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': 'Salmon patch is seen in - \nSelect and explain. \nA. Interstitial keratitis, B. Disciform keratitis, C. Acne rosacea, D. Phlectenular keratitis', 'role': 'user'}, {'content': "Answer: A \nExplanation: Interstitial keratitis denotes an inflammation of thecorneal stroma without primary involvement of theepithelium or endothelium. The clinical picture of interstitial keratitis can bedivided into three stages: initial progressive stage,florid stage and stage of regression. salmon's patch seen in Florid stage. Florid stage. In this stage eye remains acutelyinflamed. Deep vascularization of cornea, consistingof radial bundle of brush-like vessels develops. Sincethese vessels are covered by hazy cornea, they lookdull reddish pink which is called 'Salmon patchappearance'. REF:Comprehensive ophthalmology,4th edition,pg no.114", 'role': 'assistant'}]