Corneal Thickness in Keratoconus: Comparing Optical, Ultrasound, and Optical Coherence Tomography Pachymetry

Purpose: To compare the central and peripheral pachymetry measurements determined using Orbscan IIz (Bausch & Lomb, Rochester, NY), Visante optical coherence tomography (OCT; Carl Zeiss Meditec, Dublin, CA), and RTVue OCT (Oculus Technologies, Wynwood, WA) with ultrasound pachymetry in eyes with established keratoconus and to evaluate the agreement between them. Design: Evaluation of diagnostic technologies. Participants: One hundred six eyes of 67 consecutive patients with a clinical diagnosis of keratoconus ranging in age from 12 to 40 years. Methods: Central corneal thickness (CCT) was determined by all the 4 techniques. (Read more...)

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