Is Partial Coherence Interferometry More Accurate than A Scan Ultrasonography in The Estimation of Anterior Chamber Depth? | ||
| The Egyptian Journal of Hospital Medicine | ||
| Article 19, Volume 71, Issue 2, April 2018, Pages 2553-2555 PDF (184.14 K) | ||
| Document Type: Original Article | ||
| Author | ||
| Doaa A Mahmoud | ||
| Department of Ophthalmology, Faculty of Medicine for Girls, Al-Azhar University, Cairo, EGYPT. | ||
| Abstract | ||
| Purpose: 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 [R] - Advent [TM] A/B system US biometry). Setting: Department of Ophthalmology at ALAZHAR University, Cairo, Egypt. Methods: 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. Results: 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). Conclusion: 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). | ||
| Keywords | ||
| AC depth; Ultrasound; partial coherence interferometry; phakic IOL | ||
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