_:vb50946949 "A corneal ulcer that has progressed and thinned the cornea such that the cornea ruptures, leaving a small hole that may drain or appear to contain pigment."^^ . _:vb50946949 . _:vb50946949 . _:vb50946949 "url:https://www.aao.org/eyenet/article/corneal-perforations"^^ . _:vb50946949 . _:vb50946949 .