Fascinating Scientific Facts About Blue Eyes
Blue eyes are the result of a genetic mutation in the OCA2 gene that reduces melanin production in the iris
Genetic Mutation
Research suggests that all blue-eyed individuals trace back to a common ancestor who lived around 6,000–10,000 years ago.
All Blue-Eyed People Share an Ancestor
Blue eyes don’t actually contain blue pigment; they appear blue due to light scattering (Rayleigh scattering), similar to why the sky looks blue.
Lack of Blue Pigment
Because they have less melanin, blue eyes are more sensitive to bright light, making sunglasses essential in sunny conditions.
More Light Sensitivity
Many babies of European descent are born with blue eyes, which may change color as melanin develops in the iris.
Babies Often Have Blue Eyes
Some people with blue eyes notice their eye color shifting slightly due to lighting, mood, or age-related melanin changes.
Eye Color Can Change
Blue eyes can look brighter or duller depending on lighting, clothing, and surroundings.
Can Appear Different in Lighting
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