Visual Outcomes Following Bilateral Implantation Of A Monofocal Intraocular Lens Designed For Enhanced Monovision

To evaluate the visual outcomes following implantation of the Rayone EMV, a non-diffractive Enhanced Monofocal Intraocular Lens (IOL) which utilises controlled positive spherical aberration over the central optical zone to extend the range of vision. It is hypothesised that this unique optic design can provide excellent Monovision outcomes when bilaterally implanted.

Private ophthalmic surgical centre in Ipoh, Malaysia

Prospective interventional case series of patients with bilateral significant cataracts undergoing phacoemulsification cataract surgery and implantation of the Rayone EMV IOL. Dominant eyes were targeted at emmetropia and non-dominant eyes at -1D. Primary endpoints were binocular uncorrected distance (UDVA), intermediate (UIVA at 66cm) and near (UNVA at 40cm) acuities at 1 month. Secondary outcomes were best corrected distance (BDVA), distance corrected intermediate (DCIVA) and distance corrected near (DCNVA) acuities as well as refractive predictability and stability, binocular defocus curve, contrast sensitivity and VF-14 questionnaire scores at 1 month.

:  Sample size of 50 eyes (25 patients) has been targeted and the initial results of the first 10 eyes are reported in this abstract and the results of the total cohort will be reported at the ESCRS meeting should this abstract be accepted for presentation.

All visual acuities were converted to logarithm of minimum angle of resolution (logMAR) for analysis. The mean UDVA, UIVA and UNVA at 1 month were logMAR 0.05, 0.10 and 0.35 respectively. The mean BDVA, DCIVA and DCNVA were logMAR 0.05, 0.25 and 0.55 respectively. The mean refractive spherical equivalent (MRSE) was -0.24 + 0.37 and mean absolute error (MAE) was 0.34 + 0.27 with all eyes within 0.5D of target. The mean VF-14 scores was 90.74 + 8.81.

The initial outcomes from the first 10 eyes (5 patients) implanted with the Rayone EMV IOL are promising as there is excellent refractive predictability and good binocular unaided visual acuities at all distances with good functional vision as evidenced by the high VF-14 scores.