The cornea covers the iris and the pupil and accounts for approximately two-thirds of the eye’s total focusing power. If the cornea becomes infected, injured, or extremely irritated, an open sore may form, which is referred to as a corneal ulcer.
A corneal ulcer usually results from an eye infection, either bacterial, viral, or fungal. Improper use of contact lenses or scratches on the eye can lead to bacterial and fungal infections that then evolve into corneal ulcers. In addition, severe dry eye syndrome or an eyelid disorder that prevents proper eyelid function and causes the cornea to dry out can also cause open sores. (more…)