Blended Vision Achieved by Combining High and Low Addition Power Diffractive Intraocular Lenses with Micromonovision: A Clinical Outcome.

Purpose: To evaluate the clinical outcome of blended vision combined with micromonovision (MMBV) using a +4 diopter (D) addition power (add) diffractive intraocular lens (MIOL) and a +2.75D add MIOL with a myopic target of -0.5 D.

Methods: One hundred twenty eyes of 60 cases were enrolled. The +4 D add MIOLs were placed in the nondominant eye, the +2.75 D add MIOLs were placed in the dominant eye with a myopic target of -0.5 D in 30 cases (the MMBV group), and the +4 D add MIOLs were placed in both eyes in another 30 cases (controls). Postoperative clinical outcomes were compared between the two groups.

Results: Compared with the controls, binocular uncorrected intermediate vision at 70 cm was significantly better in the MMBV group (=0.02). Contrast sensitivity at 12 cycles per degree and the 6% and 12.5% low-contrast visual acuities were also significantly better in the MMBV group compared with the controls ( values = 0.05, 0.05, and 0.04, respectively). Uncorrected and corrected distance and near VA did not differ significantly between the two groups.

Conclusion: MMBV provided a better intermediate VA, contrast sensitivity, and low-contrast VA than bilateral implantation of the +4 D add MIOL, while preserving comparable near and distance vision.