Knowing Your Eyes application is created for iPad. It is based on so called activity sheets developed and distributed by the American Optometric Association in 2006-2011 for educational purposes. These self-tests will help you to learn how different parts of your eye work, how your eyes are bringing a clear images of the world, how well do you understand your eyes, as well as how different eye conditions are defined and treated. An app is developed with the permission of the American Optometric Association.