title: Changes in pupil size and centroid shift in eyes with uncomplicated in-the-bag IOL implantation.
abstract: OBJECTIVE
  To determine changes in entrance pupil size and pupil center shift under low mesopic and photopic conditions of illumination in eyes with in-the-bag intraocular lens (IOL) implantation.
  
  
  METHODS
  Entrance pupil size and pupil center shift were measured under low mesopic (0.06 lux) and photopic (60 lux) conditions of illumination in 55 patients with unilateral pseudophakia (study group) and 55 age- and sex-matched patients with bilateral cataracts (control group) using the NIDEK OPD-Scan. Pseudophakic eyes had an uncomplicated intraoperative and postoperative course and best spectacle-corrected visual acuity of 20/20. Cataractous eyes had no additional ocular or systemic problems affecting the pupil. Both groups were analyzed with respect to pupil size and shift in both conditions of illumination.
  
  
  RESULTS
  Mean patient age was 64.2 +/- 6.8 and 63.6 +/- 4.3 years in the study and control groups, respectively (P = .45). In the study group, differences in pupil size under low mesopic (5.12 +/- 1.02 and 5.13 +/- 0.96 mm for pseudophakic and phakic eyes, respectively) and photopic (3.44 +/- 0.39 and 3.45 +/- 0.39 mm for pseudophakic and phakic eyes, respectively) conditions of illumination were not statistically significant (P = 1.00 and P = .95 for pseudophakic and phakic eyes, respectively). Differences in pupil shift between pseudophakic (0.11 +/- 0.08 mm) and phakic (0.12 +/- 0.10 mm) eyes were not statistically significant (P = .83) in the study group. In the control group, differences in pupil size under low mesopic (P = .59) and photopic conditions of illumination (P = .60) in the right and left eyes as well as pupil shift (P = .71) were not statistically significant.
  
  
  CONCLUSIONS
  Uncomplicated in-the-bag IOL implantation has no influence on pupil size and shift.
authors.affiliation: Gulhane Military Medical Academy and Medical School, Etlik, Ankara, Turkey. gsobaci@gata.edu.tr
authors.forename: Gungor
authors.initials: G
authors.lastname: Sobaci
authors.forename: Uzeyir
authors.initials: U
authors.lastname: Erdem
authors.forename: Yusuf
authors.initials: Y
authors.lastname: Uysal
authors.forename: Orkun
authors.initials: O
authors.lastname: Muftuoglu
mesh_terms: D000368:Aged; D003623:Dark Adaptation; D005260:Female; D006801:Humans; D007498:Iris / Q000033:anatomy & histology*; D007903:Lens Capsule, Crystalline / Q000601:surgery*; D019654:Lens Implantation, Intraocular; D008027:Light; D008297:Male; D008875:Middle Aged; D019591:Pseudophakia / Q000503:physiopathology; D011680:Pupil / Q000502:physiology*