Clinical observation of visual performance in patients with bilateral refractive multifocal intraocular lens

Objective To evaluate and compare the visual performance between the patients with the bilateral refractive multifocal and monofocal intraocular lens(10 L).Methods It was a prospective nonrandomized controlled study.Twenty five patients(50 eyes)received phacoemulsification and IOL implantation were divided into two groups,10 patients(20 eyes)in the multifocal group,and 15 patients(30 eyes)in the monofocal group.Three months after surgery,the results of the uncorrected distance and near vision,the best corrected distance and near vision,Chinese reading vision,the contrast sensitivity and stereopsis acuity were measured,the subjective visual performance after surgery was evaluated by the questionnaire.Results The difference of the uncorrected distance,the best corrected distance and near vision between the multifocal and monofocal groups was not statistical significant.The uncorrected near vision and Chinese reading vision were statistically better in the multifocal group than the monofocal group.Photopic contrast sensitivity at high spatial frequency(18 c/d) and mesopic sensitivity with glare at medium frequency(6 c/d) were statistically lower in the multifocal group(P0.05).The spectacle independent rate of multifocal and monofocal group were 90.00% and 26.66% respectively.The mild and moderate glare and halo were existent in both groups.No serious glare and halo phenomenon were reported.Conclusions Compared with the monofocal intraocular lens,the refractive multifocal intraocular lens could provide a satisfactory recovery of vision function and good visual performance except the slight decrease of the contrast sensitivity.