gms | German Medical Science

29. Kongress der Deutschsprachigen Gesellschaft für Intraokularlinsen-Implantation, Interventionelle und Refraktive Chirurgie (DGII)

Gesellschaft für Intraokularlinsen-Implantation, Interventionelle und Refraktive Chirurgie (DGII)

26. - 28.02.2015, Karlsruhe

Article

Send article

Comparison of placido-dual rotating Scheimpflug, swept source optical coherence tomography, and placido-slit scanning systems

Meeting Abstract

Search Medline for

  • Chul Young Choi - Seoul, Republik of Korea; Heidelberg

Deutschsprachige Gesellschaft für Intraokularlinsen-Implantation, Interventionelle und Refraktive Chirurgie. 29. Kongress der Deutschsprachigen Gesellschaft für Intraokularlinsen-Implantation, Interventionelle und Refraktive Chirurgie (DGII). Karsruhe, 26.-28.02.2015. Düsseldorf: German Medical Science GMS Publishing House; 2015. Doc15dgii092

doi: 10.3205/15dgii092, urn:nbn:de:0183-15dgii0927

Published: February 25, 2015

© 2015 Choi.
This is an Open Access article distributed under the terms of the Creative Commons Attribution 4.0 License. See license information at http://creativecommons.org/licenses/by/4.0/.

Outline

Text

Purpose: To compare measurements of corneal indices using Placido-dual rotating Scheimpflug (PDRS), swept-source optical coherence tomography (SS-OCT), and Placido-slit scanning (PSS) systems.

Methods: Fifty normal eyes (normal group) and 50 post-refractive surgery eyes (refractive group) were included. Corneal topography measurements were performed using PDRS (Galilei G2, Zeimer),SS-OCT (Casia SS-1000, Tomey), and PSS (OrbscanIIz, Bausch&Lomb). The intraclass correlationcoefficients (ICC) and Bland-Altman plots were used to evaluate the agreement.

Results: The agreement among the three devices in terms of anterior keratometry, best-fit sphereradius and pachymetry was high (ICC>0.9) in both group. Posterior keratometry and eccentricity inboth group had high ICC values between PDRS and SS-OCT (>0.9), but not PSS when compared with theother two devices. PSS exhibited much steeper values for posterior keratometry (P<0.05) in bothgroup. The ICC values for posterior corneal elevation were lower than 0.9 among all three devices, PDRS and PSS showed relatively higher ICC than with the PSS in both group. Maximum posteriorelevation were highest for PSS (38.96±9.53 μmnormal group, 44.98±11.36 μmrefractive group), followed by SS-OCT (10.60±3.30 μmnormal, 10.94±4.03 μmrefractive group), and PDRS (8.84±3.92 μmnormal group, 9.38±3.50 μmrefractive group).

Conclusions: The anterior keratometry and pachymetry obtained using three different devices showedhigh degrees of agreement. Posterior keratometry and eccentricity showed greater agreement between PDRS and SS-OCT than with the PSS system. PDRS and SS-OCT were equivalent in detecting the shape of the cornea and could be considered interchangeable.