title: Changes in Anterior Chamber Depth after Phacoemulsification in Pseudoexfoliative Eyes and their Effect on Accuracy of Intraocular Lens Power Calculation.
abstract: OBJECTIVE
  To compare anterior chamber depth (ACD) changes after phacoemulsification surgery in patients with pseudoexfoliation syndrome (PEX) and normal patients using an anterior segment imaging method. Another aim of this study was to evaluate the effect of these changes on the accuracy of intraocular lens (IOL) power calculation and postoperative refraction.
  
  
  METHODS
  Twenty-two eyes of 22 patients with PEX and 30 eyes of 30 normal patients who underwent uneventful phacoemulsification surgery and IOL implantation were included in the study. The ACD of all patients was evaluated preoperatively and at 3 months postoperatively with the ALLEGRO Oculyzer (WaveLight® Oculyzer™ II, Alcon, Novartis)-Scheimpflug imaging system.
  
  
  RESULTS
  The postoperative mean ACD values were significantly larger than the preoperative ACD values in both groups (p<0.001 for both groups). The pre- to postoperative change in ACD was 0.46±0.3 mm in the PEX group, which was a larger change than seen in the normal patients (0.12±0.1 mm) (p=0.04). The mean absolute errors (MAE) calculated with different IOL formulas (SRK/T, Haigis, Hoffer and Holladay 1 formulas) were comparable and no statistically significant difference was observed between the two groups (p=0.21).
  
  
  CONCLUSIONS
  Phacoemulsification induces more significant ACD changes in patients with PEX compared to normal patients. However, the MAE did not differ significantly between the groups.
authors.affiliation: Başkent University Faculty of Medicine, Department of Ophthalmology, Ankara, Turkey.
authors.forename: Sirel
authors.initials: S
authors.lastname: Gür Güngör
authors.affiliation: Başkent University Faculty of Medicine, Department of Ophthalmology, Ankara, Turkey.
authors.forename: Ahmet
authors.initials: A
authors.lastname: Akman
authors.affiliation: Başkent University Faculty of Medicine, Department of Ophthalmology, Ankara, Turkey.
authors.forename: Leyla
authors.initials: L
authors.lastname: Asena
authors.affiliation: Başkent University Faculty of Medicine, Department of Ophthalmology, Ankara, Turkey.
authors.forename: Mustafa
authors.initials: M
authors.lastname: Aksoy
authors.affiliation: Başkent University Faculty of Medicine, Department of Ophthalmology, Ankara, Turkey.
authors.forename: Almila
authors.initials: A
authors.lastname: Sarıgül Sezenöz
keywords: anterior chamber depth; mean absolute error; phacoemulsification surgery; pseudoexfoliation syndrome