Just Shove Your Noggin In Here, Kid

9/48 Nat Geo by Justin Locke

A supervisor at George Washington University’s then-new eye clinic checks a toddler’s eyes for double vision. The clinic routinely covered a child’s “good eye” in order to strengthen the poor one in youngsters who had lost their ability to fuse what their two eyes view into a single picture. The two onlookers seem to be sizing things up just fine.