Comparison of intraocular lens decentration and tilt measurements using 2 Purkinje meter systems

Maedel, Sophie, Hirnschall, Nino, Bayer, Natascha, Markovic, Sabine, Tabernero, Juan, Artal, Pablo, Schaeffel, Frank and Findl, Oliver (2017) Comparison of intraocular lens decentration and tilt measurements using 2 Purkinje meter systems. Journal of Cataract and Refractive Surgery, 43 (5). pp. 648-655. ISSN 1873-4502

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Purpose: To evaluate the difference in intraocular lens tilt and decentration measurements with 2 Purkinje meters. Setting: Vienna Institute for Research in Ocular Surgery, Hanusch Hospital, Vienna, Austria. Design: Prospective evaluation of diagnostic test. Methods: This single-center study included pseudophakic patients in 2 substudies in which 3 consecutive measurements were performed with 2 Purkinje meters (Spanish and German). In substudy 1, an inexperienced examiner performed all measurements after a short learning period. In substudy 2, all measurements were taken by experienced examiners under direct supervision of the inventors of the devices. Results: Substudy 1 included 53 pseudophakic eyes in which all 53 scans were successful with the Spanish device; however, only 35 measurements (66%) were successful with the German Purkinje meter. The mean tilt measured with the Spanish Purkinje meter was 4.35 degrees ± 2.50 (SD) and 9.20 ± 6.96 degrees with the German Purkinje meter. The mean decentration was 0.44 ± 0.19 mm and 0.74 ± 0.91 mm, (P = .44), respectively. In substudy 2 (29 pseudophakic eyes), the number of successful scans was 29 (100%) and 18 (62%) for the Spanish meter and German Purkinje meter, respectively. The mean horizontal and vertical tilt difference vector between the 2 systems was 4.89 ± 3.24 degrees and 7.57 ± 3.82 degrees, respectively. Conclusions: Concerning clinical feasibility, the Spanish Purkinje meter had a greater percentage of successful scans than the German device. In addition, this device measured significantly higher tilt values than the Spanish Purkinje meter.

Item Type: Journal Article
Keywords: optics, ophthalmology, intra-ocular lenses
Faculty: ARCHIVED Faculty of Medical Science (until September 2018)
Depositing User: Juan Tabernero
Date Deposited: 08 Sep 2017 15:25
Last Modified: 09 Sep 2021 16:12

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