J Korean Ophthalmol Soc.  2014 Jan;55(1):59-65.

Utility of the Noncontact Specular Microscopy for Measurements of Central Corneal Thickness

Affiliations
  • 1Department of Ophthalmology, Chosun University College of Medicine, Gwangju, Korea. ophkoh@hanmail.net

Abstract

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 microm with NCSM, 535.24 +/- 30.54 microm with AS-OCT, and 546.38 +/- 30.70 microm 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.

Keyword

Anterior segment optical coherence tomography; Central corneal thickness; Noncontact specular microscopy; Ultrasound pachymetry

MeSH Terms

Microscopy*
Tomography, Optical Coherence
Ultrasonography
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