<prompt> Fluoresciene stain is used in the eye to stain ?CorneaRetinaChoroidIris  <response>: Ans. is a i.e., Cornea Impoant corneal examinations Keratometry, Corneal topography Specular microscopy Slit lamp Pachymeter Placidos 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 