title: Conductive keratoplasty for the treatment of astigmatism induced by corneal trauma or incision.
abstract: OBJECTIVE
  To assess the efficacy, safety, and predictability of conductive keratoplasty for the treatment of corneal trauma/incision-induced hyperopic or compound astigmatism.
  
  
  METHODS
  Thirteen eyes with corneal trauma/incision-induced astigmatism underwent conductive keratoplasty in this prospective study. The main outcome measures included distance uncorrected visual acuity (UCVA), near UCVA, best spectacle-corrected visual acuity (BSCVA), manifest refraction cylinder, keratometric astigmatism, manifest refraction spherical equivalent (MRSE), contrast sensitivity, glare sensitivity, intraocular pressure, tear break-up time, endothelial cell count, and pachymetry. Patients were followed 1 week and 1, 3, and 6 months postoperatively.
  
  
  RESULTS
  Mean logMAR scores for distance UCVA, near UCVA, and BSCVA significantly improved from 0.87+/-0.31, 1.32+/-0.41, and 0.18+/-0.18, respectively, to 0.32+/-0.21, 0.59+/-0.21, and 0.08+/-0.11 (P<or=.05), respectively, 6 months after conductive keratoplasty. Mean manifest refraction cylinder, keratometric astigmatism, and MRSE significantly reduced from 4.12+/-2.86 diopters (D), 4.15+/-2.40 D, and 0.73+/-2.56 D, respectively, to 1.46+/-1.35 D, 1.66+/-1.44 D, and -0.52+/-0.99 D (P<or=.05), respectively, at 6 months postoperatively. Contrast sensitivity and glare sensitivity showed significant improvement at spatial frequencies of 1, 1.6, 2.5, 4, and 6.3 cycles per degree (P<or=.05). Surgically induced astigmatism calculated by vector analysis highly correlated to target induced astigmatism (P<or=.05). No severe complications occurred postoperatively.
  
  
  CONCLUSIONS
  This study suggests that conductive keratoplasty is an effective and safe treatment for hyperopic or compound astigmatism after corneal trauma or incision.
authors.affiliation: Eye Center, Second Affiliated Hospital, Zhejiang University, Hangzhou, China. xuwenhz2002@yahoo.com.cn
authors.forename: Wen
authors.initials: W
authors.lastname: Xu
authors.forename: Panpan
authors.initials: P
authors.lastname: Ye
authors.forename: Ke
authors.initials: K
authors.lastname: Yao
authors.forename: Jin
authors.initials: J
authors.lastname: Ma
authors.forename: Hesheng
authors.initials: H
authors.lastname: Xu
mesh_terms: D000328:Adult; D000368:Aged; D001251:Astigmatism / Q000209:etiology / Q000601:surgery*; D003315:Cornea / Q000601:surgery; D065306:Corneal Injuries; D005131:Eye Injuries / Q000150:complications* / Q000601:surgery; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D015948:Keratoplasty, Penetrating / Q000379:methods*; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D012029:Refraction, Ocular; D016896:Treatment Outcome; D014792:Visual Acuity; D055815:Young Adult