a vision testing method and apparatus are disclosed , the method including measuring the modulation to a wavefront of light that is imparted by an intra - ocular lens , determining the wavefront modulation necessary to emulate the optical properties of the iol after it replaces the crystalline lens in a patient &# 39 ; s eye , generating a static or dynamic image viewable by a patient , modulating the wavefront of the image remote from the patient to attain the wavefront that necessary to emulate the optical properties of the iol after it is implanted , and relaying said wavefront to a plane nearby , on , or within the patient &# 39 ; s eye . the apparatus includes devices for measuring the modulation to a wavefront of light that is imparted by an intra - ocular lens , determining the wavefront modulation necessary to emulate the optical properties of the iol after implantation in a patient &# 39 ; s eye , generating a static or dynamic image viewable by a patient , modulating the wavefront of the image remote from the patient to attain the wavefront necessary to emulate the optical properties of the iol after it is implanted , and relaying said wavefront to a plane nearby , on , or within the patient &# 39 ; s eye .