Aniridia: Causes, Symptoms, and Treatment
Medically reviewed by Harsha Moole, MD, Internal Medicine. Last reviewed: October 23, 2026.
What kind of doctor treats aniridia?
An ophthalmologist (eye doctor) manages aniridia, a condition present at birth where the colored part of the eye, called the iris, is missing or only partly formed. This can cause light sensitivity and vision problems, and regular eye exams watch for related issues like glaucoma. A primary care doctor can help coordinate other health checkups alongside the eye doctor.
What is aniridia?
Aniridia is a rare eye disorder. In it, the iris, the colored part of the eye that controls how much light enters, is partly or completely missing. It is typically present from birth and affects both eyes. The pupils may also be misshapen.
Aniridia can affect the eyes alone, or it can be part of a genetic syndrome such as WAGR syndrome or Gillespie syndrome. Injuries to the head or eyes can also cause aniridia. That type is not genetic and can happen at any age.
Symptoms
The missing or partly formed iris is the main sign. Other eye problems can also occur. Some are there at birth, and some develop later in life:
- Increased sensitivity to light (photophobia).
- Nystagmus, which means rapid, involuntary eye movements.
- Cataracts, a clouding of the lens of the eye, in most people with aniridia.
- Glaucoma, which means higher pressure inside the eye. It can start in late childhood through early adulthood.
- Cornea problems. The cornea is the clear outer covering of the eye.
- Foveal hypoplasia. The fovea is a small region at the back of the eye that gives sharp vision. If it is underdeveloped, vision is less sharp.
Many of these problems can cause vision loss that worsens over time, so regular eye exams matter.
Causes and who gets it
Aniridia affects 1 in 40,000 to 100,000 newborns worldwide. Most cases of isolated aniridia come from a change in the PAX6 gene, a gene that guides early eye development. In about two-thirds of cases, the changed gene is inherited from an affected parent. The other third are new changes that were not inherited.
Aniridia is inherited in an autosomal dominant pattern, which means one copy of the changed gene is enough to cause it. A parent with aniridia has a 50% chance of passing it to each child. It affects males and females equally.
How doctors diagnose it
An ophthalmologist can diagnose it based on the family history and a detailed physical and eye exam. Genetic testing can confirm it. This is a test that looks for a gene change that can cause aniridia, such as a change in the PAX6 gene. About two-thirds of people with isolated aniridia have other relatives with this condition. When no genetic cause is found, doctors check for related conditions. This includes kidney tumors in young children with new gene changes.
Treatment
Treatment is usually directed at improving and preserving vision. Medicines or surgery may help with glaucoma and cataracts. Contact lenses may help some patients. In 2018, the FDA approved the first artificial iris. This is a device placed in the eye during surgery. It is for adults and children with aniridia. It may reduce light sensitivity and glare. Genetic counseling is recommended.
Young children with aniridia need frequent eye exams, because some eye problems develop over time. When aniridia is part of WAGR syndrome, or when no genetic cause is found, kidney ultrasound checks are also part of care.
When to see a doctor
A baby born with missing or partly formed irises should see an eye doctor right away. Call 911 for a sudden change in vision or sudden, severe eye pain. See an eye doctor right away for milder eye pain or a sudden rise in light sensitivity. Pressure inside the eye can damage vision. Regular eye exams over time are part of care for aniridia.
How a direct primary care or concierge doctor fits in
A direct primary care doctor charges a flat monthly fee instead of billing insurance, while a concierge doctor usually charges more and often works alongside insurance. This doctor can order blood tests and track growth and general health. They can also keep your care organized between you, the eye doctor, and other specialists.
Common questions
Is aniridia genetic?
Yes, aniridia is usually caused by a change in a gene that controls eye development, and it can run in families or happen without any family history. An ophthalmologist can explain what genetic testing might involve and how the condition may affect other family members.
Can a direct primary care doctor manage aniridia?
A direct primary care doctor can help with general health and refer you to an ophthalmologist, who leads the diagnosis and ongoing eye care for aniridia. Because this condition needs specialized eye exams and monitoring for complications, an ophthalmologist stays closely involved in long-term care.
What health problems are linked to aniridia?
Aniridia can raise the risk of other eye problems, including glaucoma, cataracts and reduced central vision, and it is sometimes linked to conditions affecting other organs. Regular eye exams help catch problems early, and a doctor can check for related health concerns over time.
Sources
Medical Disclaimer
This content is for general educational and informational purposes only and is not medical advice. It is not a substitute for professional medical advice, diagnosis, or treatment, and reading it does not create a doctor-patient relationship. Always seek the advice of your physician or another qualified health provider with any questions about a medical condition, and never disregard or delay seeking professional advice because of something you read here. If you think you may have a medical emergency, call 911 (or your local emergency number) immediately.
