Efficacy and safety of extended depth of focus intraocular lenses in cataract surgery: a systematic review and meta-analysis

Jing Liu, Yi Dong, Yan Wang, Jing Liu, Yi Dong, Yan Wang

Abstract

Background: This study aims to evaluate the efficacy and safety of extended depth of focus (EDOF) intraocular lenes (IOLs) in cataract surgery.

Methods: All comparative clinical trials that involved bilaterally implanting EDOF IOLs in patients with cataract were retrieved from the literature database. We used random effects models to pool weighted mean differences (WMD) and risk ratio (RR) for continuous and dichotomous variables, respectively.

Results: Nine studies with a total of 1336 eyes were identified. The subgroup analysis was conducted according to the type of IOLs used in the control group. Compared with monofocal IOLs, EDOF IOLs produced better uncorrected intermediate visual acuity (WMD: -0.17, 95% CI: - 0.26 to - 0.08, P = 0.0001) and uncorrected near visual acuity (WMD: -0.17, 95% CI: - 0.21 to - 0.12, P < 0.00001). EDOF IOLs resulted in reduced contrast sensitivity, more frequent halos, however, higher spectacle independence (RR: 2.81, 95% CI: 1.06 to 7.46, P = 0.04) than monofocal IOLs. Compared with trifocal IOLs, EDOF IOLs produced worse near visual acuity (MD: 0.10, 95% CI: 0.07 to 0.13, P < 0.0001). EDOF IOLs performed better than trifocal IOls in contrast sensitivity, and there were no significant difference in halos and spectacle independence. Serious postoperative complications were rare, with no adverse events were reported in most studies.

Conclusions: Increasing the risk of contrast reduction and more frequent halos, EDOF IOLs provided better intermediate and near VAs than monofocal IOLs. At the expense of near vision, patients receiving EDOF IOLs have better contrast sensitivity than those receiving trifocal IOLs. Halo incidence and spectacle independence of EDOF IOLs were similar to those of trifocal IOLs.

Keywords: Cataract; Extended depth of focus; Intraocular lens; Meta-analysis; Monofocal; Trifocal; Visual function.

Conflict of interest statement

The authors declare that they have no competing interests.

Figures

Fig. 1
Fig. 1
Flow chart showing the study selection process
Fig. 2
Fig. 2
Forest plot of binocular uncorrected visual acuity. a UDVA. b UIVA. c UNVA
Fig. 3
Fig. 3
Defocus curves. a EDOF and monofocal IOLs. b EDOF and trifocal IOLs
Fig. 4
Fig. 4
Forest plot of spectacle independence. a EDOF and monofocal IOLs. b EDOF and trifocal IOLs
Fig. 5
Fig. 5
Funnel plot for publication bias test

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