title: Corneal Wavefront Aberrations After Primary and Recurrent Pterygium Surgery.
abstract: OBJECTIVE
  To evaluate the effect of primary and recurrent pterygium surgery on corneal wavefront aberrations.
  
  
  METHODS
  This prospective and interventional study included the 47 eyes of 47 patients with primary pterygium (primary group) and 41 eyes of 41 patients with recurrent pterygium (recurrent group). All patients underwent pterygium excision with conjunctival autograft transplantation. Corneal wavefront aberrations were measured using Sirius corneal topography and aberrometry system (Costruzione Strumenti Oftalmici, Florence, Italy) before surgery and at 3 and 12 months after surgery. The main outcome measures were root mean square values of total wavefront error (WFE), higher-order aberrations (HOAs), coma, trefoil, and spherical aberrations.
  
  
  RESULTS
  Corneal wavefront aberrations were not significantly different between the primary and recurrent groups at baseline (P>0.05). Total WFE, HOA, trefoil, and coma decreased significantly in both primary and recurrent groups at postoperative 3 and 12 months compared with preoperative measurements (P<0.05). The mean spherical aberration was not significantly changed at 3 and 12 months compared with preoperative measurements (P>0.05). Total WFE, HOA, trefoil, and coma were significantly higher in the recurrent group than in the primary group at postoperative 3 and 12 months (P<0.05).
  
  
  CONCLUSIONS
  Pterygium surgery can significantly reduce corneal wavefront aberrations, including total WFE, HOA, trefoil, and coma in eyes with primary or recurrent pterygium. However, postoperative corneal aberrations were higher in the recurrent group than in the primary group.
authors.affiliation: Department of Ophthalmology (E.B.O., K.I.C., T.K., I.Y., A.D.), Beyoglu Eye Research and Training Hospital, Istanbul, Turkey; Department of Ophthalmology (N.K.), Gaziantep University School of Medicine, Gaziantep, Turkey; Department of Ophthalmology (B.I.S.A.), Umraniye Training and Research Hospital, Istanbul, Turkey; and Department of Ophthalmology (A.D.), Istanbul Medeniyet University Medical School, Istanbul, Turkey.
authors.forename: Engin Bilge
authors.initials: EB
authors.lastname: Ozgurhan
authors.forename: Necip
authors.initials: N
authors.lastname: Kara
authors.forename: Kadir Ilker
authors.initials: KI
authors.lastname: Cankaya
authors.forename: Betul Ilkay
authors.initials: BI
authors.lastname: Sezgin Akcay
authors.forename: Tugba
authors.initials: T
authors.lastname: Kurt
authors.forename: Ihsan
authors.initials: I
authors.lastname: Yilmaz
authors.forename: Ahmet
authors.initials: A
authors.lastname: Demirok
mesh_terms: D057128:Aberrometry / Q000379:methods; D000328:Adult; D003228:Conjunctiva / Q000637:transplantation*; D019781:Corneal Topography / Q000379:methods; D057108:Corneal Wavefront Aberration / Q000503:physiopathology*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D013508:Ophthalmologic Surgical Procedures; D011446:Prospective Studies; D011625:Pterygium / Q000601:surgery*; D012008:Recurrence; D014792:Visual Acuity