title: Corneal coma and trefoil changes associated with incision location in cataract surgery.
abstract: OBJECTIVE
  To investigate changes in corneal higher-order aberrations (HOAs) associated with the incision location in cataract surgery.
  
  
  METHODS
  Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea.
  
  
  METHODS
  Observational case series.
  
  
  METHODS
  Eyes were divided into 3 groups according to the different axes of incision location: superior, temporal, and nasal. Preoperative and 1-month postoperative corneal coma, trefoil, and spherical aberrations were compared.
  
  
  RESULTS
  The study evaluated 119 eyes that had uneventful cataract surgery with a 2.2 mm limbal incision. The superior incision group showed significant changes in the vertical coma (amount of change: -0.119 μm ± 0.153 [SD]; P < .001) and vertical trefoil (amount of change: 0.185 ± 0.260 μm, P = .001). The nasal incision group showed a significant change in oblique trefoil (amount of change: 0.176 ± 0.207 μm; P < .001). The temporal incision group did not show significant changes in HOAs.
  
  
  CONCLUSIONS
  The superior incision in 2.2 mm phacoemulsification cataract surgery caused a change in the corneal vertical coma in a negative direction. Corneal trefoil changes were dependent on the incision location.
  
  
  BACKGROUND
  No author has a financial or proprietary interest in any material or method mentioned.
authors.affiliation: From the Department of Ophthalmology (Song), Hanyang University College of Medicine, Hanyang University Medical Center, the Department of Ophthalmology (Jong H. Park, Jin H. Park, J.Y. Kim, M.J. Kim, Tchah), University of Ulsan College of Medicine, Asan Medical Center, and the Department of Ophthalmology (Yoon), Kangdong Sacred Heart Hospital, Hallym University College of Medicine, Seoul, South Korea.
authors.forename: In Seok
authors.initials: IS
authors.lastname: Song
authors.affiliation: From the Department of Ophthalmology (Song), Hanyang University College of Medicine, Hanyang University Medical Center, the Department of Ophthalmology (Jong H. Park, Jin H. Park, J.Y. Kim, M.J. Kim, Tchah), University of Ulsan College of Medicine, Asan Medical Center, and the Department of Ophthalmology (Yoon), Kangdong Sacred Heart Hospital, Hallym University College of Medicine, Seoul, South Korea.
authors.forename: Jong Hoon
authors.initials: JH
authors.lastname: Park
authors.affiliation: From the Department of Ophthalmology (Song), Hanyang University College of Medicine, Hanyang University Medical Center, the Department of Ophthalmology (Jong H. Park, Jin H. Park, J.Y. Kim, M.J. Kim, Tchah), University of Ulsan College of Medicine, Asan Medical Center, and the Department of Ophthalmology (Yoon), Kangdong Sacred Heart Hospital, Hallym University College of Medicine, Seoul, South Korea.
authors.forename: Jin Hyoung
authors.initials: JH
authors.lastname: Park
authors.affiliation: From the Department of Ophthalmology (Song), Hanyang University College of Medicine, Hanyang University Medical Center, the Department of Ophthalmology (Jong H. Park, Jin H. Park, J.Y. Kim, M.J. Kim, Tchah), University of Ulsan College of Medicine, Asan Medical Center, and the Department of Ophthalmology (Yoon), Kangdong Sacred Heart Hospital, Hallym University College of Medicine, Seoul, South Korea.
authors.forename: Sam Young
authors.initials: SY
authors.lastname: Yoon
authors.affiliation: From the Department of Ophthalmology (Song), Hanyang University College of Medicine, Hanyang University Medical Center, the Department of Ophthalmology (Jong H. Park, Jin H. Park, J.Y. Kim, M.J. Kim, Tchah), University of Ulsan College of Medicine, Asan Medical Center, and the Department of Ophthalmology (Yoon), Kangdong Sacred Heart Hospital, Hallym University College of Medicine, Seoul, South Korea.
authors.forename: Jae Yong
authors.initials: JY
authors.lastname: Kim
authors.affiliation: From the Department of Ophthalmology (Song), Hanyang University College of Medicine, Hanyang University Medical Center, the Department of Ophthalmology (Jong H. Park, Jin H. Park, J.Y. Kim, M.J. Kim, Tchah), University of Ulsan College of Medicine, Asan Medical Center, and the Department of Ophthalmology (Yoon), Kangdong Sacred Heart Hospital, Hallym University College of Medicine, Seoul, South Korea.
authors.forename: Myoung Joon
authors.initials: MJ
authors.lastname: Kim
authors.affiliation: From the Department of Ophthalmology (Song), Hanyang University College of Medicine, Hanyang University Medical Center, the Department of Ophthalmology (Jong H. Park, Jin H. Park, J.Y. Kim, M.J. Kim, Tchah), University of Ulsan College of Medicine, Asan Medical Center, and the Department of Ophthalmology (Yoon), Kangdong Sacred Heart Hospital, Hallym University College of Medicine, Seoul, South Korea. Electronic address: hwtchah@amc.seoul.kr.
authors.forename: Hungwon
authors.initials: H
authors.lastname: Tchah
mesh_terms: D057128:Aberrometry; D000368:Aged; D001251:Astigmatism / Q000503:physiopathology*; D003315:Cornea / Q000503:physiopathology / Q000601:surgery*; D057108:Corneal Wavefront Aberration / Q000503:physiopathology*; D005260:Female; D006801:Humans; D019654:Lens Implantation, Intraocular; D008297:Male; D008875:Middle Aged; D018918:Phacoemulsification; D019591:Pseudophakia / Q000503:physiopathology*; D012189:Retrospective Studies