What Your Eyes Say About Your Brain

Eyes are the window to the . . . brain? A breakthrough study in Psychological Science finds that the small vessels behind your eyes could reveal how healthy your noggin is. (Feeling fried? Go green and Recharge Your Brain in 10 Minutes.)

The scientists found that people with wider veins scored worse on IQ tests in middle age. Other factors like smoking, diabetes, or socioeconomic status couldn’t be to blame for the scores, says Idan Shalev, the study’s lead author.

What gives? Your eyes’ vessels may reflect the condition of your brain’s vessels because they’re similar in size, structure, and function, says Shalev. “Eye vessels are developed from the same cells that brain vessels are developed from,” he adds.

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