Late postoperative opacification of a new type hydrophilic acrylic intraocular lens

Background:To report the clinical consequences and laboratory characteristics of late postoperative opacification of a hydrophilic acrylic intraocular lens(US-860UV IOL)as well as the prognosis of IOL replacement.Methods:Forty medical records(42 eyes)of patients with US-860UV IOL opacification reporting decreased or lost vision who underwent IOL explantation between 2017 and 2019 were reviewed.Explanted IOLs were analyzed by slit-lamp examination,confocal microscopy,scanning electron microscopy(SEM)and energy-dispersive X-ray spectroscopy(EDS)at the Shandong Key Laboratory of Ophthalmology,Shandong Eye Institute,Shandong First Medical University,and Qingdao University of Science and Technology,Qingdao,China.Results:The mean age of the 40 patients was 74.837.57(63–92)years.The mean interval between cataract surgery and diagnosis of opacification was 32.388.76(17–48)months.Systemic diseases were found without statistical correlations,the most frequent being arterial hypertension,coronary heart disease,and diabetes mellitus.Visual acuity improved from 1.42±1.03 to 0.31±0.16(logMAR)after IOL replacement.SEM,EDS and alizarin red staining showed uniformly distributed,diffuse,milk-white opacification,with calcium and phosphorus deposits on the optic and haptic surfaces that could be dissolved in 1%HCl.Conclusions:Calcium and phosphorus deposition was the main cause of hydrophilic acrylic US-860UV IOL opacification.IOL replacement can safely and effectively improve the visual acuity of patients.