This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: FMGE 2019, Subject name: Anatomy
Fleischer's ring is seen in; 
Select and explain. 
A. Keratoconus, B. Keratomalacia, C. Keratoglobus, D. Trachoma
A: Keratoconus
Answer: A: Keratoconus 
Explanation: KERATOCONUS Non -Inflammatory central corneal thinning Young male with constantly changing power of glasses with myopia & high cylinder SIGNS IN KERATOCONUS Munson sign. Scissor reflex on retinoscopy (Earliest Clinical Sign) Enlarged corneal nerves-lower lid indentation on downgaze. Oil droplet reflex. Rizutti's sign Acute Hydrops - aqueous accumulated in stroma Fleischer ring-Paial or complete iron deposition ring in deep epithelium encircling the base of the cone. Characteristic in eyes with keratoconus.