In<unk> , the ulceration may be punctate, which will lead to forming one large ulcer that involves most of the cornea but it often spares the periphery. When the beetle enters the eye and it is crushed, the released chemical, pederin, will cause an autocatalytic reaction which will result in corneal epithelial cell death and ulceration after only a few hours. On a molecular level, pederin will inhibit mitosis by disrupting DNA and protein synthesis. Overall it will induce an acute, necrotic reaction. It could be possible that the eye movements or rubbing during a person's sleep can lead to precipitating the situation.
Christmas eye
Surfer's ear
Corneal ulcer
Black eye
Lisch epithelial corneal dystrophy
Eye drop
Meesmann corneal dystrophy
Ocular larva migrans