Though the scientific research is lacking, it is very likely that green is one of the most rare eye colors worldwide. It's commonly quoted that only 2% of the world’s population has green eyes, though it’s difficult to determine where that number came from.

Even if the number is accurate, 2% of the world's 7.3 billion people is 146 million. This is roughly the population of Russia. That's not to say that green eyes aren't special, because they are! It just depends on where you happen to be. In most parts of the world, almost everyone has brown hair and eyes, with green being very rare or absent altogether.

Green eyes are sometimes confused with hazel eyes, which have both brown and green in them. To tell the difference, go into natural lighting (outside during the day), and look at your eyes compared with someone you know to have green, hazel, or brown eyes. The difference should be clear between them.

An estimated 70 to 90 percent of the world's population have brown eyes. 8 percent of the world that have blue eyes. Only 3 percent of people have gray eyes.

More Info: owlcation.com