Drinking more than three cups of coffee a day may increase the risk of vision loss and blindness, according to American research.
Even moderate amounts of the drink make developing the devastating eye condition glaucoma more likely.
Funnily enough they don't tell you what the increased risk is - maybe it's not all that much? You know featuring the words "not statistically significant":
Compared with participants whose cumalatively updated total caffeine consumption was < 125 mg/day, participants who consumed > 500 mg/day had a trend toward increased risk of EG/EGS that was not statistically significant (RR = 1.43; 95% confidence interval (CI), 0.98-2.08); P trend = 0.06).
Carry on drinking the coffee folks - it's something else that's making you blind!