Comparison on visual function after implantation of an apodized diffractive aspheric multifocal or monofocal intraocular lens

Purpose:To evaluate visual outcomes after implantation of an aspheric multifocal/ intraocular lens (MIOL)or an aspheric monofocal intraocular lens (IOL).Methods:This was a prospective nonrandomized study.During 3-months of post-operative follow-up,the following outcomes for SN6AD1 MIOL (multifocal group)and SN60WF IOL (monofocal group) were compared:uncorrected (UDVA) and corrected (CDVA) distance visual acuity,uncorrected (UNVA) and distance-corrected (DCNVA) near visual acuity,Chinese character near visual acuity,uncorrected intermediate visual acuity (UIVA) under high (100％ contrast)and low contrast (10％ contrast),UIVA for different IOL powers,and a quality-of-life questionnaire.Results:UNVA,DCNVA,and UIVA under high contrast in the multifocal group were significantly better than those in the monofocal group (P＜0.05).UDVA,CDVA and UIVA under low contrast did not differ between groups at 63 cm and 100cm (P＞0.05).In most cases,Chinese character near visual acuity was significantly better in the multifocal group (P＜0.05).UNVA and UIVA at 63 cm improved over time during 3 months post-operatively.Better UIVA was found in emmetropic and mild myopic eyes as compared to hyperopic ones.The patients in the multifocal group had a higher degree of satisfaction and performed better on near and intermediate tasks,although with greater complaints of visual disturbance.Conclusion:The SN6AD1 MIOL provides significantly better UNVA, DCNVA and UIVA under high contrast conditions,and better Chinese character near visual acuity.Patients receiving the SN6ADI MIOL reported a better quality of vision in spite of more serious visual disturbances.Better UIVA was observed in emmetropic and mildly myopic eyes.(Eye Science 2012;27:5-12)