Only 8 Percent of The World's Population Has Blue Eyes
- Blue-eyed people are more sensitive to light.
- Blue eyes allow for better night vision.
- Blue eyes were the result of a mutation.
Originally, humans were all brown-eyed. Then someone in the Black Sea region from 6,000 to10,000 years ago had a genetic accident at conception that resulted in his eyes being blue. The mutation carried on as several other also had mutations after the Ice Age.
The OCA2 Gene Is Responsible for Blue Eyes
Also known as oculocutaneous albinism II, this gene is responsible for producing melanosomal transmembrane protein, or the P protein. It is located on chromosome 15. When it is repressed, the person gets blue or green eyes.
We don't know what exactly the P protein does.
- People with blue eyes are more likely to have red eyes in photos.
- Blue-eyed people are better at long-term and strategic thinking.
Green Eyes Are Extremely Unique and Very Rare
Although rare generally, green eyes are especially rare amongst the African and Asian race. However, a village in Western China has many individuals with green eyes and blonde hair. This is believed to be due to the Roman army settlement during ancient times. DNA testings revealed that these people had Caucasian origins, thus they were found with this rare occurrence.
Only 2% of The World’s Population Have True Green Eyes
Going by the math, this means only 140 million people have some shade of green as an eye color.
- According to research, it is said that green eyes have existed from the Bronze Age Era, which means that they have been around for thousands of years. This color is most commonly found in Europeans. It is also said that Europeans with green eyes are usually considered to be of German or Celtic descent.
- Green eyes do not appear immediately and are often said to take several months to appear. Babies who grow up to have green eyes are born with grey or blue eyes initially. The changes in the eye color occur after 6 months of age and can actually continue to change during the course of several years.
- According to medical science, people with light colored eyes such as blue, green or grey have a higher risk of eye cancer. Especially, Intraocular Melanoma.
- Interestingly enough, there are anthropological records of early humans with green eyes living around the mountain system in Eurasia between the Black Sea and the Caspian Sea. This area contained a natural land bridge between Europe and Asia.
Brown Eyes Help Prevent Some Cancers
The large amount of melanin in brown eyes can protect you from melanoma cancer because brown eyes are better able to block the sun’s harmful rays. While that doesn’t mean you can skip the sunglasses, it does mean you’re getting an added layer of protection under those shades.
Men With Brown Eyes Are Perceived As More Dominant
A study conducted in Czechoslovakia suggests males with brown eyes are considered more dominant than those with blue eyes. Scientists suspect it may be due to certain traits associated more with brown-eyed people. Brown-eyed males are more likely to have square jaws, thick eyebrows and broad cheekbones, traits that are also associated with adulthood, whereas blue eyes are associated with babyhood, so people may perceive those with blue eyes as child-like.
Reaction Times Are Faster in People With Brown Eyes
That melanin responsible for giving you those brown eyes also multi-tasks as an insulator for electrical connections within the brain. The more melanin, like those with brown-eyes, the faster and more efficient your brain can process signals, which may explain why you’re better at baseball or tennis if you have brown eyes.
Women With Brown Eyes Experience Pain Differently
A study conducted by the University of Pittsburgh showed that women with brown eyes didn’t tolerate the pain of childbirth as well as those with blue eyes. They also had higher levels of anxiety and depression following childbirth. Scientists believe this is due to the NCX-4 gene that is linked to brown eyes and controls a protein linked to pain receptors.
Others Facts About Eyes Color In Brief
- Brown-eyed people are less likely to have hearing problems.
- Brown eyes are the most common eye color.
- People with brown eyes are more difficult to read.
- You are less likely to drink as much as your blue-eyed counterparts.
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