Aniridia is a rare disease (or ocular disorder) that consist in the congenital absence of the iris of the eye. It could only afect one eye, although it is more frecuently to be bilateral (on both eyes) as parcial or complete and generally associated with other disorders.

 

The more frequent are: Cataracts, Nystagmus, Glaucoma, Strabismus, Corneal degeneration and others.

•  This kind of disease can cause photophobia (anormal light intolerance).

•  To have visual acuity between 10% and 20% or lower if cataracts and glaucoma are present.

•  Can not distinguish an object detail against the light.

•  To read you will need straight light on the paper and the absence of shadows or reflections on cristals or mirrors.

•  You will have some difficulty to see in the distance.

Aniridia can be congenital as well as an hereditary disease. It is trasmited to the 50% of the descendant and if you have one member of your family without it, there is no probability that he could trasmit this disease

Produced by deletion of PAX 6 gen from the 11, p13 chromosome (Wilms Tumor) that involves the underdevelopment of the ocular globe.