Is it possible for a human to have two pupils in one eye?

Yeah, but not the way it's pictured. If the central opening in the iris (the pupil) is closed or displaced peripherally, then a second, more central opening could be made surgically. This can sometimes happen as a result of penetrating trauma (mor... read more

And to have one optical nerve in the eye, it would be likely that the vision in the right eye would be extremely blurry and corrupted considering both of our eyes work together for a sense of depth. If the right or left eye was to have more than one pupil, it would distort the depth reception in the eye. read more

Brown eyes are rich in melanin deposits, and blue eyes indicate a lack of melanin. The melanocytes of the iris rest in a richly innervated psuedosyncytium, which is necessary to maintain eye color. Two genes control eye color: EYCL3, found on chromosome 15, which codes for brown/blue eye color (BEY), and EYCL1, found on chromosome 19, which codes for green/blue eye color (GEY). read more