Complete heterochromia is when a person’s irises are each a different color — one blue and one green, for instance. Central heterochromia is when there’s an inner ring of color in the iris that’s different from the outer ring (usually in both eyes); the famous 1985 photo of “Afghan Girl” Sharbat Gula in National Geographic is likely an example. Segmental heterochromia is when a single iris has different colors in different parts, often as a patch or a triangle. Most of the time, heterochromia is a mere genetic quirk that doesn’t affect a person’s vision in the slightest. Some people are born with it, while others develop it later in life. |
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