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KMID : 0360220140550010059
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Journal of the Korean Ophthalmological Society
2014 Volume.55 No. 1 p.59 ~ p.65
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Utility of the Noncontact Specular Microscopy for Measurements of Central Corneal Thickness
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Yang Young-Seong
Koh Jae-Woong
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Abstract
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Purpose: To evaluate the efficacy of noncontact specular microscopy (NCSM) by comparing the measurement of central corneal thickness (CCT) to the measurement with anterior segment optical coherence tomography (AS-OCT) and ultrasound pachymetry (USP).
Methods: One examiner measured the CCT of 50 eyes of 50 healthy young subjects using NCSM, AS-OCT, and USP. The mean values and correlations were analyzed.
Results: The mean CCT value was 546.92 ± 32.06 μm with NCSM, 535.24 ± 30.54 μm with AS-OCT, and 546.38 ± 30.70 μm with USP. The CCT measurements with NCSM and USP were significantly thicker than with AS-OCT (p < 0.001, p < 0.001, respectively). There were no significant differences between the measurements obtained with NCSM and USP (p = 0.505). The 3 instruments were significantly correlated (r > 0.900 in all groups, p < 0.001 in all groups).
Conclusions: CCT measurements of healthy eyes using NCSM are more correlated with USP than AS-OCT. The CCT measurement using NCSM is a better alternative for USP than AS-OCT.
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KEYWORD
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Anterior segment optical coherence tomography, Central corneal thickness, Noncontact specular microscopy, Ultrasound pachymetry
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