Dellen

Dellen
		SYMPTOMS	Foreign body sensation \| Often asymptomatic
		SIGNS	An area of corneal thinning/excavation adjacent to corneal elevation - usually around the limbus \| Injection
		WORK-UP	Thorough history. Slit lamp examination with NaFl dye
		TREATMENT	Preservative-free artificial tears q2-4h \| Lubricating ointment at night \| Surgical removal/repair of the lesion may be indicated
		FOLLOW-UP	Every couple of days during treatment
		ADDITIONAL LAB \| TESTS	None
		ETIOLOGY	Many conditions of limbal elevation may cause corneal dellen, including: Filtering blebs \| Pterygium \| Pinguecula \| Trauma
		DIFFERENTIAL DX	Peripheral ulcerative keratitis \| Infectious keratitis \| Limbal stem cell deficiency
		NOTES	Dellen are a result of tear film disturbance \| Rarely, corneal perforation and scarring may result