Fig. 50. The monofocal IOL has its peak performance with 0 D in the phoropter. The ReSTOR™ IOL has two performance peaks, one with 0 D and the other with −3 D dialed into the phoropter because the ReSTOR™ lens possesses a plano correction and a +3.00 correction. A range of pseudoaccommodation can be defined as the range of defocus in diopters through which a person can see 20/40 or better. For the ReSTOR™ lens this pseudoaccommodation range is 6 D, whereas for the monofocal IOL it is 3.5 D. (Courtesy of Alcon Laboratories, Fort Worth, TX.)