Different laser manufacturers have developed their own algorithms to create this multifocal profile, and accordingly different trade names have been assigned depending on the manufacturer: Supracor (Technolas Perfect Vision GmbH), Presbyond (Carl Zeiss Meditec GmbH), PresbyMax (SCHWIND eye-tech-solutions GmbH), or Custom Q (Alcon Laboratories Inc.) (Fig. 1 ) [ 3 ]. Some of these algorithms are programmed based on the target near addition or planned according to the subject's age, but the effective change on refraction comes from the controlled change in the corneal asphericity from the center to the periphery, depending not only on the magnitude of near addition but also on the distance vision ablation profile (if myopic or hyperopic). Additionally, two more variants have to be considered since presbyLASIK can be central when the near vision profile is applied in the central cornea, or peripheral, when it is applied peripherally [ 4 ].