Is Partial Coherence Interferometry More Accurate than A Scan Ultrasonography in The Estimation of Anterior Chamber Depth?
Journal Title: The Egyptian Journal of Hospital Medicine - Year 2018, Vol 71, Issue 2
Abstract
<strong>Purpose: </strong>To assess the degree of agreement of anterior chamber depth (ACD) measurements by optical device (NIDEK AL-scan biometer) and contact ultrasound A-scan (Mentor<sup> [R]</sup> - Advent<sup> [TM]</sup> A/B system US biometry). <strong>Setting: </strong>Department of Ophthalmology at ALAZHAR University, Cairo, Egypt. <strong>Methods: </strong>This prospective observational cross sectional comparative study of 50 normal healthy eyes were included in this study, ACD estimation was done by 2 methods partial coherence interferometry (PCI), and contact ultrasound A-scan. The measurements were performed by the same observer. The difference in measurements between the two methods was assessed using the t-test. <strong>Results: </strong>The mean ACD (±SD) by the two methods were (2.8 mm) and (3.5 mm), respectively. There was a statistically significant difference between measurements recorded by the 2 methods (P<0.01). <strong>Conclusion</strong>: there was a statistically different between the two methods the PCI values were significantly higher (by 0.7 mm) than the U/S values with no correlation between the two sets of values. So, PCI is more accurate but we still need U/S measurements in some situations (e.g., tear film abnormalities, corneal pathologies).
Authors and Affiliations
Eman Helal
Keywords
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