This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cornea and sclera, Subject name: Ophthalmology
[{'content': 'Band shaped keratopathy is caused by- \nSelect and explain. \nA. Amyloid, B. CalcIum, C. Monopolysaccharide, D. Lipid', 'role': 'user'}, {'content': "Answer: B \nExplanation: Calcific degeneration (Band Shape keratopathy)Band shape keratopathy (BSK) is essentially adegenerative change associated with deposition ofcalcium salts in Bowman's membrane, most superficialpa of stroma and in deeper layers of epithelium. Etiology \x01 Ocular diseases. Band keratopathy is seen in association with: chronic uveitis in adults, children with Still's disease, phthisis bulbi, chronic glaucoma, chronic keratitis and ocular trauma. \x01 Age related BSK is common and affects otherwise healthy cornea. \x01 Metabolic conditions rarely associated with BSK include hypercalcaemia and chronic renal failure. REF:Comprehensive ophthalmology,4th edition,pg no.116", 'role': 'assistant'}]