Our eyes are amazing things! Most people blink 15 to 20 times every minute. For humans and many other animals, blinking is a reflex, which means your body does it automatically. The eyelid protects the front of the eye. When you blink, your eyelids move tears across your eyeballs, cleaning them and keeping them moist.
Some animals like fish, snakes and some lizards don't blink because they don’t have eyelids, and some animals don't have eyes at all. Feast your eyes on this photo series of amazing animal eyes from National Geographic Kids.
Check out these books for more eye-opening facts!