A team of scientists uses the power of lasers to find and remove vision defects in monkeys

This article originally appeared in National Geographic. 

By Michael D. Ruddy Michael Ruddy is the managing editor of National Geographic Traveler.

His latest book, Unbeatable: A Journey Into The World of Our Imagination, is published by HarperCollins. 

Follow him on Twitter at @RuddyMichaelRuddy