Overview
Chronic relapsing inflammatory optic neuritis (CRION) is a rare condition where the optic nerve — the nerve that carries visual signals from your eye to your brain — becomes inflamed repeatedly over time. Unlike a single episode of optic neuritis that many people recover from fully, CRION keeps coming back in flares, often causing worsening vision with each attack if not treated promptly. The condition is considered an autoimmune disease, meaning the body's own immune system mistakenly attacks the optic nerve. The main symptom is repeated episodes of vision loss, often in one or both eyes, sometimes accompanied by pain when moving the eyes. Between flares, some vision may return, but over time, permanent vision damage can build up. Some people with CRION may also have an underlying condition such as neuromyelitis optica spectrum disorder (NMOSD) or other autoimmune diseases, so doctors often run tests to check for these. Treatment focuses on stopping inflammation quickly during attacks and preventing future flares. High-dose steroids are typically used during acute episodes, and long-term immunosuppressive medications are often needed to reduce the risk of relapse. Early diagnosis and consistent treatment are very important to protect vision over the long term.
Also known as:
Key symptoms:
Sudden or gradual vision loss in one or both eyesPain behind the eye or when moving the eyeBlurred or foggy visionLoss of color vision, especially reds and greensDim or darkened visionRecurring episodes of vision problems after partial recoverySensitivity to lightLoss of central visionVisual field defects (blind spots)
Sporadic
Usually appears on its own, not inherited from a parent
Adult
Begins in adulthood (age 18 or older)
Treatments
1 availableTOBRADEX ST
TOBRADEX ST ophthalmic suspension is indicated for steroid-responsive inflammatory ocular conditions for which a corticosteroid is indicated and where superficial bacterial ocular infection or a risk …
TOBRADEX ST ophthalmic suspension is indicated for steroid-responsive inflammatory ocular conditions for which a corticosteroid is indicated and where superficial bacterial ocular infection or a risk of bacterial ocular infection exists.
Clinical Trials
View all trials with filters →No actively recruiting trials found for Chronic relapsing inflammatory optic neuritis at this time.
New trials open frequently. Follow this disease to get notified.
Treatment Centers
8 centersBaylor College of Medicine Rare Disease Center ↗
Baylor College of Medicine
📍 Houston, TX
🏥 NORDStanford Medicine Rare Disease Center ↗
Stanford Medicine
📍 Stanford, CA
🔬 UDNNIH Clinical Center Undiagnosed Diseases Program ↗
National Institutes of Health
📍 Bethesda, MD
🔬 UDNUCLA UDN Clinical Site ↗
UCLA Health
📍 Los Angeles, CA
🔬 UDNBaylor College of Medicine UDN Clinical Site ↗
Baylor College of Medicine
📍 Houston, TX
🔬 UDNHarvard/MGH UDN Clinical Site ↗
Massachusetts General Hospital
📍 Boston, MA
🏥 NORDMayo Clinic Center for Individualized Medicine ↗
Mayo Clinic
📍 Rochester, MN
👤 Mayo Clinic Center for Individualized Medicine
🏥 NORDUCLA Rare Disease Day Program ↗
UCLA Health
📍 Los Angeles, CA
Travel Grants
No travel grants are currently matched to Chronic relapsing inflammatory optic neuritis.
Community
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Start the conversation →Latest news about Chronic relapsing inflammatory optic neuritis
1 articlesCaregiver Resources
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Family & Caregiver Grants
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Social Security Disability
Learn how rare disease patients may qualify for SSDI/SSI benefits.
Questions for your doctor
Bring these to your next appointment
- Q1.How certain are you that I have CRION, and what tests were used to confirm this diagnosis?,Should I be tested for AQP4 or MOG antibodies, and how would the results change my treatment?,What long-term medication do you recommend to prevent relapses, and what are the risks and side effects?,How quickly should I seek emergency care if I notice my vision getting worse, and who should I contact?,What is the realistic outlook for my vision over the next 5 to 10 years with treatment?,Are there any clinical trials I might be eligible for?,Should I see a low-vision specialist now, or wait to see how my vision responds to treatment?
Common questions about Chronic relapsing inflammatory optic neuritis
What is Chronic relapsing inflammatory optic neuritis?
Chronic relapsing inflammatory optic neuritis (CRION) is a rare condition where the optic nerve — the nerve that carries visual signals from your eye to your brain — becomes inflamed repeatedly over time. Unlike a single episode of optic neuritis that many people recover from fully, CRION keeps coming back in flares, often causing worsening vision with each attack if not treated promptly. The condition is considered an autoimmune disease, meaning the body's own immune system mistakenly attacks the optic nerve. The main symptom is repeated episodes of vision loss, often in one or both eyes, so
How is Chronic relapsing inflammatory optic neuritis inherited?
Chronic relapsing inflammatory optic neuritis follows a sporadic inheritance pattern. Genetic counseling can help families understand recurrence risk and testing options.
At what age does Chronic relapsing inflammatory optic neuritis typically begin?
Typical onset of Chronic relapsing inflammatory optic neuritis is adult. Age of onset can vary across affected individuals.
Which specialists treat Chronic relapsing inflammatory optic neuritis?
1 specialists and care centers treating Chronic relapsing inflammatory optic neuritis are listed on UniteRare, sourced from ClinicalTrials.gov principal investigators, published research, and the NPPES NPI registry.