Functional Classification of a New IOL Into the Category of Partial Depth of Field: Enhanced IOLs According to the ESCRS Criteria.

PURPOSE: To assess whether the Evolux (SIFI) intraocular lens (IOL) can be included in the category of partial-depth of field (DOFi) enhanced IOLs according to the functional classification of the European Society of Cataract and Refractive Surgeons.

METHODS

In this prospective study, a consecutive series of patients implanted with the Evolux in one eye was analyzed and compared to a control group with a monofocal IOL (AcrySof SA60WF; Alcon Laboratories, Inc). Preoperative examinations included optical biometry (IOLMaster 700; Carl Zeiss Meditec AG) and anterior segment imaging (MS-39; CSO). At 2 to 3 months postoperatively, monocular corrected distance visual acuity, distance-corrected intermediate visual acuity (DCIVA), distance-corrected near visual acuity (DCNVA), monocular DOFi in 0.2 logarithm of the minimum angle of resolution (logMAR), and the monocular defocus curve were measured in patients implanted with both IOLs.

RESULTS

The Evolux group included 32 eyes (32 patients) and the monofocal group included 27 eyes (27 patients). The mean DCIVA was, respectively, 0.19 ± 0.11 and 0.30 ± 0.13 logMAR (P = .0009). The mean DCNVA was 0.39 ± 0.12 logMAR in the Evolux group and 0.53 ± 0.18 logMAR in the monofocal group (P = .0007). The mean DOFi in 0.2 logMAR provided by the Evolux was 1.42 ± 0.56 diopters (D); the corresponding value for the monofocal IOL was 1.04 ± 0.54 D (P = .0091). In eyes with the Evolux, the DOFi in 0.2 logMAR DCIVA was negatively correlated with photopic pupil size (r = -0.3748, P = .0346).

CONCLUSIONS

The Evolux offers better visual acuity at an intermediate distance and can be classified as a partial-DOFi enhanced IOL.