I was born with blue eyes like all white babies, but at the age of around 14 months one started to change while the other remained the same. I now have a blue eye and a brown eye. But the brown has a patch of blue at the bottom. Although there is such a colour difference, not many people notice, unless I'm sat in direct sunlight or someone really looks into my eyes.
I've never experienced anything negative about my Heterochromia, most people either comment that it's "cool" or "weird", but in a good way! I have my own child now and she has blue eyes, but she does have a patch of dark hair on the top of her head, when the rest of her hair is very blonde. According to what I've read, this is another form of Heterochromia that I have passed onto her.
I never realised there were so many people out there who had the same thing I have.