Here is what I've learned so far ......
Aniridia - congenital absence or partial absence of the iris. (http://www.aniridia.net/whatis.html) However, aniridia is more than just being born without an iris. (See below : Other issues with aniridia.)
How Common is Aniridia? - Aniridia occurs between 1 in 50,000 to 1 in 100,000.
What Causes Aniridia? - The genetic defect has been found to be a deletion of chromosome 11. It is believed that aniridia is not caused by anything that a parent does or does not do.
Other Issues With Aniridia - Aniridics may have any of the following issues, in addition to having no iris.
- Wilms Tumor
- Lens Dislocation
- Corneal Pannus
- Foveal Dysplasia
- Optic Nerve Hypoplasia
For more information on any of the above mentioned conditions, I recommend reviewing the Aniridia Foundation International website :
Treatments - We have not been advised of any specific treatments yet. I have learned that aniridics should wear sunglasses or have their eyes shaded from the sun. Aniridics must keep a regular schedule of appointments with opthalmologists. They must also receive an ultrasound of the abdomen for the first 5 or so years of life to be sure the Wilms Tumor has not developed.
Useful Links :
Aniridia Foundation International - http://www.aniridia.net/
Aniridia Network - http://www.aniridia.org/