This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Ophthalmology
[{'content': 'Fluoresciene stain is used in the eye to stain ? \nSelect and explain. \nA. Cornea, B. Retina, C. Choroid, D. Iris', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Cornea Impoant corneal examinations Keratometry, Corneal topography Specular microscopy Slit lamp Pachymeter Placido's disc Fluorescein, Alacian blue & Bengal rose stain Window reflex, slit lamp biomicroscopy, Placidos' disc Used for Curvature of cornea Corneal endothelial density Corneal opacity Thickness of cornea Corneal sheen Corneal staining Corneal surface", 'role': 'assistant'}]