Multizone LASIK with peripheral near zone for correction of presbyopia
Purpose: To investigate the refractive outcomes of multifocal LASIK to create a center far, peripheral near zone in presbyopia. Methods: The trial included 42 eyes of 21 hyperopes and 34 eyes 17 myopes. Mean patients age was 47±5.4 years for hyperopes and 45±3.7 years for myopes. Mean refraction spherical equivalent was +1.74±0.94 D in hyperopes and -3.08±1.7D in myopes. The mean baseline addition was +1.89±0.4 D in hyperopes and +1.67±0.44 D in myopes. One-year postoperative outcomes are reported. Results: The mean postoperative spherical equivalent refraction was 0.10±0.56 D in hyperopes and - 0.49±0.51 D in myopes. Three percent of eyes in each group lost two lines of best spectacle-corrected visual acuity. 20/40 or better near uncorrected visual acuity was achieved in 33% of hyperopes and 36% of myopes. Fifty-three percent of hyperopes and 48% of myopes were satisfied or very satisfied with their postoperative near uncorrected visual acuity. Conclusions: Multifocal LASIK to create a center far and peripheral near zone is safe and allows half of the patients to achieve spectacle independence.