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KMID : 0360220120530101412
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Journal of the Korean Ophthalmological Society
2012 Volume.53 No. 10 p.1412 ~ p.1418
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Corneal Thickness Measured by Dual Scheimpflug, Anterior Segment Optical Coherence Tomography, and Ultrasound Pachymetry
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Kim Dong-Wook
Yi Ka-Young
Choi Dong-Gyu
Shin Young-Joo
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Abstract
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Purpose: To compare central corneal thickness (CCT) as measured by dual rotating Scheimpflug camera (Galilei), anterior segment optical coherence tomography (AS-OCT), and ultrasound pachymetry (USP).
Methods: The measurements of CCT using a dual rotating Scheimpflug camera, AS-OCT, and USP in 40 eyes of 20 healthy subjects were compared.
Results: The average measurements of CCT by dual rotating Scheimpflug camera, AS-OCT, and USP were 538.10 ± 31.36 μm, 536.20 ± 31.21 μm, and 541.93 ± 34.93 μm, respectively. The CCT measurement by USP was statistically significantly thicker than by the dual rotating Scheimpflug camera and AS-OCT (p = 0.017, p = 0.001, respectively). There was no significant difference between the dual rotating Scheimpflug camera and AS-OCT (p = 0.054). A significant linear correlation was observed between the dual rotating Scheimpflug camera, the AS-OCT, and the USP (r > 0.900, p < 0.001).
Conclusions: The results of the 3 methods have significant correlation with each other, but the measurement by USP was significantly thicker than the dual rotating Scheimpflug camera and AS-OCT. Therefore, CCT should be interpreted in the context of the instrument used.
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KEYWORD
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Anterior segment optical coherence tomography, Central corneal thickness, Dual rotating scheimpflug camera, Galilei, Ultrasound pachymetry
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