when my kids asked him why one eye is blue and one eye is brown he told them..
For the record, it is the IRIS, not the cornea that is the colored part of the eye, so I am not sure what your uncle’s story is. A cornea transplant would not change an eye color. Maybe he has a cataract on the other eye, making it appear a different shade. In any case, DON’T SMOKE – – it’s really bad for you and for everyone around you.