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A. Sbabo, M. Passilongo, E. Pedrotti, G. Marchini; Comparison of Optical Coherence Tomography With Wavelength of 1310 Nm and Ultrasound Biomicroscopy for the Valuation of the Corneal Residual Bed‘s Central Thickness and the Total Corneal Central Thickness in Deep Lamellar Keratoplasty. Invest. Ophthalmol. Vis. Sci. 2007;48(13):3884.
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The purpose of this study was to demonstrate the capability of Optical Coherence Tomography with wavelength of 1310 nm to measure the corneal recipient bed‘s central thickness (CRBT) and the total corneal central thickness (TCCT) in deep lamellar keratoplasty and compare these results with those of Ultrasound Biomicroscopy (UBM).
The CRBT and the TCCT in 24 eyes of 22 subjects were determined with OCT VisanteTM (Carl Zeiss Meditec) and UBM System 840 (Carl Zeiss Meditec). Five scans of each eye were measured with OCT and later these results were compared with five correspondent UBM’s measures for each eye.
The mean of CRBT obtained with UBM was 132.50 + 25.48 µm and with OCT was 130.17 + 35.70 µm. The mean of TCCT estimated with UBM was 649.75 + 73.23 µm and with OCT was 630.08 + 67.72 µm. The OCT’s measures showed high correlation with UBM using the Pearson correlation method (r=0.775 for the CRBT and r=0.944 for the TCCT) and a non statistic significance using the Students’ T test for the CRBT (P=0.940), while resulted statistic significance for TCCT (P<0,001).
These results show that OCT, a noninvasive instrument, is an accurate technique to evaluate the CRBT in comparison with UBM. In respect of TCCT, UBM shows a statistical significance overestimate compared with OCT. Our UBM’s overestimate in pachymetry measurements confirms the findings already present in literature.
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