Measurement of refractive errors in young myopes using the COAS Shack-Hartmann aberrometer.

Purpose: To evaluate the Complete Ophthalmic Analysis System (COAS; WaveFront Science) for accuracy, repeatability, and instrument myopia when measuring myopic refractive errors.

Methods: We measured the refractive errors of 20 myopic subjects (+0.25 to -10 D sphere; 0 to -1.