1. An eyeglasses-wearing simulation method for simulating how an outside is viewed when a pair of left and right eyeglass lenses are placed in front of left and right eyes, the method comprising: creating a pair of left and right original parallax images based on virtual scene data selected by a patient constituted by virtual objects placed in visual field spaces of the left and right eyes, and configured to enable a patient to perform stereoscopic viewing by utilizing binocular parallax; calculating, based on optical data of a right eye eyeglass lens of the pair of left and right eyeglass lenses designed in accordance with prescription information of the patient, distortion and blur of the right eye eyeglass lens and processing the right eye original parallax image by adding the distortion and blur of the right eye eyeglass lens to the right eye original parallax image, and calculating, based on optical data of a left eye eyeglass lens of the pair of left and right eyeglass lenses, distortion and blur of the left eye eyeglass lens and processing the left eye original parallax image by adding the distortion and blur of the left eye eyeglass lens to the left eye original parallax image, so as to create images of left and right visual fields viewed through the pair of left and right eyeglass lenses; and stereoscopically displaying the processed images viewed through the pair of left and right eyeglass lenses on a screen, wherein, a value of the blur is calculated by setting a same amount of accommodation to the left and right eyes in regard to all object points in the visual field spaces.