Blindness Linked As Potential Side Effect of Coffee amongst other things
San Francisco, CA -- (SBWIRE) -- 10/09/2012 -- A new study reveals that caffeine consumption, more than three cups of coffee to be particular, leads to an increased chance of having glaucoma, which, in turn, can lead to blindness.
Lead researcher, Jae Hee Kang, explains to Health Magazine, “While caffeinated coffee has several health benefits, drinking three or more cups of caffeinated coffee was found to be associated with increased risk of developing exfoliation glaucoma, particularly among those with a family history of glaucoma."
This research is not the first to link coffee and glaucoma. It has been seen potentially problematic for those who already suffer from glaucoma because it adds the pressure on the eyes. However, Kang argues that it can be linked to a more specific vision-related problem, which is the exfoliation glaucoma.
She explains that this condition occurs when materials in the eye is rubbed off the lens and iris.
This leads to the clogging up of the eye with liquid in its draining system, a condition known as inter-ocular pressure. This pressure leads to glaucoma.
While her claims sound strong, Kang’s actual study is still lacking. Her study was published in Investigative Ophthalmology & Visual Science; however, it still only survived data from two studies only.
One study examined 78,977 women while the other focused on men, 41,202 of them to be precise. Yet the problem is not with the numbers, it is with the conclusive cause-and-effect manner that the study is written in.
The significance of her findings is still weak.
However, her team did manage to specify things we did not know before, such as the quantity of drinking coffee needed for this dangerous correlation to take place (three cups of coffee).
The study ends with this conclusion, "We observed a positive association between heavier coffee consumption with risk of [exfoliation glaucoma or exfoliation glaucoma suspect] in this large prospective study."
However, not all are pleased with this study, particularly ophthalmology professor Alfred Sommer of Johns Hopkins University, who told Health, "These two studies have yielded literally thousands of articles, almost all of little value."
Sommer explains that the study did not take into account many influential variables in a study.
He adds, “To make matters worse, the conclusions in [Kang's] study don't even reach statistical significance."
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