Moalims

LONDON - First-born children run higher risk of becoming nearsighted later in life, compared with their later-born siblings, says a study.

Parents pushing the eldest kid to do better in studies may be partly blamed for the higher myopia risk among the first-borns, Live Science reported.

"Our study provides an extra piece of evidence linking education and myopia, consistent with the very high prevalence of myopia in countries with intensive education from an early age," study author Jeremy Guggenheim - of Cardiff University in Britain - was quoted as saying.

For the study, researchers examined birth order and nearsightedness in about 89,000 people, ages 40 to 69, in Britain. First-borns were 10 per cent more likely to be nearsighted and 20 per cent more likely to be severely nearsighted than their subsequent siblings, the findings showed, the study said.

Reduced parental investment in education of children with later birth order may be partly responsible, the researchers said. Education accounted for about 25 per cent of the link between birth order and the risk of nearsightedness.

However, in addition to education, there may be other, unmeasured factors that could partially mediate the relationship between birth order and one's risk of nearsightedness.

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