title: Ocular higher-order wavefront aberration caused by major tilting of intraocular lens.
abstract: OBJECTIVE
  To report a patient with a significant amount of ocular coma-like aberration that was caused by the tilting of an intraocular lens (IOL) who was treated successfully by IOL repositioning surgical procedure.
  
  
  METHODS
  Interventional case report.
  
  
  METHODS
  At the Department of Ophthalmology, University of Tsukuba, a 52-year-old man complained of unclear and distorted vision in his left pseudophakic eye. The tilt and decentration of IOL were measured with the Scheimpflug videophotography system. Ocular and corneal wavefront aberrations were measured with the Hartmann-Schack aberrometer.
  
  
  RESULTS
  The tilting angle was 28.87 degrees, and decentration was 1.78 mm. The ocular coma-like aberration was increased remarkably to 0.451 microm at 4.0 mm aperture diameter, and the simulated retinal image of a Landolt ring was blurred substantially. Ocular spheric-like, corneal coma-like, and corneal spheric-like aberrations were not increased. The IOL repositioning surgery significantly improved the IOL tilt, which resulted in the reduction of ocular coma-like aberration, recovery of simulated retinal image, and resolution of the patient's complaints.
  
  
  CONCLUSIONS
  Major IOL tilting induces a large amount of ocular coma-like aberration, which deteriorates the patient's quality of vision.
authors.affiliation: Department of Ophthalmology, Institute of Clinical Medicine, University of Tsukuba, Tennoudai, Ibaraki, Japan. toshika@md.tsukuba.ac.jp
authors.forename: Tetsuro
authors.initials: T
authors.lastname: Oshika
authors.forename: Keisuke
authors.initials: K
authors.lastname: Kawana
authors.forename: Takahiro
authors.initials: T
authors.lastname: Hiraoka
authors.forename: Yuichi
authors.initials: Y
authors.lastname: Kaji
authors.forename: Takahiro
authors.initials: T
authors.lastname: Kiuchi
mesh_terms: D001251:Astigmatism / Q000175:diagnosis / Q000209:etiology*; D019781:Corneal Topography; D005548:Foreign-Body Migration / Q000150:complications* / Q000601:surgery; D006801:Humans; D019654:Lens Implantation, Intraocular; D007910:Lenses, Intraocular; D008297:Male; D008875:Middle Aged; D018918:Phacoemulsification; D011475:Prosthesis Failure; D012086:Reoperation; D014741:Video Recording; D014792:Visual Acuity