A corneal ulcer is an open sore on the surface of the cornea, the clear front part of the eye. It can be caused by infections, injuries, or underlying health conditions. Symptoms often include redness, pain, blurred vision, and increased sensitivity to light. If left untreated, corneal ulcers can lead to serious complications, including vision loss. Treatment for corneal ulcers typically involves antibiotic or antifungal eye drops to fight infection. In some cases, doctors may recommend additional therapies, such as artificial tears or bandage contact lenses, to promote healing. Early diagnosis and proper care are essential for a good outcome.