Facts about human eyes can be surprising. The human eye is your second most complex organ after the brain. It has over 2 million working parts! One million nerve fibers connect it to the brain! As all the pieces work together, they process around 36,000 bits of information per hour. By the way, the human eye is responsible for 80% of everything you learn.

How many colors can your eyes distinguish? Why do you have way more in common with sharks than you think? What were the first creatures to have eyes like? Why we often get red eyes in photos? Can you sunburn your eyes? So, here are 30 amazing things you should know about human eyes.

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