In the optimization of the shape of the central zone of the cornea for the three models, the result is a hyperprolate shape (with very negative asphericity values). However, when we analyzed the result of applying the ablation profiles corresponding to each model to determine the general form of the final cornea, the result was a different average asphericity for 6 mm of corneal diameter. Specifically, in the PM, we found a positive average asphericity—that is, the shape of the cornea was flatter in the center and more curved along the periphery. This implies greater power in the periphery than in the center, coinciding with the aim of the PM of creating a zone for near vision on the periphery. Furthermore, we found that the lower the addition, the lower the asphericity was also. As other works have shown previously,29 a positive value of the corneal asphericity involves positive values of the spherical aberration and the opposite, as our results corroborate. In the CM and the AM, we found negative spherical-aberration values, whereas in the PM the spherical aberration was positive. Other studies have reported changes to more negative values of the spherical aberration using an ablation model with the center corrected for near vision.8,9 Although these values are not comparable with ours, Jung et al.,9 for example, found that the coefficient varied from 0.14 μm pre-surgery to 6 months after surgery. Also, Alió et al.8 reported a decrease of spherical-aberration coefficients from 0.41 to 0.36 μm. The fact that the literature does not show positive values for spherical-aberration ablations with the periphery corrected for near vision, as in our PM, is because in most cases analyzed the treatment was made with hypermetropic subjects.12,13 For correcting a hypermetrope, the curvature of the cornea is increased to raise the power both in the central zone (corrected for distance vision) as well as in the peripheral zone (corrected for near vision). As a result, the ablated corneal zone is made more prolate and increases the negative spherical aberration.12 The greater spherical aberration extends the depth of focus, favoring the vision for near and intermediate distances.30,31 It is worth pointing out that one of the limitations of having worked with the Liou-Brennan model is that the initial spherical-aberration values are lower than those of the real eye; nevertheless, this was not relevant to our results, as the aim of this work was to compare the three multifocal models with each other and not to the initial emmetropic model.