Arab Today, arab today asian students are at greater risk of eye strain
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Myopia epidemic amongst young readers

Asian students are at greater risk of eye strain

Arab Today, arab today

Arab Today, arab today Asian students are at greater risk of eye strain

Asian students are at greater risk of eye strain
London - Arabstoday

Asian students are at greater risk of eye strain Staying indoors, poring over books and \'intense\' levels of education have been blamed for an epidemic of short-sightedness sweeping across eastern Asia. Myopia, or short-sightedness, now affects between 80 per cent and 90 per cent of school leavers in the major cities of countries such as China, Japan and South Korea, say experts.
Between 10 per cent and 20 per cent of sufferers are said to have \'high\' myopia, which can lead to loss of vision and even blindness.
Writing in The Lancet medical journal, Professor Ian Morgan, from the Australian National University in Canberra, and colleagues suggest that the powerful Asian education ethic may be largely responsible.
Recent evidence suggests short-sightedness is to a great extent due to environmental rather than genetic factors.
Numerous tudies have shown a link between close reading and intensive study and myopia.
The experts wrote: \'The rise in myopia prevalence in urban east Asia might therefore be plausibly associated with the increasing intensity of education.
\'Moreover, east Asian countries with high myopia now dominate international rankings of educational performance.\'
One Australian investigation, the Sydney Myopia Study, showed that children who read continuously or at a close distance were more likely to be short-sighted.
More recent work had indicated that increased amounts of time spent outdoors may protect against myopia.
\'The protective effect seems to be associated with total time outdoors, rather than with specific engagement in sport,\' said the experts.
Greater exposure to sunlight may protect eyesight by stimulating the release of retinal dopamine, a \'neurotransmitter\' involved in nerve signalling.
The ability of bright light to reduce myopia risk had been demonstrated in animals, including primates, said the experts.
They added that genetic factors also played a role in myopia risk. The contribution made by many small-impact genes, and gene-environment interactions, was yet to be established.
The experts concluded: \'Even if successful prevention is possible, east Asia will still be faced, for close to the next 100 years, with an adult population at high risk of developing pathological (high) myopia.
\'Further progress in our understanding of the natural history of pathological myopia is thus essential, and while there have been some promising developments in treatment, more effective treatments are still required.\'
 

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