Like snowflakes and fingerprints no two eye colors are the same. Brown eyes are the most common color but there are varying shades, same with blue, green and other hues making no two irises alike even between identical twins. The irises have two layers and the back one almost always contains brown pigment, in the front layer the amount of pigment determines the color, a lot of brown pigment will result in brown eyes, blue eyes have no pigment in their front layer where green and hazel have very little pigment. Another thing that makes us all unique...like everyone else!
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| heterochromia (different colored irises) |
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