I've been told I have multicoloured eyes for as long as I can remember, and so I just decided to read up a bit about it on wiki. According to the
article, there seem to be three main types of this 'heterochromia'. The main kind is where each eye is a different colour from the other. Then there's 'sectoral heterochromia', where there is a patch of a different colour on one of the eyes. And finally, 'central heterochromia', where the centre of the coloured part of the eye is a different colour from the outer coloured bit. From what I gather, each of these conditions are pretty rare. However, having quickly checked to make sure, I can confirm I have all three of them!
One of my eyes is mostly blue, but with a thin brown ring running round the pupil. And the other eye is pretty weird. There's a slightly thicker brown ring running around the pupil, while the rest of the eye is mostly (quite dark) green, although maybe around 1/3 of the outer bit is still brown.
From what I've read, this is caused either by something to do with melanin levels, or by disease or injury... I'm hoping it was the former in my case.
Anyway, I coudn't really find any stats on how common this is, although I do remember once when we were checking the colour of each other's eyes in a class at school once, I was the only one with multicoloured eyes. I wonder if any other orgahs have this unique trait? Even if it's just a disease, I still think it's pretty cool.

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