Patent ID: 7114808

Claim:
An apparatus for determining correction for a patient's eye, comprising: a light source; optics directing light from said light source to the patient's eye; at least one test lens disposable into a line of sight defined between the patient's eye and a target, such that the patient perceives the target through the at least one test lens and wherein the at least one test lens corrects for aberrations of the patient's eye so as to provide improved vision to the patient's eye; at least one wavefront measurement device positioned to measure a wavefront of light reflected from the patient's eye, wherein the measured wavefront is indicative of the improved vision of the patient's eye provided by the at least one test lens; and at least one processor configured to calculate a Quality of Vision Factor (QVF) value corresponding to said measured wavefront, said QVF defined as QVF=exp−(Σ n P n Z n 2 ), wherein Z n corresponds to coefficients for Zernike polynomials and P n correspond to psychometric weight factors.