COMPARISON BETWEEN ULTRASOUND PACHYMETRY AND GDS ANALYSER IN MEASURING CORNEAL THICKNIESS

Objective: Research was aimed at the determination of the of association between mean central corneal thickness observed with the help of Applanation Ultrasound Pachymetry and Galilei dual Scheimpflug Analyzer. Study Design: Descriptive cross-sectional study. Place and Duration of Study: Research was completed from July, 2016 to January, 2017 in Services Hospital, Lahore. Material and Methods: Fifty patients were treated with the measurement of their hundred eyes for the central corneal thickness. Initial three measurements were completed through Galilei dual Scheimpflug analyzer, at the time interval of one minute. Another three measurements were taken from USG pachymetry with the application of the proparacaine (Alcain) 0.5%. Analysis was made on the mean value of the three readings. Results: To measure the mean central corneal thickness of right eye we used Ultrasound pachymetry and Galilei dual Scheimpflug analyzer and observed respectively (546.88 μm ± 27.71) and (544.06 μm ± 27.36) and measurement for left eye (546.52 μm ± 26.15) and (544.72 μm ± 25.47). Both the instruments presented a very positive and strong association (r = 0.969, p-value = 0.000 for right eye & r = 0.956, p-value = 0.000 for left eye). Conclusions: GSA pachymetry readings reflected positive and strong association with ultrasound pachymetry. We can take GSA as an alternative of the ultrasound Pachymetry, for the avoidance of the errors dependent of the operator, related disadvantages and patient discomfort. Keywords: Applanation ultrasound pachymetry, Galilei dual scheimpflug analyzer and Central corneal thickness.