Italian researchers found that coffee defends against blepharospasm, an involuntary eye spasm which makes patients blink uncontrollably, which may turn into a severe vision impairment, and in severe cases, this can make the patients functionally blind (despite intact eyeballs) as they cannot impede closing their eyes. One to two cups daily have this effect. The blepharospasm onset age was delayed by coffee drinking, with 1.7 years for each extra daily cup, and this could be due to caffeine's effect on the adenosine receptors.

here's some more interesting stuff i found
http://news.softpedia.com/news/Top-14-Coffee-Effects-on-Your-Health-7053...

How is coffee a laxative and a cardioprotector.