Q:

How rare is heterochromia in humans?

A:

According to Dr. Andrew A. Dahl, the chance of having congenital heterochromia iridis is 6 out of 1000. Heterochromia iridis is an uncommon condition in which the two eyes are different colors. Heterochromia can also be acquired, often as a result of disease or other abnormalities, explains Dahl.

Congenital heterochromia iridis is either present at birth or it begins a short time later. Congenital heterochromia is inherited as an autosomal dominant trait and is unassociated with any other ocular or systemic abnormality. Dahl explains that eye of lighter color usually shows some loss of iris and is regarded as the affected eye. The lighter iris may be differently colored throughout or only in part.


Is this answer helpful?

Similar Questions

  • Q:

    Is 20/13 vision good?

    A:

    According to How Stuff Works, 20/20 vision means that a person can see what a normal person can see when standing 20 feet away. A person with 20/13 vision is above average because it means he can see at 20 feet what a normal person can see at 13 feet.

    Full Answer >
    Filed Under:
  • Q:

    Can dog fleas bite humans?

    A:

    Although dog fleas prefer to live on furry animals, they do bite humans if given the chance. Like most fleas, they are opportunistic feeders and feed on human blood as well as that of other mammals.

    Full Answer >
    Filed Under:
  • Q:

    What are the advantages of being a cosmetologist?

    A:

    According to students of the Aveda Institute in Tallahassee, FL, one of the main benefits of a career in cosmetology is the chance to turn a passion into a career. In addition to basic skin care and conditioning, cosmetologists are artists who specialize in hair styling, coloring and treatments, as well as make-up and nails. The more artistic and distinct their talents, the more customers and income they can generate.

    Full Answer >
    Filed Under:
  • Q:

    What are the chances of getting pregnant on my fertile days?

    A:

    According to WebMD, the chance of a healthy woman getting pregnant during the fertile period of her cycle is between 15 and 25 percent. This figure assumes that the woman is actively trying to have a child.

    Full Answer >
    Filed Under:

Explore