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What is Corneal deposits are seen in all except – and explain in detail?
Endothelial dystrophies cause corneal deposits (not epithelial dystrophies like Reis - Buckler's dystrophy).
Hunter's syndrome and Hurler syndrome are mucopolysaccharidosis:-

"In all the mucopolysacharidosis (except MPS III - Sanfilipoo syndrome), corneal deposition may occur". — Pediatric Ophthalmology