1. The Reliability of Successive Scheimpflug Imaging and Anterior Segment Optical Coherence Tomography Measurements Decreases With Increasing Keratoconus Severity

    The Reliability of Successive Scheimpflug Imaging and Anterior Segment Optical Coherence Tomography Measurements Decreases With Increasing Keratoconus Severity

    Purpose: This study assesses the reliability of successive measurements of tomographic parameters in different keratoconus (KC) stages with 2 different devices. Methods: A total of 125 eyes (13 controls: 24 eyes, and 73 patients with KC: stages 1|2|3|4, n = 24|24|26|27 according to Topographical KC Classification) were repeatedly examined 5 times with the rotating Scheimpflug tomograph (Pentacam HR, Oculus, Wetzlar, Germany) and an anterior segment optical coherence tomograph (Casia 2, Tomey, Nagoya, Japan). Outcome measures included 1) mean anterior (KA) and 2) mean posterior powers (KP), 3) mean anterior (AC) and 4) posterior cylinders (PC ...

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