Study finds 2.9% prevalence of glaucoma in rural Mongolian population
The prevalence of glaucoma in a rural adult population in northern China proved similar to that of other Asian populations, a large study found. In addition, glaucoma was severely underdiagnosed, and unilateral glaucoma-related blindness was highly prevalent, results showed. “The increasing prevalence of the disease and a rapidly aging population are significant indicators that the problems and health complications caused by glaucoma may increase significantly in the near future,” the study authors said.The population-based cross-sectional survey included 5,197 subjects randomly selected from the population at least 40 years of age in Kailu County, Tongliao, Inner Mongolia. Mean patient age was 55.87 years. Complete data were available for 5,158 patients.
Subjects were interviewed and underwent complete ophthalmic examinations that included applanation tonometry, central corneal thickness, gonioscopy, slit lamp examination, dilated fundus evaluation, and visual field testing.
Age- and gender-adjusted data showed that of the 5,197 patients responding to the survey, 169 (2.9%) had glaucoma. The prevalence of primary angle-closure glaucoma was 1.42%, and the prevalence of primary open-angle glaucoma was 1.41%.
Of the 169 subjects with glaucoma, 54 (60%) had a known history of primary angle-closure glaucoma and three (4.1%) had a known history of primary open-angle glaucoma.
Unilateral blindness from primary glaucoma was identified in 27 subjects (16.56%). Bilateral blindness was identified in six subjects with primary angle-closure glaucoma and six subjects with primary open-angle glaucoma.
More than 90% of primary open-angle glaucoma cases were previously undetected.
The prevalence of all glaucoma types increased with age, the authors said.
Subjects were interviewed and underwent complete ophthalmic examinations that included applanation tonometry, central corneal thickness, gonioscopy, slit lamp examination, dilated fundus evaluation, and visual field testing.
Age- and gender-adjusted data showed that of the 5,197 patients responding to the survey, 169 (2.9%) had glaucoma. The prevalence of primary angle-closure glaucoma was 1.42%, and the prevalence of primary open-angle glaucoma was 1.41%.
Of the 169 subjects with glaucoma, 54 (60%) had a known history of primary angle-closure glaucoma and three (4.1%) had a known history of primary open-angle glaucoma.
Unilateral blindness from primary glaucoma was identified in 27 subjects (16.56%). Bilateral blindness was identified in six subjects with primary angle-closure glaucoma and six subjects with primary open-angle glaucoma.
More than 90% of primary open-angle glaucoma cases were previously undetected.
The prevalence of all glaucoma types increased with age, the authors said.
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