Overview
Idiopathic linear interstitial keratitis is a very rare eye condition that affects the cornea, which is the clear, dome-shaped front surface of the eye. In this disease, inflammation develops within the middle layers of the cornea (called the stroma), forming characteristic line-shaped or linear patterns of cloudiness. The term 'idiopathic' means that the cause is unknown — it is not linked to infections, autoimmune diseases, or other identifiable triggers that can sometimes cause interstitial keratitis. Patients may notice blurred vision, eye redness, light sensitivity (photophobia), tearing, and discomfort or mild pain in the affected eye. The condition can affect one or both eyes. Because the inflammation sits within the deeper layers of the cornea rather than on the surface, it can be harder to detect without a thorough eye examination using a slit lamp. Treatment is generally aimed at controlling the inflammation and preserving vision. Topical corticosteroid eye drops are the most commonly used therapy to reduce corneal inflammation. In some cases, the condition may be self-limiting, but recurrences can occur. If scarring develops in the cornea over time, it may lead to more permanent vision changes. Because this condition is so rare, there are no large clinical trials or specific approved therapies dedicated to it, and management is guided by expert ophthalmologic opinion and experience with similar corneal inflammatory conditions.
Key symptoms:
Blurred or hazy visionEye rednessSensitivity to light (photophobia)Eye pain or discomfortTearing or watery eyesLinear or line-shaped cloudy areas on the corneaFeeling of something in the eyeGradual vision loss if scarring developsCorneal swelling
Variable
Can begin at different ages, from infancy through adulthood
Treatments
No FDA-approved treatments are currently listed for Idiopathic linear interstitial keratitis.
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Specialists
View all specialists →No specialists are currently listed for Idiopathic linear interstitial keratitis.
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 Idiopathic linear interstitial keratitis.
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1 articlesCaregiver Resources
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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.What is causing the inflammation in my cornea, and how certain are you that no underlying cause has been missed?,How long will I need to use corticosteroid eye drops, and what are the risks of long-term use?,How often should I have follow-up eye exams to monitor for scarring or complications?,Are there signs I should watch for that would require urgent medical attention?,Is there a risk that this condition could affect my other eye?,If scarring develops, would I be a candidate for a corneal transplant?,Are there any newer treatments or clinical trials I should know about?
Common questions about Idiopathic linear interstitial keratitis
What is Idiopathic linear interstitial keratitis?
Idiopathic linear interstitial keratitis is a very rare eye condition that affects the cornea, which is the clear, dome-shaped front surface of the eye. In this disease, inflammation develops within the middle layers of the cornea (called the stroma), forming characteristic line-shaped or linear patterns of cloudiness. The term 'idiopathic' means that the cause is unknown — it is not linked to infections, autoimmune diseases, or other identifiable triggers that can sometimes cause interstitial keratitis. Patients may notice blurred vision, eye redness, light sensitivity (photophobia), tearing,