Why Are Brown Eyes Most Common?
Ever found yourself wondering just why brown eyes are so common?
As it turns out, there’s a reason why most people have brown eyes; in fact, it’s estimated that more than 50% of the world’s population has brown eyes. If you think this number’s big, consider this: all humans used to have brown eyes, until an ancestor with a genetic mutation developed what we now know as blue, green, and hazel eyes. Thanks to this mutation, we now have a variety of eye colors on the planet.
There’s a lot more cool info about brown eyes and why they happen. Consider busting out these fun facts during your next trivia night – your friends will be amazed!
- Brown eyes are far more common in people who live in warmer climates. This is because excess melanin (which causes the brown colors of the iris) protects the eyes from sunlight. Since warmer climates tend to have more sunlight, this means that brown eyes are more common in cultures near the equator.
- On the other hand, blue, green, and hazel eyes happen when the iris has less melanin. This characteristic is more common in people who live in colder climates, as they may not get as much sunlight.
- People with brown eyes are less likely to develop certain eye disorders, like age-related macular disease. Interestingly, scientists are at a loss to explain why that might be. Of course, having brown eyes isn’t an ultimate protection against disease and poor vision; you’ll still need to visit your ophthalmologist.
Want to keep your eyes protected now, no matter the color – for years to come? Schedule a consultation with ophthalmologist Dr. Jacqueline Griffiths at NewView Eye Center in Reston, VA today. 703-834-9777
NewView Eye Center serves the greater Washington, DC metro area.