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S. C. Barbarino, A. J. Kanellopoulos; Comparison of Central Corneal Thickness, Best Anterior and Posterior Cornea Sphere Measurement With Pentacam, Orbscan, and Ultrasound. Invest. Ophthalmol. Vis. Sci. 2007;48(13):3935.
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© ARVO (1962-2015); The Authors (2016-present)
The purpose of this study was to compare central corneal thickness (CCT), best fit anterior and posterior sphere measurements obtained with the Pentacam (Oculus) with scanning slit topography (Orbscan; Bausch & Lomb), and with ultrasound pachymetry (Nidek).
CCT in 50 consecutive healthy, un-operated practice patients (100 eyes) was measured twice with each modality.
The mean CCT values as determined with the different modalities (+/-standard deviation) were: 532+/-29 microm, 555+/-37 microm, 530+/-34 microm, respectively. The differences between modalities (+/-95% limits of agreement) were -2.8+/-21 microm between rotating Scheimpflug and ultrasound, 25+/-31.2 microm between scanning slit and ultrasound, and 23+/-27 microm between scanning slit and rotating Scheimpflug imaging.
In the assessment of normal corneas, the Pentacam measured CCT values closer to ultrasound pachymetry and with less variability compared with Orbscan.
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