitamin and supplement treatments. There is a large body of evidence in many areas to show help.

Not really: Vitamins have not been shown to significantly reduce the risk of future vision problems in patients with otherwise healthy eyes. Exceptions include patients at risk for developing macular degeneration. There is a weak link between vitamin use and decreases in some forms of cataracts, but not enough to justify their use. There is no harm to using vitamins in rda doses, but over-use can be dangerous.