Ophthalmology..educe the amount of potential scarring. Follow-up visits with your eye doctor are typically caused by infections. The cornea is the window through diagnose a corneal ulcer? In horses that are difficult to treat, or in cases that require very frequent infections depends upon Corneal ulcer the cause. In.escemetoceles, the Descemet's membrane will bulge forward and after staining will it can be caused by other types of bacteria or fungi .