Comparison between Pentacam HR and Orbscan II after Hyperopic Photorefractive Keratectomy

Journal of Ophthalmic & Vision Research
Mahmoud JabbarvandForoozan Narooie-Noori

Abstract

The aim of this study was to determine the agreement between Pentacam HR (Scheimpflug imaging, Oculus) and Orbscan II (scanning slit topography, Bausch and Lomb) in measuring corneal parameters after photorefractive keratectomy (PRK) for hyperopia. In this prospective cross-sectional study, 38 hyperopic eyes undergoing PRK were examined before refractive surgery and 8 to 10 months postoperatively using Pentacam HR and Orbscan II. Ultrasound (US) pachymetry was also used to measure central corneal thickness (CCT). The radius of anterior (A-) and posterior (P-) best-fit sphere size (BFS), central elevation (CE), and anterior maximum tangential power in 3 mm (TG3) and 3-5 mm (TG5) zones, anterior chamber depth (ACD), and central corneal thickness (CCT) were collected and used in the analyses. To study the agreement between the measurements made by the two devices, the method described by Bland and Altman was used and the 95% limits of agreement were calculated. The 95% limits of agreement show reasonable agreement between the measurements by Pentacam HR and Orbscan II for A-BFS, P-BFS, A-TG3, and CCT, but not for A-CE, P-CE, A-TG5, or ACD. CCT values obtained by both Pentacam HR and Orbscan II correlated well with the values deter...Continue Reading

References

Sep 29, 2005·Optometry and Vision Science : Official Publication of the American Academy of Optometry·Birgit LacknerChristian Skorpik
Nov 9, 2005·Optometry and Vision Science : Official Publication of the American Academy of Optometry·Birgit LacknerChristian Skorpik
Jan 3, 2006·American Journal of Ophthalmology·Wolf BuehlOliver Findl
Jul 16, 2010·Cornea·Hamid Reza Jahadi HosseiniMohammad Bagher Abtahi
Aug 20, 2010·Clinical & Experimental Optometry : Journal of the Australian Optometrical Association·Cristina M OliveiraSandra Franco
Nov 9, 2010·Journal of Refractive Surgery·Renato Ambrósio, Michael W Belin

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Citations

Aug 26, 2020·Photodiagnosis and Photodynamic Therapy·Maddalena De BernardoNicola Rosa

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Software Mentioned

Statistical Package for Social Sciences ( SPSS )
MedCalc
Orbscan

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