title: Preoperative anterior segment optical coherence tomography as a predictor of postoperative phakic intraocular lens position.
abstract: OBJECTIVE
  To evaluate anterior segment optical coherence tomography (AS-OCT) in the preoperative simulation of postoperative iris-fixated phakic intraocular lens (pIOL) position in the anterior chamber.
  
  
  METHODS
  Farabi Eye Research Center, Department of Ophthalmology, Tehran University of Medical Sciences, Tehran, Iran.
  
  
  METHODS
  Case series.
  
  
  METHODS
  Using AS-OCT, the pIOL position was simulated preoperatively in 2 ways and compared with the actual postoperative pIOL position. For preoperative evaluations, the simulator was placed on the posterior pigmented epithelium of the iris. Then, the simulation was performed with the simulator placed in the middle of the iris tissue. The following distances were measured: from the center of the pIOL to the endothelium, from the edge of the pIOL to the endothelium, and from the posterior surface of the pIOL to the crystalline lens.
  
  
  RESULTS
  The study examined 26 eyes (16 patients). Although all distances in both simulation methods (except the lens vault in the first method of simulation) were highly correlated (all P<.009), only the results with the simulator placed in the middle of the iris tissue were not statistically different from the corresponding postoperative measurements (P=.209 and P=.564 for distance from endothelium to the center and the pIOL edge, respectively).
  
  
  CONCLUSIONS
  Using the pIOL template of the AS-OCT system for preoperative simulation of iris-fixated pIOLs improved the criteria for patient selection for implantation of these pIOLs. The simulator should be placed in the middle of the iris tissue for preoperative simulation.
  
  
  BACKGROUND
  No author has a financial or proprietary interest in any material or method mentioned.
authors.affiliation: From the Department of Ophthalmology (Tafti, Beheshtnejad, Jabbarvand, Mohebi, Zarei-Ghanavati), Tehran University of Medical Sciences, Tehran, and the Guilan University of Medical Sciences (Soltani Moghadam), Rasht, Iran.
authors.forename: Mohammad Reza
authors.initials: MR
authors.lastname: Fallah Tafti
authors.forename: Reza Soltani
authors.initials: RS
authors.lastname: Moghadam
authors.forename: Amir Houshang
authors.initials: AH
authors.lastname: Beheshtnejad
authors.forename: Mahmoud
authors.initials: M
authors.lastname: Jabbarvand
authors.forename: Masoomeh
authors.initials: M
authors.lastname: Mohebi
authors.forename: Mehran
authors.initials: M
authors.lastname: Zarei-Ghanavati
mesh_terms: D000328:Adult; D000869:Anterior Eye Segment / Q000473:pathology* / Q000601:surgery; D003198:Computer Simulation; D003941:Diagnostic Techniques, Ophthalmological; D004728:Endothelium, Corneal / Q000473:pathology; D005260:Female; D006801:Humans; D019654:Lens Implantation, Intraocular; D008297:Male; D054120:Phakic Intraocular Lenses; D011184:Postoperative Period; D011300:Preoperative Care; D011446:Prospective Studies; D041623:Tomography, Optical Coherence; D055815:Young Adult