Study says drinking coffee increases risk of glaucoma
October 6, 2012 12:50pm CST
A study has shown there is a big increase in risk for a certain type of glaucoma if one drinks 3 or more cups of coffee a day. My problem with the reports of the study is that there is no definition of what a cup of coffee is; that is how large, how strong, etc. Some reports have said that caffeine from other sources doesn't seem to have the same effect. I drink about two cups of coffee a day according to my filling my cup twice and drinking it and it is not that big a cup, not some large mug or something, but the level on the coffee pot reads almost 4 cups when I put in enough water to get my 2 cups. Also, I like my coffee fairly weak, Starbucks is way too strong for me. People have accused my coffee of just being colored water. Here is an example of a report on the study and no where is cup size or coffee strength mentioned: People who drink at least three cups of coffee a day might be increasing their risk of developing glaucoma, which can lead to vision loss or blindness, according to Harvard University researchers. Specifically, caffeinated coffee appears to be associated with a type of glaucoma called exfoliation glaucoma, which is characterized by tiny fibers peeling from the eye's lens that can cause a pressure build-up, the researchers said. "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," said lead researcher Jae Hee Kang, assistant professor of medicine at the Channing Division of Network Medicine at Brigham and Women's Hospital in Boston. The increased risk was on the order of 66 percent, Kang said. Since this is the first study to link caffeinated coffee and exfoliation glaucoma in a U.S.-based population, and because it is an association study and not a clinical trial, the results need to be confirmed through more studies, she added. "If confirmed," she said, "those at risk of exfoliation glaucoma particularly those with a family history of glaucoma would be recommended to limit their intake [of coffee] to less than three cups per day." The report was published Oct. 3 in the journal Investigative Ophthalmology & Visual Science. For the study, Kang's team analyzed data on almost 79,000 women who were part of the Nurses' Health Study and more than 41,000 men who took part in the Health Professionals Follow-up Study. None of these people had glaucoma and all said they had undergone eye exams from 1980 to 2008. In addition, the researchers used questionnaires to find out how much coffee they drank and also reviewed their medical records to find evidence of exfoliation glaucoma.
• United States
6 Oct 12
Too much coffee and you could get Glaucoma? I heard, just today, that drinking 3 cups of coffee a day will help prevent Alshimers disease. (Uh OO, my first symptom, I couldn't spell it!) That actually helps me out because I love coffee and I am already 57.
• Manchester, England
7 Oct 12
There is a long standing trend to associate various foods and beverages with illnesses and health conditions. It is virtually impossible to keep track of these because there are more being published on an ever increasing rapid basis. I am sure that there is some truth in quite a few of these type of reports, but I cannot possibly accept that they are all true. I pay very little attention to this type of news and certainly will not change my lifestyle accordingly. If we took all the medical reports at face value we would soon be limiting ourselves to bread and water only, and there are probably reports advising us not to eat too much bread. I am a self confessed coffee addict, and there is no way that I shall consider only 3 cups per day.
7 Oct 12
Hey, thank you for sharing this knowledge. It is worth reading! Though I never really take too much coffee these past couple of months due to my myofascial pain syndrome (mps). It is bad because I love coffee! I resort to drinking tea instead! Anyway, according to what you have posted, it says that 3 or more cups of coffee which I think is too much anyway. Too much of everything is not good. Thank you again for sharing, it is nice to learn new things!
6 Oct 12
It's hard to believe. My grandmother had it and never drank coffee, so are many people in many cultures where they don't drink coffee at all. I also know plenty of (old) people who do drink coffe whole day on from early in the morning to late at night and they have great eyes. BTW there are many studies if it comes to coffee and it's also proved that it is good for your health. I think if it comes to that it's the same with many things we eat and drink. They are good but also bad for your health. To be honest.. a study of 79.000 women and 41.000 men is not really great if I consider the amount of people living on this earth drinking coffee. Also there is a big difference of where you live. It's also not said that just the coffee is the reason why... it can be a combination of coffee, life style, kind of food etc etc. BTW it's also proved that a study mostly gives the outcome the questioner/scientist likes to hear since it's based on the answer he is looking for.
6 Oct 12
Hey thanks a ton for sharing this discussion over here. Well leave aside the glaucoma, excessive intake of coffee and tea is never safe for our health especially because of the caffeine content in them. The caffeine content in them should never go in excess into our body. Most of us are addicted to coffee and tea and in the process, we neglect the fact that the caffeine content can cause harm to our body just like glaucoma, acidity, liver problems, etc. So the intake of coffee or tea should be restricted to 2 cups a day. What say?