Axial displacement of intraocular lens in the postoperative period in hyperopia

This article analyzes two clinical cases of axial displacement of an intraocular lens (IOL) in the postoperative period in hyperopic patients following cataract surgery with implantation of a monoblock hydrophobic acrylic IOL with S-shaped haptics. In both cases, cataract phacoemulsification was performed using the standard phaco chop technique, with intracapsular IOL implantation targeting emmetropia. It was determined that the refractive shift towards myopia with underlying baseline hyperopia in these cases was not due to errors in calculating the IOL optical power. The cause of ineffective IOL positioning and myopization was the formation of blocks: in the first case — a vitreo-pseudophakic block due to anterior displacement of the pseudophakic diaphragm, and in the second case — a capsular block. It was concluded that when a myopic shift is detected in the postoperative period in patients with cataract surgery targeting emmetropic refraction, it is necessary to thoroughly analyze the obtained results, identify the precise causes of refractive failures, and provide appropriate pathogenetically oriented treatment to achieve the initially planned outcomes.