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E. Pedrotti, M. Passilongo, A. Sbabo, G. Marchini; Comparison of Optical Coherence Tomography and Ultrasound Biomicroscopy for the Valuation of Corneal Recipient Bed‘s Central Thickness and the Total Corneal Central Thickness in Deep Lamellar Keratoplasty . Invest. Ophthalmol. Vis. Sci. 2006;47(13):1346.
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The purpose of this study was to demonstrate the capability of Optical Coherence Tomography to measure the corneal recipient bed‘s central thickness (CRB) and the total corneal central thickness (TCCT) in deep lamellar keratoplasty and compare the results with those of Ultrasound Biomicroscopy (UBM).
The CRB and the TCCT in 23 eyes of 22 subjects were determined with OCT3 (Carl Zeiss Meditec) and UBM System 840 (Carl Zeiss Meditec). Five scans of each eye were obtained with OCT3 and OCT Stratus® program, later the central thicknesses of every scan were measured with Pachicaliber program (OCX Systems). These results were compared with five correspondent UBM measures for each thickness of each eye.
The mean of CRB’s central thickness obtained with UBM was 138.18 ± 18.71 µm, with OCT3 136.54 ± 21.91 µm, the mean of TCCT estimated with UBM was 663.35 ± 70.96 µm and with OCT3 666.87 ± 74.26 µm. The OCT3 measures showed high correlation with UBM using the Pearson correlation method (r=0.963 for the CRB and r=0.977 for the TCCT) and a non statistic significant (P=.233 for the CRB and P=.833 for the TCCT using the Students’ T test).
These results show that OCT, a noninvasive instrument, is an accurate technique to evaluate the corneal recipient bed‘s central thickness and the total corneal central thickness in deep lamellar keratoplasty.
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