Corneal Ulcer
A corneal ulcer is an open sore on the cornea. The cornea covers the iris and the round pupil, much like a watch crystal covers the face of a watch. A corneal ulcer usually results from an eye infection, but severe dry eye or other eye disorders can cause it.
![](https://associateseyecare.com/wp-content/uploads/2018/04/corneal-ulcer.jpg)