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Tarek A. Shazly, Ernesto D. Golez, Mark A. Latina; Low-Coherence Reflectometry (OLCR) Versus Ultrasonic Techniques Of Pachymetry In Glaucomatous And Non-Glaucomatous Eyes. Invest. Ophthalmol. Vis. Sci. 2012;53(14):100.
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To assess the agreement of the optical low-coherence reflectometry (OLCR) pachymetry with ultrasound pachymetry in glaucomatous and non-glaucomatous eyes.
Central Corneal Thickness (CCT) was assessed using OLCR device LENSTAR LS900 and ultrasound pachymetry (DGH Pachette 3). The agreement between mean CCT measurements obtained from these 2 devices was assessed using a two-sample t-test. Agreement between the two devices was assessed with Bland-Altman plots and 95% limits of agreement.
One hundred ten eyes of 85 subjects were enrolled (64 with glaucoma and 46 normal eyes). Mean optical CCT measurements were 556+/-34 microns in the glaucoma group versus 560+/-33 microns with ultrasound pachymetry (p< 0.001). In the normal group, optical CCT was 560 +/- 37 microns compared to 570+/-37 microns (p< 0.001). For the two methods, the proportion of differences was found to be 100% within 40 microns of difference.
In normal and glaucomatous eyes, noncontact CCT measurements obtained from LENSTAR were statistically lower than those obtained from contact ultrasound pachymetry.
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