title: Reproducibility of standardized retroillumination photography for quantification of posterior capsule opacification.
abstract: OBJECTIVE
  To determine the short-term reproducibility of standardized digital retroillumination images of regeneratory posterior capsule opacification (PCO) using the photographic setup at 1 institution.
  
  
  METHODS
  Department of Ophthalmology, University of Vienna, Vienna, Austria.
  
  
  METHODS
  In this prospective study, 60 retroillumination images of 30 eyes with varying degrees of PCO and different types of intraocular lenses were acquired with a standardized digital coaxial retroillumination system. Two images were taken per eye with a 1-minute interval between images. Ten other eyes were photographed in the same way but with a 5-day interval between the 2 images. All images were evaluated with a fully automated, objective PCO analysis software in which the PCO score was from 0 to 100. The 2 results (A, B) in each eye were compared, and the differences were calculated.
  
  
  RESULTS
  There was a high correlation between the A and B results (r = 0.99). The mean absolute difference was 3.7%. The repeatability coefficient was 8.8%.
  
  
  CONCLUSIONS
  Digital coaxial retroillumination photography provided quick acquisition of regeneratory PCO images. It provided excellent image quality and high reproducibility. The technique forms a good basis for automated quantification of PCO with new software systems.
authors.affiliation: Department of Ophthalmology, University of Vienna, Vienna, Austria.
authors.forename: Wolf
authors.initials: W
authors.lastname: Buehl
authors.forename: Oliver
authors.initials: O
authors.lastname: Findl
authors.forename: Rupert
authors.initials: R
authors.lastname: Menapace
authors.forename: Michael
authors.initials: M
authors.lastname: Georgopoulos
authors.forename: Georg
authors.initials: G
authors.lastname: Rainer
authors.forename: Matthias
authors.initials: M
authors.lastname: Wirtitsch
authors.forename: Hannes
authors.initials: H
authors.lastname: Siegl
authors.forename: Axel
authors.initials: A
authors.lastname: Pinz
mesh_terms: D002386:Cataract / Q000175:diagnosis*; D003941:Diagnostic Techniques, Ophthalmological; D006801:Humans; D007903:Lens Capsule, Crystalline / Q000473:pathology*; D019654:Lens Implantation, Intraocular; D007910:Lenses, Intraocular; D018918:Phacoemulsification; D010781:Photography / Q000379:methods* / Q000592:standards; D011183:Postoperative Complications / Q000175:diagnosis; D011446:Prospective Studies; D015203:Reproducibility of Results