What causes recurrent episodes of keratitis, and how should it be managed?
Nov 19, 2025
Source: Cainiu Health
Dr. Wang Lei
Introduction
In general, recurrent keratitis may be caused by excessive eye strain, insufficient tear secretion, bacterial keratitis, viral keratitis, or corneal ulcers such as Mooren's ulcer. It is important to develop good daily eye care habits, avoid rubbing the eyes with hands, wear protective goggles while swimming to prevent contaminated water from entering the eyes, and have regular eye examinations. Seek prompt medical attention if any discomfort occurs.
Generally, recurrent keratitis may be caused by factors such as eye strain, insufficient tear secretion, bacterial keratitis, viral keratitis, or Mooren's ulcer. Patients can choose appropriate measures based on their specific conditions. Detailed analysis is as follows:
1. Eye strain: Prolonged screen exposure keeps the cornea continuously exposed, accelerating tear film breakup and weakening the corneal barrier, making recurrence more likely. Reduce screen time, take a 5-minute break to look into the distance every 40 minutes, and ensure 8 hours of sleep daily.
2. Insufficient tear secretion: Reduced lacrimal gland function leads to decreased tear volume, leaving the cornea inadequately moisturized and protected, thus prone to irritation and inflammation. Apply warm compresses to the eyes three times daily for 10 minutes each, and use a humidifier indoors to maintain proper humidity levels.
3. Bacterial keratitis: Repeated bacterial infections damage the corneal epithelium; incomplete control of inflammation increases the risk of recurrence, often accompanied by redness, swelling, and increased eye discharge. Under medical guidance, use levofloxacin eye drops, tobramycin ointment, or cefazolin sodium eye drops.
4. Viral keratitis: The virus remains latent in the trigeminal ganglion and reactivates during periods of reduced immunity, invading the cornea and causing periodic recurrences. Under medical guidance, use acyclovir eye drops, ganciclovir ophthalmic gel, or foscarnet sodium eye drops. In severe cases, corneal transplantation may be required.
5. Mooren's ulcer: Abnormal immune responses attack corneal tissue, leading to progressive ulceration with high recurrence rates and potential blindness. Under medical guidance, use cyclophosphamide tablets, prednisolone eye drops, or cyclosporine eye drops. Lamellar keratoplasty (corneal transplant) is often necessary.
Maintain good eye hygiene in daily life—avoid rubbing your eyes; wear protective goggles when swimming to prevent contaminated water from entering the eyes; undergo regular eye examinations, and seek prompt medical attention if any discomfort occurs to protect corneal health.
