By Hannah Landecker ~ Originally published in Hidden Treasure: The National Library of Medicine, 2011. Most people have two eyes directed forward. In ophthalmology textbooks

By Hannah Landecker ~ Originally published in Hidden Treasure: The National Library of Medicine, 2011. Most people have two eyes directed forward. In ophthalmology textbooks
By Hannah Landecker ~ Originally published in Hidden Treasure: The National Library of Medicine, 2011. Most people have two eyes directed forward. In ophthalmology textbooks
By Ginny A. Roth If you can read this chart, then you may have very good vision. This international, multilingual eye-test chart is the creation