title: Window cross and Plácido disc.
authors.affiliation: Dr. Murube is Professor of Ophthalmology, Univesity of Alcalá, Spain.
authors.forename: Juan
authors.initials: J
authors.lastname: Murube
mesh_terms: D003941:Diagnostic Techniques, Ophthalmological / Q000266:history* / Q000295:instrumentation; D005128:Eye Diseases / Q000175:diagnosis / Q000266:history*; D049672:History, 19th Century; D006801:Humans