All those long hours studying make Asian kids really good at school, but that academic accomplishment comes at a steep price - ophthalmically speaking:

Up to 90% of school leavers in major Asian cities are suffering from myopia - short-sightedness - a study suggests.

Researchers say the "extraordinary rise" in the problem is being caused by students working very hard in school and missing out on outdoor light.

The scientists told the Lancet that up to one in five of these students could experience severe visual impairment and even blindness.

BBC's science reporter Matt McGrath has the report:Link