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

Maedel, Sophie and Hirnschall, Nino and Bayer, Natascha and Markovic, Sabine and Tabernero, Juan and Artal, Pablo and 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 0886-3350

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Official URL: https://doi.org/10.1016/j.jcrs.2017.01.022

Abstract

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: Faculty of Medical Science
Depositing User: Juan Tabernero
Date Deposited: 08 Sep 2017 15:25
Last Modified: 08 Sep 2017 15:26
URI: http://arro.anglia.ac.uk/id/eprint/701879

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