The caffeine contained in your daily dose of java may play a part in keeping your eyes in check. A recent study at the University of Maryland School of Medicine found that caffeine might provide protection against the lens damage that can lead to the formation of cataracts. They engaged in two different studies:
The team studied the oxyradical effects in vitro by incubating mice lenses in medium exposed UVA in the presence of kynurenine with and without caffeine. In vivo studies were conducted in rats by incorporating caffeine with galactose in their diet. In both cases, caffeine was found to be effective in protecting the lens against damage. (Source)Yet another reason to enjoy your morning cuppa -- if you needed another one, that is.