Effect of position of near addition in an asymmetric refractive multifocal IOL on quality of vision

Multifocal intraocular lenses (IOLs) have been used extensively over the past 20 years to enhance near as well as distance vision in the pseudophakic patient. A thorough meta-analysis of numerous studies involving different multifocal IOL technologies in use shows convincing evidence of their ability to restore both near and distance vision. This achievement is not without a small, but significant risk for debilitating visual side effects, such as glare, halo, and reduced contrast sensitivity, that might be severe enough to warrant a technically challenging IOL explantation and exchange.