Effect On Stereoscopic Vision After Mini-Monovision Approach With Non-Diffractive Rayone Emv Intraocular Lens (Iol)

RayOne EMV is a new enhanced monofocal intraocular lens (IOL) with extended depth of focus and a non-diffractive design. The goal of this study was to assess the effect of mini-monovision on stereoscopic vision of patients who were bilaterally implanted with Rayner RayOne EMV IOL after cataract surgery.

Ophthalmology department, Hopital de la Citadelle, Liège, Belgique

This retrospective study was conducted in Citadelle Hospital (Liège, Belgium). Subjects were bilaterally implanted with Rayner RayOne EMV IOLs using a mini-monovision approach. Target refraction in the non-dominant eye was -0.5 D and emmetropia in the dominant eye. At 3 months following IOL implantation, binocular and monocular, uncorrected, and best- or distance-corrected visual acuities (VAs) were measured at far (6 m), intermediate (66 cm) and near (40 cm) distances. Moreover, stereoscopic vision was measured with and without optical correction using Distance Randot^® test at far, and Titmus and TNO tests at near distance, respectively. 

In total, 10 patients (7 women and 3 men) met the inclusion criteria and were included in this study. Patients age ranged from 63 to 84 years with an average of 74.4 years. Mean refractive difference between dominant and non-dominant eye was 0.44 D. Binocular uncorrected and corrected VAs at all distances were found significantly improved compared with monocular VAs (p<0.05). Moreover, distance stereoscopy was found similar with or without correction. Finally, no correlation was found between the monovision range and the stereoscopic performance.

These results suggest that a 0.44 D amplitude mini-monovision obtained with binocular implantation of Rayner RayOne EMW IOLs can provide a very good binocular vision to the patients from far to intermediate distances. In addition, a useful near visual acuity can be achieved. Moreover, mini-monovision did not seem to disturb stereoscopic vision.