Severe forms of Vernal Keratoconjunctivitis can present with corneal manifestations which start as punctate epithelial erosions followed by macro erosions which coalesce into shield ulcers
They are characteristically present in the superior cornea (suggestive of a mechanical cause due to the large papillae) and can be sight threatening.
Simple scraping of base and margins of the ulcer with removal of the inflammatory plaque like material will promote re-epithelialisation.
Image from Rajan Eye Care Hospital
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Image from Rajan Eye Care Hospital.