Repeatability of central corneal thickness measures by Orbscan pachymetry for right and left eyes

Eye & Contact Lens
Sven Jonuscheit, Michael J Doughty

Abstract

To assess the repeatability of Orbscan measures on right versus left eyes. Three Orbscan measures were taken from the right eye and then the left eye by the same operator on 50 healthy myopic subjects (average right eye = -4.3 DS) aged 19 to 58 years, half of whom were successful long-term soft contact lens (SCL) wearers. The central point thickness measurement was compared for the 3 scans for each eye, the variability calculated based on the coefficient of variation (COV) and also paired comparisons with limits of agreement. No acoustic factor was applied. Single central point thickness values ranged from 0.483 to 0.663 mm, with mean values of 0.579 mm for both eyes, with no statistically significant difference between spectacle wearers and SCL wearers (P>or=0.387). From 3 repeat scans, the net difference was -0.001 mm between third and first scans of right eyes and +0.001 mm for left eyes (P>or=0.5). Overall, the COV was close to 1%, being marginally higher (0.955% and 1.176%) in spectacle wearers than SCL wearers (0.922% and 0.836%; P, NS). However, an overall assessment of the COV data indicates that the values were inversely related to absolute thickness values, being slightly higher for thinner versus thicker corneas (P<o...Continue Reading

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Citations

Nov 23, 2012·Cornea·Juan A Sanchis-GimenoAlejandro Cerviño
Sep 15, 2010·Optometry and Vision Science : Official Publication of the American Academy of Optometry·Adam KeechLyndon Jones
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Jan 15, 2013·Bioelectromagnetics·Andreas Karampatzakis, Theodoros Samaras
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Jun 29, 2010·Clinical & Experimental Optometry : Journal of the Australian Optometrical Association·Nathan EfronCraig A Woods
Mar 3, 2019·International Ophthalmology·Yanjun HuaQinmei Wang
Apr 2, 2021·Journal of Anatomy·Shaun P Collin, H Barry Collin

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