<unk>  is an anomaly in the cornea resulting from damage to the corneal surface.  A<unk>  means that the cornea has been penetrated, thus leaving the cornea damaged.
The cornea is a clear part of the eye which controls and focuses the entry of light into the eye.  Damage to the cornea due to<unk>  can cause decreased visual acuity.
Corneal perforation
Corneal ulcer
Corneal injury
Orbital cellulitis
Corneal neovascularization
Ruptured globe
Endogenous endophthalmitis
Pitted keratolysis