[Debate on the advantages and disadvantages of multifocal and monofocal intraocular lens].

Phacoemulsification and intraocular lens implantation is the most effective treatment of cataract.Traditional intraocular lens were mainly monofocal. Postoperative patients can return to a certain distance vision or near vision, but because of the loss of accommodative power, patients must rely on glasses to complete the work of the different distances, the postoperative life there is still a lot of inconvenience. In recent years, the design of multifocal intraocular lens has been the focus of basic and applied research in cataract, but so far the researchers still could not have agreement with the strengths and weaknesses of the multifocal and monofocal intraocular lens. There are three major controversies: First of all, whether it is worth the expense of contrast sensitivity and increased visual disturbance in return for compensatory adjustment? Second, whether it is possible to really get the full range of vision and to get rid of dependence on glasses to use multifocal intraocular lens? Third, how to grasp the indications of multifocal intraocular lens to play to their strengths.