Clinical Outcomes Of An Enhanced Monofocal Intraocular Lens

This study aims to evaluate the clinical outcomes of a new enchanced monofocal intraocular lens (IOL) with controlled positive spherical aberration, RayOne EMV (Rayner, UK).

Department of Ophthalmology, Tan Tock Seng Hospital, Singapore.

This was a prospective study where 30 eyes of 15 patients were implanted with the RayOne EMV IOL during cataract surgery. All eyes were targeted for emmetropia. At 1-month post surgery, all patients underwent tests including unilateral and binocular LogMAR uncorrected distance visual acuity (UCDVA) at 4m, uncorrected intermediate visual acuity (UCIVA) at 60cm and uncorrected near visual acuity (UCNVA) at 40cm, corrected distance visual acuity (CDVA), distance-corrected intermediate visual acuity (DCIVA) and distance-corrected near visual acuity (DCNVA), mainifest refraction, pupil size and defocus measurements under photopic and mesopic conditions.

Mean UCDVA, UCIVA and UCNVA were 0.13, 0.21 and 0.27 respectively. Mean CDVA, DCIVA and DCNVA were -0.07, 0.37 and 0.41 respectively. Photopic defocus measurements showed a defocus range of 1.5D from +0.5D (LogMAR 0.05) to -1D (LogMAR 0.20). Similarly, mesopic defocus measurements showed a defocus range of 1.5D from +0.5D (LogMAR 0.01) to -1D (LogMAR 0.19). There was no difference in defocus range between photopic and mesopic conditions.

The RayOne EMV IOL exhibits good distance and intermediate unaided visual acuity independent of photopic or mesopic conditions.