The pseudoaccommodative cornea multifocal ablation with a center-distance pattern: a review.

PURPOSE To describe an excimer laser ablation architecture called the pseudoaccommodative cornea (PAC) that uses ocular aberrometry and aspheric ablation profiles to create a multifocal cornea. METHODS A descriptive article outlining the theory of the PAC algorithm. RESULTS The topographic changes induced by PAC produce corneal multifocality. CONCLUSIONS PAC-treated eyes have progressive concentric rings of center-distance and midperipheral-near power that enable functional vision at near, intermediate, and distance.