title: Corneal press-on ruler for astigmatic keratotomy.
authors.forename: S P
authors.initials: SP
authors.lastname: Thornton
mesh_terms: D001251:Astigmatism / Q000601:surgery*; D006801:Humans; D007646:Keratotomy, Radial / Q000295:instrumentation*; D008751:Methylene Blue
chemical_list: D008751:Methylene Blue