Clinical Results At 1 Month With The Zoe® Intraocular Monofocal Plus Implant

Postoperative evaluation of the refractive results of the ZOE® (OphtalmoPro, Saint-Ingbert, Germany) monofocal plus implant with negative spherical aberration induction.

This retrospective single-centre study includes patients who underwent cataract surgery between January 2023 and July 2024 who were implanted with a ZOE® implant and who underwent a postoperative check-up at 1 month. 

70 eyes of 36 patients were selected for this study.Any ocular pathology that could limit visual resultswas excluded. After one month, acuity without correction and with correction for distance were recorded for distance vision (3.5 m), intermediate vision (70 cm) and near vision (33 cm), in addition to the creation of a defocus curve with correction for distance in scotopic conditions (range from +2D to -2D in 0.5D steps). The acuity was recorded in tenths for distance vision, and with a Parinaud scale for intermediate and near vision, then converted to logMAR for analytical purposes. Finally, patients were asked to fill in a subjective evaluation questionnaire on visual symptoms (modified PRVSQ questionnaire)

 The mean defocus curve falls below the functional threshold of 0.2 logMAR for a defocus value of -1.20±0.41 D, with a total functional vision range of 2.33±0.69 D. For the 34 eyes operated on with a view to emmetropia, the uncorrected acuity for distance, intermediate and near vision were 0.10±0.11, 0.26±0.16 and 0.65±0.23 logMAR respectively. Among the 34 patients who underwent bilateral surgery, anisometropia of less than 0.5 D was targeted for 16 of them (Group A), and between 0.5 and 1 D for the other 18 patients (Group B). Uncorrected acuity for intermediate and near vision was 0.18±0.19 and 0.51±0.22 logMAR for Group A, and 0.10±0.22 and 0.44±0.21 logMAR for Group B, respectively.

The ZOE® implant is an intraocular device that provides good distance refractive results, with added value in intermediate vision with non-existent or negligible photic effects for the vast majority of patients. The extension of defocus can also be used as a binocular strategy by inducing a slight anisometropia, which substantially improves intermediate vision results without impacting binocular distance vision.