Clinical Outcomes Of Monofocal Intraocular Lens With Enhanced Intermediate Function Bilateral Implantation With Mini-Monovision Strategy

Monofocal intraocular lens (IOL) with enhanced intermediate function has the disadvantage of low short-range vision compared to multifocal IOL. However, compared to multifocal IOLs, there were no side effects such as glare, halo, and decreased contrast. Therefore, we intend to analyze the results of visual acuity, satisfaction, and dependence on near-field glasses when monofocal IOLs with enhanced intermediate function were inserted through the mini-monovision method.

Tertiary traing hospital, Asan Medical Center

Patients who underwent binocular monofocal IOLs with enhanced intermediate function implantation were analyzed. Through the dominant eye examination before surgery, a distant target (emme) was set for the dominant eye, and -0.75 to-1.25D for the non-dominant eye was set as targets. One month after surgery, patients with a binocular spherical equivalent difference of more than 0.5D were selected as the mini-monovision group, and patients with less than 0.5D as the control group. At one month after surgery, uncorrected distance visual acuity, uncorrected intermediate visual acuity, uncorrected near visual acuity, contrast sensitivity, defocus curve, and satisfaction questionnaire were evaluated between the two groups.

The results of 17 mini-monovision and 24 control groups were analyzed. There was no significant difference between the two groups preoperative age, spherical equivalent values, and axial length. There was no significant difference in binocular uncorrected distance visual acuity. However, there were significant differences in uncorrected intermediate visual acuity (0.09±0.18logMAR, mini-monovision group vs. 0.18±0.12logMAR, control group,p=0.011) and uncorrected near visual acuity (0.18±0.05logMAR, mini-monovision group vs. 0.50±0.21logMAR, control group,p<0.001). Independence on spectacles for near vision was 80% in the mini-monovision group and 28% in the control group (p=0.002), which were highly independent in the mini-monovision group.

Mini-monovision implantation of binocular monofocal IOLs with enhanced intermediate function is a good method that can improve uncorrected near visual acuity without deteriorating uncorrected distance visual acuity or satisfaction.