Abstract
Purpose
To evaluate the efficacy, safety, and satisfaction of patients who underwent the aspheric micro-monovision protocol for the correction of myopia with presbyopia.
Methods
A retrospective, noncomparative study included 40 eyes of 20 consecutive patients with myopia and presbyopia who were treated with LASIK-induced micro-monovision. Monocular and binocular visual outcomes of uncorrected and best-corrected distance, intermediate, and near visual acuity were measured. Depth of focus, spherical aberration, stereopsis and satisfaction were evaluated before surgery and 3 months after surgery.
Results
Mean patient age was 48.7 years. Monocular uncorrected distance visual acuity was 0.8 in 94% of dominant eyes, and monocular uncorrected near visual acuity was J3 in 94% in non-dominant eyes. Binocular uncorrected near visual acuity was J2 in 94% and J5 in 100% of dominant and non-dominant patient eyes, respectively. Binocular uncorrected distance visual acuity was 1.0 in 100% of patients, and binocular uncorrected near visual acuity was J2 in 94% of patients. Our results showed a significant improvement in depth of focus and a positive shift in spherical aberration in dominant eyes; however, there were no significant changes in the non-dominant eyes. There was no change in stereopsis or contrast sensitivity at any of the tested spatial frequencies. Satisfactory scores were achieved in all eyes.
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![]() | Figure 1.Histogram showing the accuracy to the intended spherical equivalent refraction 3 months after treatment. |
![]() | Figure 2.Cumulative histogram for the distribution of the de-focus equivalent 3 months after treatment. |
![]() | Figure 3.Changes of binocular and monocular uncorrected distant visual acuity 3 months after treatment. (A) Uncorrected distant visual acuity, (B) Uncorrected near visual acuity, (C) Uncorrected intermediate visual acuity. D = dominant eye; ND = non-dominant eye; B = binocular. |
![]() | Figure 4.Combined distance and near binocular uncorrected distance visual acuity 3 months after treatments. Near vision is displayed on the x axis, distance vision is displayed on the y axis, and the percentage of patients with each combination of distance and near vision is plotted. |
Table 1.
Mean apherical equivalent refraction of distance and near eyes before and after the treatment
Table 2.
Comparison of postoperative binocular and monocular uncorrected near visual acuity