"While this study doesn't directly answer the question of why estrogen appears to guard women from glaucoma, it seems likely that estrogen may protect against the nerve damage that happens to the eye within glaucoma patients", she highlighted.
Drinking a cup of hot caffeinated tea every day can lower your risk of glaucoma, a new study has found. It now affects 57.5 million people worldwide, and is expected to increase to 65.5 million by 2020. Most types of glaucoma have no symptoms and can creep in and lead to blindness if they are not detected and treated early.
The researchers analysed data from the 2005-2006 National Health and Nutrition Examination Survey (NHANES) in the United States, which included eye tests for glaucoma.
Although prior research indicated that caffeine has the ability to alter intraocular pressure, a study comparing the possible impact of caffeinated and decaffeinated drinks on glaucoma risk has yet to be carried out.
The team chose the 2005-2006 survey because it also gathered data on glaucoma diagnoses.
Because this is an observational study, researchers say no firm conclusions can be drawn about why this may be.
The survey also included tests for Glaucoma, in which 5 percent adults out of 1,678 participants had developed the disease. There was no significant correlation between glaucoma and consumption of caffeinated and decaffeinated coffee, iced tea and soft drinks, and glaucoma.More news: Four winter sessions of Parliament shorter than present one: Minister
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Using a validated questionnaire-Food Frequency-the participants were asked how often and how much they had drunk caffeinated and decaffeinated drinks, including soft drinks and iced tea, over the preceding 12 months.
Participants who consumed at least six cups a week were 74% less likely to have glaucoma when compared with those who did not consume hot tea.
However, according to the researchers, tea contains antioxidants as well as anti-inflammatory and neuroprotective chemicals, which are linked with a decreased risk of serious conditions like heart disease, cancer, and diabetes.
Thus, the researchers suggest, it wouldn't be so far-fetched to consider that the consumption of tea could have a protective metabolic effect.
Despite the findings, many in the health profession encouraged people to take caution.
Dietitian Catherine Collins added: "Tea is a healthy drink, rich in antioxidant polyphenols such as tea catechins and other flavonoids".