This French physiologist was born on July 12, 1813. Why are we celebrating his birthday? Because, he is associated with research on heterochromia. Duh. Ok, still not understanding why we’re blowing out the candles on his cake?

Heterochromia is a condition where a person has two different colored irises. What would you put down as your eye color on your drivers license?

Naturally, July 12th has been designated Different Colored Eye day. If you have two different colored eyes - celebrate your uniqueness today. You’ve got some famous company, Dan Aykroyd, David Bowie, Kate Bosworth and Mila Kunis. There are also some fictional characters like Vile of Mega Man X who has one red eye and one blue/green eye.