Problem cases in astigmatism following penetrating keratoplasty and hyperopic epikeratoplasty.
D001251:Astigmatism / Q000209:etiology* / Q000628:therapy; D016039:Corneal Transplantation / Q000009:adverse effects* / Q000379:methods; D006801:Humans; D015948:Keratoplasty, Penetrating / Q000009:adverse effects