👁️ World Eye Color Distribution & Iris Genetics LabBiophysical Optics & Multi-Locus Sim
Global baseline: Brown 74.5% (70–79%), Blue 9% (8–10%), Hazel 5%, Amber 5%, Gray 3%, Green 2%, Red/Violet <1%, Heterochromia <1%
Iris Optics SynthesizerBrown Phenotype
28%
85%
45°
Demographic Representation (10,000 Individuals)Region: Global Aggregate
Brown Eye Share74.5%
Blue Eye Share9.0%
Green Rarity2.0%
Rare/Structural (<1%)1.0%
Click any individual dot to inspect simulated eyeSelected: Dot #42 (Brown)
Each dot represents 1 of 10,000 sampled individuals distributed according to verified regional allele frequencies. Notice the overwhelming prevalence of eumelanin-dense stroma in global founder populations.
Polygenic Locus Simulator (HERC2 rs12913832 + OCA2)Non-Mendelian Epistasis
Calculated Offspring Phenotype Probabilities:
Biological Optical Cross-SectionRayleigh Scattering vs Melanin Absorption
• Blue/Gray Eyes: Clear stroma without eumelanin; short wavelengths (450nm) undergo Rayleigh scattering against stromal collagen fibers and reflect back.
• Green/Hazel/Amber: Low-to-moderate melanin combined with lipochrome (pheomelanin) creates a yellowish filter over the blue structural backscatter.
• Brown Eyes: Dense eumelanin absorbs virtually all incident photons across 400–700nm spectrum, preventing structural backscatter.