Why More Firstborn Kids Need Glasses

It’s bad enough for the first kid when a new baby shows up to steal your thunder. But the injustice is compounded when you have to start wearing glasses while your little sibling stays as cute and non-four-eyed as ever. If this sounds familiar, you’re not alone: firstborn kids are more likely to be nearsighted. Part of the reason might be that they get more education.

A study in the United Kingdom and Israel found that myopia—that’s nearsightedness, if you’re one of those lucky people who

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