METHODS: Retrospective study. A total of 49 eyes of 28 patients with cataract who underwent phacoemulsification combined with multifocal IOL implantation from March 2018 to February 2019 were collected. There were 30 eyes of 18 patients in the bifocal group, aged 40-85(mean 67.08±10.80)years. The trifocal group consisted of 19 eyes of 10 patients, aged 38-79(mean 62.21±14.50)years. All patients underwent visual quality analysis system(OQAS), defocus curve and other examinations.

RESULTS: The near BCVA of the two focus groups was better than that of the three focus groups, and the medium UCVA and far BCVA of the three focus groups were better than those of the two focus groups(all P<0.05). The trifocal group had better visual acuity at +1.5, -1.0, -1.5, -2, -2.5D and -3.0D defocus than the bifocal group. OQAS visual quality parameters were better in the two-focus group than in the three-focus group in OV 20%, OV 9%, and SR(all P<0.05).

CONCLUSION: Both bifocal and trifocal IOL implantation can achieve good uncorrected and near visual acuity and high visual quality, while trifocal IOL can achieve better intermediate visual acuity.