title: Keratoconus. Square keratoplasty using Bard-Parker knife.
mesh_terms: D016039:Corneal Transplantation; D006801:Humans; D007640:Keratoconus / Q000473:pathology / Q000601:surgery*; D008722:Methods; D009885:Ophthalmology / Q000295:instrumentation; D013525:Surgical Instruments; D014184:Transplantation, Homologous