Best eyecare near you A corneal ulcer is often caused by infections from bacteria, viruses, fungi, or parasites, commonly due to contact lens misuse or eye trauma. Signs and symptoms include severe eye pain, redness, blurred vision, tearing, and sensitivity to light. If untreated, it can lead to vision loss. Treatment options include antibiotic, antifungal, or antiviral eye drops, depending on the cause. For severe cases, surgery may be needed. Visit us at Dr. Maria's Eye Clinic in Saligramam, Chennai, near Vadapalani, Virugambakkam, Valasaravakkam, KK Nagar, and Koyembedu for expert care.