Wednesday, 19 December 2012

Half a million Chinese are blind due to diabetic retinopathy

The prevalence of visual impairment due to diabetic retinopathy in Beijing residents was 0.25%
by Michael Woodhead
More than half a million older Chinese people have lost their sight due to diabetic retinopathy, a major study carried out by Beijing researchers has found.
Dr Qi You and colleagues from the Beijing Institute of Ophthalmology, Beijing Tongren Hospital screened a population of more than half a million rural residents near Beijing who were aged over 55. The study involved over 2500 ophthalmology technicians who carried out visual screening checks for retinopathy.
Of the  562,788 people screened, 54,155 (9.6%) had a visual acuity of <0.30 in at least one eye.
The most common cause of vision impairment was cataract, which was seen in 19,163 (3.4%) of people. Diabetic retinopathy was detected in 2.7% of the population screened. Visual impairment due to diabetic retinopathy was bilateral in 66% of these patients.
The prevalence of visual impairment associated with diabetic retinopathy was 0.25%, which is similar to the results of the previous Beijing Eye Study, in which 0.54% of people screened showed
severe non-proliferative or proliferative diabetic retinopathy.
"Transferred to the total population of China of 206 million subjects aged 55-85 years, it
indicates that 514,000 Chinese in that age group are blind due to diabetic retinopathy," they conclude.
Source: Clinical and Experimental Ophthalmology

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