Refractive and Visual Results after Implantation of the AcrySof ReSTOR IOL in High and Low Hyperopic Eyes

Abstract

To assess the differences in refractive and visual results obtained in eyes with high and low hyperopia after implantation of a multifocal intraocular lens (IOL). A prospective study was performed on 172 hyperopic eyes implanted with the AcrySof Re-STOR Natural (SN60D3) IOL. Two groups were created, high and low hyperopes (86 eyes in both cases). We analyzed monocular visual acuity for distance and near, with and without distance correction. Photopic and mesopic contrast sensitivity (CS) were also assessed. All measurements were performed at 6 months after surgery. Monocular best distance-corrected visual acuity was 0.01+/-0.03 logMAR for low hyperopes and 0.04+/-0.10 logMAR for high hyperopes. Monocular best distance-corrected near visual acuity was 0.02+/-0.04 and 0.05+/-0.06 logMAR for low and high hyperopes, respectively. CS for high hyperopic eyes under photopic conditions was lower, primarily at high spatial frequencies, in relation to low hyperopic eyes. Differences between both groups were statistically significant for all spatial frequencies (p<0.004). At the mesopic level, high hyperopic eyes showed lower values compared to low hyperopic eyes for all spatial frequencies. However, these differences were only statistically significant for 1.5, 12, and 18 cpd (p<0.002). The visual acuity and CS for both distance and near, with and without distance correction, were statistically better in eyes with low hyperopia compared to those obtained in eyes with high levels of hyperopia.