Key Takeaways
- Worldwide, brown eyes are the most common, comprising 70-79% of the global population according to genetic surveys
- Blue eyes account for 8-10% of the world's population, primarily in European descent groups
- Hazel eyes represent about 5% of global eye colors, often a mix of brown and green pigments
- In Europe, 40% light eyes vs 2% in Asia
- Northern Europe: 80% blue/gray eyes in Scandinavia
- Baltic states: 70% light eyes prevalence
- In Caucasians, 40-50% blue eyes vs 5% in Asians
- African descent: 99% brown eyes
- East Asian (Chinese/Japanese): 100% brown/near-black
- Blue-eyed individuals trace to one ancestor 10,000 years ago
- OCA2 gene mutation causes 74% of blue eye variance
- HERC2 gene regulates OCA2, single SNP for blue eyes
- Blue eyes linked to lower melanoma risk, 50% reduced odds
- Brown eyes higher UV protection, 20% less photokeratitis
- Light eyes 2x risk of macular degeneration
Brown eyes are the world's most common eye color by a significant majority.
Ethnic Groups
Ethnic Groups Interpretation
Genetic Studies
Genetic Studies Interpretation
Global Distribution
Global Distribution Interpretation
Health Associations
Health Associations Interpretation
Regional Variations
Regional Variations Interpretation
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