The Effect Of Pupil Dilation On Biometric Parameters Of The Aladdin Optical Biometry

Abstract

Purpose: To evaluate the effect of pupil dilation on biometric parameters of the Aladdin optical biometry and compare the accuracy IOL power calculation according to pupil dilation and difference in anterior chamber depth. Methods: This prospective cross-sectional study included 51 eyes of 42 patients who underwent uneventful phacoemulsification with IOL implantation. Preoperative IOL power calculations were performed using Aladdin optical biometer. Postoperative actual refractive errors and errors predicted by the SRK/T formula in eyes with non-dilated and dilated pupils were analyzed. The mean estimation error (EE), mean absolute estimation error (AEE) and the percentage of eyes within ±0.50 and ±1.00 D of target refraction for each of two groups were calculated and compared. (Group 1: eyes with nondilated pupil, Group 2: eyes with dilated pupil). Results: Smaller mean AEE and EE was provided in non-dilated group, however there was no statistically significant difference between two groups (p=0.12 and p=….. respectively). In non-dilated group, higher percentage of eyes within ±0.50 and ±1.00 D of target refraction was also found (62% and 98%), when compared with dilated group (54% and 94%). Conclusions: Based on the Aladdin biometric data used in our study, although better results was obtained when biometric measurements had been done in eyes with non-dilated pupil, there was no statistically significant difference.