title: Corneal topographic changes after transconjunctival (25-gauge) sutureless vitrectomy.
abstract: OBJECTIVE
  To evaluate the topographic changes in the cornea after pars plana vitrectomy (PPV) with 25-gauge transconjunctival sutureless vitrectomy (TSV) system.
  
  
  METHODS
  Prospective, interventional case series.
  
  
  METHODS
  In this prospective study, we evaluated the topographic changes of the cornea in 32 eyes of 32 patients who underwent PPV with the 25-gauge TSV system. The topographic parameters that were analyzed statistically were the average corneal power, corneal surface cylinder, surface asymmetry index, and surface regularity index. Mean induced astigmatism was estimated by vector analysis software. Wilcoxon test was used for statistical analysis.
  
  
  RESULTS
  There was no significant change in average corneal power, corneal surface cylinder, surface asymmetry index, and surface regularity index parameters at first day, first week, and first month after the operation. Mean induced astigmatism was 0.38 diopters at 15 degrees.
  
  
  CONCLUSIONS
  Corneal surface and astigmatic changes were observed to be insignificant in the early postoperative period after PPV with the 25-gauge TSV system.
authors.affiliation: Department of Ophthalmology, Haydarpasa Numune Education and Research Hospital, Istanbul, Turkey. ayanyali@hotmail.com
authors.forename: Ates
authors.initials: A
authors.lastname: Yanyali
authors.forename: Erkan
authors.initials: E
authors.lastname: Celik
authors.forename: Fatih
authors.initials: F
authors.lastname: Horozoglu
authors.forename: Ahmet F
authors.initials: AF
authors.lastname: Nohutcu
mesh_terms: D000368:Aged; D001251:Astigmatism / Q000209:etiology* / Q000503:physiopathology; D003228:Conjunctiva; D003315:Cornea / Q000473:pathology*; D019781:Corneal Topography; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009339:Needles; D011183:Postoperative Complications; D011446:Prospective Studies; D012029:Refraction, Ocular / Q000502:physiology; D012164:Retinal Diseases / Q000601:surgery; D013536:Suture Techniques; D014792:Visual Acuity / Q000502:physiology; D014821:Vitrectomy / Q000379:methods*