بررسی پایایی و تکرار پذیری دستگاه Spectral domain optical coherence tomography در اندازه گیری ضخامت ماکولا در چشمهای طبیعی قبل و بعد از گشاد کردن مردمک

Background: optical coherence tomography is one of the most valuable imaging techniques in the evaluation of macula. Objective: to investigate the repeatability and reproducibility of OCT  in measuring the macular thickness in normal eyes before and after pupil dilation. Methods: A total of 44 eyes were enrolled. All subjects underwent macular thickness measurement using the Cirrus SD-OCT machine. Results: The mean macular thickness before and after pupil dilation was statistically significant in the nasal quadrant of the outer 6 mm ring (N2) and the inferior quadrant of the outer 6 mm ring (I2) (p=0.001). Conclusion: Since the absolute value of the mean difference between the three measurements in N2 and I2 regions was statistically significant, using a single method (i.e., applying the eye drop or not) is preferable for follow-ups in cases that the measurements are needed within 3 to 6 mm in center of the macula.