Abstract
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 (p=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 (p 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.
Highlights
Modern diffractive multifocal intraocular lenses (MIOLs) were first introduced with +4 diopter (D) near addition power, and several studies have demonstrated that MIOLs provide reliable functional outcomes for distance and near vision
A high add power MIOL can achieve excellent near visual acuity (VA) at reading distance, decreased contrast sensitivity is a well-known adverse effect of this type of IOL [1]
We inserted a + 2.75 D add power IOL in the dominant eye targeting −0.5 D myopia so that the near focal point can be shifted to approximately 40 cm while preserving the good contrast of this type of MIOL combined with a + 4 D add power MIOL in the nondominant eye
Summary
Blended Vision Achieved by Combining High and Low Addition Power Diffractive Intraocular Lenses with Micromonovision: A Clinical Outcome. 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 + 2.75 D add MIOL with a myopic target of −0.5 D. Binocular uncorrected intermediate vision at 70 cm was significantly better in the MMBV group (p 0.02). Contrast sensitivity at 12 cycles per degree and the 6% and 12.5% low-contrast visual acuities were significantly better in the MMBV group compared with the controls (p values 0.05, 0.05, and 0.04, respectively). MMBV provided a better intermediate VA, contrast sensitivity, and lowcontrast VA than bilateral implantation of the +4 D add MIOL, while preserving comparable near and distance vision
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