title: Astigmatism analysis: the spectrum of approaches.
authors.forename: Douglas D
authors.initials: DD
authors.lastname: Koch
mesh_terms: D001251:Astigmatism / Q000175:diagnosis* / Q000209:etiology / Q000517:prevention & control; D002387:Cataract Extraction / Q000009:adverse effects; D003315:Cornea / Q000473:pathology / Q000601:surgery*; D003941:Diagnostic Techniques, Ophthalmological; D006801:Humans