Placido disk-based topography versus high-resolution rotating Scheimpflug camera for corneal power measurements in keratoconic and post-LASIK eyes: reliability and agreement The intra-examiner and inter-examiner R were lower for all parameters measured using the high-resolution rotating Scheimpflug camera. In the post-LASIK eyes, the intra-examiner and inter-examiner ICC were >0.87 for all parameters. Inter-examiner R values were lower for all parameters measured using the high-resolution rotating Scheimpflug camera.
As compared with measurement by high-resolution Placido disk-based topography, the intra-examiner R of the high-resolution rotating Scheimpflug camera was lower for Kf (0.32 vs 0.88), Ks (0.61 vs 0.88), and Km (0.32 vs 0.84) but higher for Ks-Kf (0.70 vs 0.57). The mean differences between modalities were 6.92 μm between rotating Scheimpflug and ultrasound (P 0.95.
The average measurements of central corneal thickness by rotating Scheimpflug imaging, scanning-slit pachymetry, and ultrasound were 537.15 ± 32.98 μm, 542.06 ± 39.04 μm, and 544.07 ± 34.75 μm, respectively. The results from scanning-slit topography are given with and without correction for "acoustic correction factor" of 0.92. All measurements were performed by a single experienced examiner. Central corneal thickness in 157 healthy eyes of 157 patients without ocular abnormalities other than refractive errors was measured, in a sequential order, once with rotating Scheimpflug camera and scanning-slit topography and 3 times with ultrasound pachymetry as the last part of examination.
Prospective, observational, cross-sectional study. To evaluate and compare central corneal thickness measurements using rotating Scheimpflug camera, scanning-slit topography, and ultrasound pachymetry in virgin, healthy corneas. Sedaghat, Mohammad Reza Daneshvar, Ramin Kargozar, Abbas Derakhshan, Akbar Daraei, Mona Comparison of central corneal thickness measurement using ultrasonic pachymetry, rotating Scheimpflug camera, and scanning-slit topography.
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