Ulcerative keratitis.
Chronic arterial infection and sloughing off of necrotic tissue.
An open sore on the transparent outer covering of the eye (cornea). Signs and symptoms include impaired vision, severe pain, redness, a visible white patch on the cornea, sensitivity to light, and increased tearing. Corneal ulcers usually arise from infection by bacteria, often through contamination of an injury to the cornea.
A corneal ulcer refers to a disruption, erosion, or open sore in the cornea. Typically, it affects the outer layer of the cornea, although in certain instances, it may extend deeper into the middle layer.
Corneal ulcers often stem from a corneal abrasion. However, they can also be caused by chemical injury, as well as infections resulting from bacteria, fungi, or viruses (especially the herpes virus). Certain eye conditions like keratoconjunctivitis sicca (dry eye syndrome) and eyelid deformities such as entropion or ectropion can heighten the risk of developing a corneal ulcer.
Fluorescein dye is employed to detect the presence of ulcers in the eye. Treatment for infections and underlying eye conditions varies based on their specific cause. Superficial, noninfectious ulcers typically heal swiftly; however, if healing does not occur as expected, they may be managed using a “bandage” contact lens or through a temporary procedure called tarsorrhaphy, which involves sealing the eyelids together.