Firstborn Kids More Likely Nearsighted And It May Be Their Parents' Fault, Cardiff University Study

Firstborn children may have a slightly higher risk of becoming nearsighted later in life, compared with later-born siblings, new research suggests.

In the study, researchers looked at birth order and nearsightedness in about 89,000 people, ages 40 to 69. The investigators found that firstborns were 10 percent more likely to be nearsighted than were later-born participants. Firstborn individuals were also 20 percent more likely to be severely nearsighted than later-born individuals, the investigators found.

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