Korean J Ophthalmol. 2022 Jun 15. doi: 10.3341/kjo.2022.0025. Online ahead of print.
ABSTRACT
PURPOSE: To evaluate the clinical availability of a multifunctional ocular biometric unit, MR-6000 (Tomey Corporation, Nagoya, Japan), for simultaneous keratometry, tonometry, topography, and pachymetry evaluation, and compare anterior segment measurements with five other devices: autokeratometer (KR-1, Topcon, Tokyo, Japan), Scheimpflug camera (Pentacam HR, Oculus, Wetzlar, Germany), swept-source optical coherence tomography (IOLMaster 700, Carl Zeiss, Oberkochen, Germany), Placido disk scanning-slit topography (Orbscan II, Bausch & Lomb, NY, USA), and noncontact tonometry (FT-1000, Tomey Corporation).
METHODS: Thirty patients (30 eyes) who visited our clinic for cataract surgery were examined using MR-6000 and the other devices. The mean keratometry (Km), central corneal thickness (CCT), white-to-white (WTW) distance, and intraocular pressure (IOP) values were compared. Repeated measures analysis of variance, Wilcoxon signed rank test, intraclass correlation coefficient (ICC), and Bland-Altman plot were used to assess the correlation and agreement between devices.
RESULTS: Thirty eyes of thirty patients were evaluated. Statistically significant differences in Km between MR-6000, KR-1, Pentacam HR, and IOLMaster 700 were not observed (p > 0.05). All five devices, including Orbscan II, had almost perfect agreement in measuring keratometry (ICC > 0.80, p < 0.05). CCT measured by MR-6000 was significantly different from that of Pentacam HR and Orbscan II measurements (p < 0.05) but correlated with that of Pentacam HR and Orbscan II measurements (ICC > 0.60, p < 0.05). The WTW distance measured by MR-6000 was not significantly different from that measured by IOLMaster 700 but was different from that measured by Orbscan II. IOP measured by MR-6000 was not correlated with FT-1000.
CONCLUSIONS: Keratometric values obtained through MR-6000 can be used interchangeably with other devices based on good correlation and agreement. However, the CCT, WTW, and IOP values were not interchangeable with a single multifunctional unit for cataract surgery preoperative examination.
PMID:35766048 | DOI:10.3341/kjo.2022.0025
