Functional assessment of a new extended depth-of-focus intraocular lens

Eye (Lond). 2019 Mar;33(3):404-410. doi: 10.1038/s41433-018-0221-1. Epub 2018 Sep 28.


Background/objective: This study aimed to investigate the visual performance of a new extended depth-of-focus intraocular lens (EDOF-IOL).

Subjects/methods: In this multicenter, prospective, observational study, we enrolled 97 patients who underwent cataract surgery or refractive lens exchange with implantation of the Mini Well EDOF-IOL (SIFI, Italy). Patients underwent postoperatively the following examinations between 4 and 8 weeks after surgery: corrected distance visual acuity (CDVA), reading speed with Radner's chart, distance-corrected near visual acuity (DCNVA), defocus curve, contrast sensitivity, and haloes quantitative assessment.

Results: In the whole sample, the mean monocular CDVA and DCNVA were, respectively, 0.02 ± 0.07 logMAR and 0.38 ± 0.15 logRAD (logarithm of the reading acuity determination). In the 67 bilaterally implanted patients, binocular CDVA and DCNVA were better (0.00 ± 0.05 logMAR and 0.26 ± 0.13 logRAD) than the corresponding monocular values (p = 0.02 and p = 0.0002, respectively). Ninety-two percent of patients bilaterally implanted reached a binocular reading speed >80 words per minute at a 0.5 logRAD print size (corresponding to the common book print size). The defocus curves showed that the EDOF-IOL provided increased depth of focus through 2.0 D of defocus, with the best performance at 1.0 and 1.5 D. Contrast sensitivity was within normal limits at all spatial frequencies. The mean visual disturbance index was 0.08 ± 0.12, suggesting low night visual disturbances.

Conclusions: The new EDOF-IOL provided good visual acuity for distance, intermediate, and near vision, with no loss of contrast sensitivity and low risk of night visual disturbances.

Publication types

  • Multicenter Study
  • Observational Study

MeSH terms

  • Aged
  • Aged, 80 and over
  • Depth Perception / physiology*
  • Follow-Up Studies
  • Humans
  • Lens Implantation, Intraocular / methods*
  • Male
  • Middle Aged
  • Multifocal Intraocular Lenses*
  • Phacoemulsification / methods*
  • Prospective Studies
  • Pseudophakia / physiopathology*
  • Pseudophakia / surgery
  • Treatment Outcome
  • Visual Acuity / physiology*