Why do i have a brown spot in my eye? hi, i have a brown spot in my right eye (which is lazy). i believe it has been there since birth and it's very

Likely a birthmark..: This spot is likely a small nevus. It is like a birthmark or beauty spot. Overtime it should stay about the same size. If it starts to get bigger, you need to have an ophthalmologist take a look at it. If you can, get a closeup picture of it and save it for future reference. If no one has ever told you why you have a "lazy eye" you should save that that checked.