Lamellar keratoplasty in corneal ectasias.
D001251:Astigmatism; D016039:Corneal Transplantation; D006801:Humans; D007640:Keratoconus / Q000601:surgery*; D011183:Postoperative Complications; D012029:Refraction, Ocular; D014184:Transplantation, Homologous; D014792:Visual Acuity