This is probably due to a split between halves of the brain, so one gene can be expressed on one side and one on the other. My husband has eyes which don’t “talk” to each other, so they look in different directions.
Different coloured eyes can also be the result of some kind of pigment growth or bacterial infection (but in this case you are not born with it). Such an infection can be completely safe and only manifest itself in changing the colour of one eye. I have seen cats with different coloured eyes but not people – my old cat Rupert had two green eyes and started getting freckles in one eye when he was about 1 year old. By the time he died at 15 that eye was entirely brown.
Sometimes you are born that way, where the pigments expressed by the genes have not done the same in both eyes, sometimes it is because you have more melanin in one that the other and like your skin getting freckles the colour darkens to brown over time (like Rowena’s cat) or it can be as a result of injury – look up David Bowie, he’s about the most famous person I know with odd colored eyes and he injured one when he was younger.
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Kate commented on :
Sometimes you are born that way, where the pigments expressed by the genes have not done the same in both eyes, sometimes it is because you have more melanin in one that the other and like your skin getting freckles the colour darkens to brown over time (like Rowena’s cat) or it can be as a result of injury – look up David Bowie, he’s about the most famous person I know with odd colored eyes and he injured one when he was younger.