January is Glaucoma Awareness Month
By Zack Steele
Since this month is Glaucoma Awareness Month, I thought I would share about a new study from Australia that may offer a new way of identifying people at risk of glaucoma years before vision loss happens.
Glaucoma is a leading cause of blindness. But because vision damage often occurs gradually, most people with the eye disease do not realize they have it until a good deal of their sight has been lost. If caught early, though, there are medications and procedures that may help treat glaucoma.
In the study, researchers were able to predict who was at increased risk of developing the eye disease with some accuracy by measuring blood vessel thickness in the retinas of study participants using a computer-based imaging tool.
Those with the narrowest vessels at the beginning of the study were four times more likely to have developed glaucoma a decade later.
About three million Americans and 60 million people worldwide have glaucoma, and the numbers are projected to rise over the next few decades as the population ages.
The disease involves damage to the optic nerve, which relays images from the retina to the brain.
Early detection is key, but without regular eye exams, most people don’t know they have a problem. Optometrists call this disease a “thief of vision” because most people with it have no idea that they have lost sight until it’s too late to bring it back.
In the study, researchers from the University of Sydney followed nearly 2,500 adults ages 49 and older for 10 years.
None of the participants had glaucoma when they entered the study.
Compared with the group as a whole, those people who were diagnosed with the eye disease during the following decade were older, had higher blood pressure and were more likely to be female.
The researchers concluded that measuring retinal-vessel narrowing could help identify people at risk for glaucoma. But they added that blood pressure and other factors that can contribute to vessel size would need to be considered.
The study appears in the latest issue of the journal Ophthalmology.
The researchers say that the findings also highlight the importance of having regular eye exams as people age.
The American Optometric Association recommends eye exams for adults aged 18 to 60 every two years, every year for adults 61 and older, or as recommended by their eye doctor.
In addition to glaucoma, regular exams can detect other eye diseases associated with aging, including macular degeneration and cataracts.
I have said it many times in this column, but yearly eye exams are crucial in detecting early problems related to the eyes and the whole body.
Dr. Zack Steele is a 2003 graduate of UAB School of Optometry. His practice, Trussville Vision Care, is located on Chalkville Road in downtown Trussville.