RESEARCH ARTICLE
Agreement between Clinical History Method, Orbscan IIz, and Pentacam in Estimating Corneal Power after Myopic Excimer Laser Surgery Kaevalin Lekhanont*, Manachai Nonpassopon, Khemruetai Wannarosapark, Varintorn Chuckpaiwong Department of Ophthalmology, Ramathibodi Hospital, Mahidol University, Bangkok, Thailand *
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Abstract OPEN ACCESS Citation: Lekhanont K, Nonpassopon M, Wannarosapark K, Chuckpaiwong V (2015) Agreement between Clinical History Method, Orbscan IIz, and Pentacam in Estimating Corneal Power after Myopic Excimer Laser Surgery. PLoS ONE 10(4): e0123729. doi:10.1371/journal.pone.0123729 Academic Editor: Sanjoy Bhattacharya, Bascom Palmer Eye Institute, University of Miami School of Medicine;, UNITED STATES Received: June 25, 2014 Accepted: March 6, 2015 Published: April 8, 2015 Copyright: © 2015 Lekhanont et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. Data Availability Statement: All relevant data are within the paper.
The purpose of this study was to investigate the agreement between the clinical history method (CHM), Orbscan IIz, and Pentacam in estimating corneal power after myopic excimer laser surgery. Fifty five patients who had myopic LASIK/PRK were recruited into this study. One eye of each patient was randomly selected by a computer-generated process. At 6 months after surgery, postoperative corneal power was calculated from the CHM, Orbscan IIz total optical power at the 3.0 and 4.0 mm zones, and Pentacam equivalent keratometric readings (EKRs) at 3.0, 4.0, and 4.5 mm. Statistical analyses included multilevel models, Pearson’s correlation test, and Bland-Altman plots. The Orbscan IIz 3.0-mm and 4.0 mm total optical power, and Pentacam 3.0-mm, 4.0-mm, and 4.5-mm EKR values had strong linear positive correlations with the CHM values (r = 0.90–0.94, P =
