-- Robert Preidt
FRIDAY, Aug. 16 (HealthDay News) -- People with sleep apnea are
at increased risk for glaucoma and should be screened for the eye
disease, a new study suggests.
Researchers examined the medical records of more than 1,000
people 40 and older who were diagnosed with sleep apnea between
2001 and 2004, and compared them to a "control" group of more than
6,000 people without sleep apnea.
Those with sleep apnea were 1.67 times more likely to develop
the most common type of glaucoma (open-angle glaucoma) within five
years of their sleep apnea diagnosis than those in the control
group, according to the study, published in the August issue of the
Glaucoma is the second-leading cause of blindness worldwide.
While previous research has found that glaucoma is more common
among people with sleep apnea, this study concluded that sleep
apnea is an independent risk factor for open-angle glaucoma.
"We hope that this study encourages clinicians to alert obstructive sleep apnea patients of the associations between obstructive sleep apnea and open-angle glaucoma as a means of raising the issue and encouraging treatment of those who need it," wrote Herng-Ching Lin, of the College of Medical Science and Technology at Taipei Medical University in Taiwan, and colleagues in a journal news release.
Sleep apnea -- characterized by disrupted breathing during sleep
-- affects more than 100 million people worldwide, and nearly 60
million people have glaucoma. If untreated, glaucoma reduces
peripheral vision and eventually may cause blindness by damaging
the optic nerve. Only half of people with glaucoma are aware of it,
because the disease is painless, and vision loss is typically
All adults should get a baseline eye exam by age 40, when signs
of disease and vision changes may start to occur, the American
Academy of Ophthalmology advises.
The study found an association between obstructive sleep apnea
and open-angle glaucoma. It did not prove cause and effect.
The U.S. National Eye Institute has more about
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