Cogan Reese Syndrome: Causes, Symptoms, and Treatment
Written by Achuta Uppu, MD. Medically reviewed by Harsha Moole, MD, Internal Medicine. Last reviewed: October 2, 2026.
What kind of doctor treats Cogan Reese Syndrome?
An ophthalmologist, a medical doctor who specializes in eye care and eye surgery, is the main specialist for this condition. A primary care doctor can be the first stop for eye symptoms and can refer the patient to the right specialist, but a referral to an ophthalmologist is the usual path.
What is Cogan Reese syndrome?
Cogan Reese syndrome is a rare eye condition affecting the iris, the colored ring around the center of the eye, and the drainage system that keeps eye pressure normal. It belongs to a group of diseases called iridocorneal endothelial syndrome, often shortened to ICE syndrome, and an eye doctor called an ophthalmologist usually treats it.
Cogan Reese syndrome is one of three forms of iridocorneal endothelial syndrome, along with Chandler syndrome and progressive iris atrophy. Cells that line the inner surface of the cornea start to grow and spread where they should not. As these cells spread across the eye's drainage channels, fluid builds up and the pressure inside the eye rises. This raised pressure is a type of glaucoma, which can damage the nerve in the back of the eye.
Symptoms
Many people notice blurred vision in one eye, halos around lights, or eye discomfort. The pupil may look uneven or change shape, and raised eye pressure can slowly damage vision if not treated.
Causes and who gets it
The exact cause is not known. The abnormal cells come from the endothelium, the thin cell layer on the back of the cornea, and slowly spread over the iris and drainage channels. It is rare, mostly affects middle-aged adults, and appears more often in women than in men.
How doctors diagnose it
An ophthalmologist diagnoses it with a full eye exam, using a test called a slit lamp exam to look closely at the cornea, iris, and pupil. The doctor also measures the pressure inside the eye and checks the drainage angle.
Treatment
Treatment focuses on lowering eye pressure and protecting vision. Eye drops are often the first step; if they do not work well enough, laser treatment or surgery may be needed. Regular follow up visits matter because the condition can change slowly over time.
When to see a doctor
Anyone with blurred vision, eye pain, halos around lights, or a change in the shape of the pupil should see an eye doctor. Sudden eye pain with vision loss needs prompt care.
Common questions
Is Cogan Reese syndrome the same as Cogan syndrome?
No. Cogan syndrome is a rare condition that affects the eyes and inner ears. It causes dizziness and hearing problems. Cogan Reese syndrome is an eye condition involving the iris and eye pressure. The similar names cause a lot of confusion.
Will I go blind?
Many people keep useful vision, especially when the condition is found and treated early. Outcomes differ from person to person. Regular eye exams help protect sight over time.
Can it spread to my other eye?
The condition almost always affects only one eye. Doctors still check both eyes at every visit to be safe.
Is it hereditary?
Doctors have not found a pattern where parents pass it to children. Family members do not need special screening for it.
Sources
- NIH Genetic and Rare Diseases Information Center - Iridocorneal endothelial syndrome
- MedlinePlus - Glaucoma
- American Academy of Ophthalmology - Understanding Glaucoma: Symptoms, Causes, Diagnosis, Treatment
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.
