This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cornea, Subject name: Ophthalmology
KF ring in Wilson's disease is seen at the level of: 
Select and explain. 
A. Descemet's membrane, B. Epithelium, C. Endothelium, D. Stroma
A: Descemet's membrane
Answer: A: Descemet's membrane 
Explanation: Ans: A (Descemet's membrane) Ref: BASAK Essentials of Ophthalmology. 5th edition, pg no 163Explanation: (See the following table)In KF ring, the copper deposits are seen in the vertical meridian (6 &12o'clock position) in the early stages.It is seen in all Wilson's patients if CNS is involvedWith penicillamine therapy . it disappears.Other manifestations of Wilson's disease are sunflower cataract & defective accommodation.