The Effect of Spectacle-Induced Low Myopia in the Non-Dominant Eye on the Binocular Defocus Curve with a Non-Diffractive Extended Vision Intraocular Lens

Abstract

Purpose: To quantify the changes in the binocular defocus curve associated with the Vivity™ non-diffractive extended vision intraocular lens when the dominant eye was targeted for emmetropia and the non-dominant eye was artificially targeted for slight myopia using spectacles. Patients and Methods: This was a non-interventional research study of the corrected binocular defocus curve associated with binocular emmetropia (Setting A) and with emmetropia in the dominant eye and two different levels of myopia simulated in the non-dominant eye (−0.50 D, Setting B and −1.00 D, Setting C). Subjects were patients implanted with the AcrySof ® IQ Vivity ® intraocular lens in both eyes 3 to 12 months previously. Using the defocus data, the percentage of subjects with a continuous 2.5 D range of vision (distance to 40 cm) was calculated for various levels of minimum visual acuity (VA). Results: Forty subjects were enrolled. The mean spherical equivalent refraction was −0.06 D ± 0.36 D, with 0.37 D ± 0.29 D of refractive cylinder. There was no statistically significant difference in the mean VA at −0.25 D or at −0.50 D vergences between the test Settings, but there was a statistically significant difference at all other vergences. Differences were particularly noticeable at −2.00 D, −2.50 D and −3.00 D, where higher myopia in the nondominant eye yielded better binocular VA. A 2.5 D range of functional vision (20/25) was achieved by 38% of subjects at Setting A, 68% of subjects at Setting B and 85% of subjects at Setting C. At setting C, all but one subject (39/40, 97.5%) had a 2.5 D range of vision with a VA of 20/32 or better. Conclusion: Significant gains in binocular near vision, with only a nominal effect on distance vision, can be achieved with the Vivity IOL by leaving the non-dominant eye of patients with 0.50 D or 1.00 D of myopia.

Clinical Outcomes and Quality of Vision Associated with Bilateral Implantation of a Wavefront Shaping Presbyopia Correcting Intraocular Lens

“…The overall Quality of Vision scores were somewhat higher than expected, though visual disturbances such as glare, halos and starbursts were reported infrequently and were classified as of little or no bother. The frequency, severity and degree of bother related to glare, halos and starbursts reported here are lower than those reported by Bala et al 13 and Arrigo et al 15 for the same lens using the same questionnaire; subjects were evaluated at 3 months postoperative in these two studies. 13 In the current study, hazy vision and blurred vision were reported most often.…”

“…Defocus curve results are reported in a separate publication. 15 Demographic and surgical planning data were obtained from the subjects' clinical records. Surgeries were performed bilaterally on the same day, with one eye targeted for the least-plus sphere from the surgery planning results and the contralateral eye targeted for the least-minus sphere.…”

The Vivity Extended Range of Vision IOL vs the PanOptix Trifocal, ReStor 2.5 Active Focus and ReStor 3.0 Multifocal Lenses: A Comparison of Patient Satisfaction, Visual Disturbances, and Spectacle Independence

“…Some authors have suggested that binocular near vision with the Vivity lens may be improved with a mini-monovision target in the nondominant eye. 16 …”

Profile of a new extended range-of-vision IOL: a laboratory study

“…The presence of the transition elements featured by the DFT015 might explain the significant improvement in the refractive outcomes of the DFT015 compared to the SN60WF, observed by other authors [9][10][11]. Further clinical trials will be necessary to confirm the refractive outcome by real-word experience and to compare this IOL with other PCIOLs.…”

“…In the current study, we have analysed the surface profile of a non-diffractive presbyopia-correcting IOL (DFT015), characterized by the introduction of two surface elements on its optic. Only a few data on DFT015 optical bench and clinical outcomes have been published so far due to its relatively recent introduction into clinical practice [9][10][11][12][13].…”