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: an original image creation step of creating a pair of left and right original images for enabling a patient to perform stereoscopic viewing by utilizing binocular parallax, based on virtual scene data constituted by virtual objects placed in visual field spaces of the left and right eyes; an image creation step of calculating, based on optical data of a right eye eyeglass lens of the pair of left and right eyeglass lenses deigned in accordance with prescription information of the patient, distortion and blur of the right eye eyeglass lens and processing the right eye original image by adding the distortion and blur of the right eye eyeglass lens to the right eye original 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 image by adding the distortion and blur of the left eye eyeglass lens to the left eye original image, so as to create images of left and right visual fields viewed through the pair of left and right eyeglass lenses; and an image display step of stereoscopically displaying the processed images viewed through the pair of left and right eyeglass lenses on a screen, in the image creation step of creating the images of the left and right visual fields viewed through the pair of left and right eyeglass lenses, a value of the blur is calculated by setting a same amount of accommodation to the left and right eyes in regard to all of object points in the visual field spaces.