Fig. 1From: Influence of angle alpha on visual quality after implantation of extended depth of focus intraocular lensesThe measurement of the angle alpha and the intraocular lens (IOL) decentration by iTrace aberrometer analyzer. A The angle alpha was defined as the distance between the center of the visual axis (red cross) and the center of cornea (blue cross). B The IOL decentration was defined as the distance between the center of the visual axis (red cross) and the center of the IOL (yellow cross)Back to article page