Agreement between clinical history method, Orbscan IIz, and Pentacam in estimating corneal power after myopic excimer laser surgery

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 ran...

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Bibliographic Details
Published in:PloS one 2015-04, Vol.10 (4), p.e0123729-e0123729
Main Authors: Lekhanont, Kaevalin, Nonpassopon, Manachai, Wannarosapark, Khemruetai, Chuckpaiwong, Varintorn
Format: Article
Language:English
Subjects:
Adolescent
Adult
Cornea
Correlation
Equivalence
Estimation
Female
Humans
Keratomileusis, Laser In Situ
Laser in situ keratomileusis
Laser surgery
Lasers
Male
Mathematical models
Methods
Middle Aged
Multilevel
Myopia - surgery
Photorefractive Keratectomy
Prospective Studies
Statistical analysis
Surgery
Treatment Outcome
Vision Tests
Visual Acuity
Young Adult
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Summary: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 =
ISSN:1932-6203
1932-6203
DOI:10.1371/journal.pone.0123729