Adjustable intraocular lens power technology

摘要

Despite the many advances in cataract surgery, incorrect intraocular lens (IOL) power remains one of the most frequent causes of IOL exchange. For example, Brandser et al.1 report that only 45% of 298 emme-tropic patients having phacoemulsification or extra-capsular cataract surgery emerged from surgery with a refraction within 0.5 diopter (D) of the intended target. In a larger study performed by Murphy et al.,2 only 72.3% of 1676 eyes having cataract extraction were within 1.0 D and 6.4% were beyond 2.0 D of the planned refraction. Perhaps more compelling are the multiple foldable IOL studies reported by Mamaiis et al.3"7 in which incorrect IOL power was among the highest overall indications (approximately 20% to 40% depending on the year) for explanting 1-piece and 3-piece IOLs. Although the incidence of incorrect IOL power has been decreasing recently, incorrect IOL power remains a significant problem and the issue of persistent refractive error following otherwise successful cataract surgery must be addressed.