1. A method for simulating an ocular optical system comprising simulating objects as seen by an observer through spectacle lenses placed in front of right and left eyes, the method comprising the steps of: creating a binocular foveal image with respect to a plurality of object points in a visual field by computer simulation, wherein the binocular foveal image is an image produced by uniting images projected on each fovea of the right and left retinas of the right and left eyes when each of the right and left eyes is rotated in a manner such that an object point in the visual field is caught at the fovea of each of the right and left retinas; and simulating the perception of object points in the visual field as actually seen by an observer through spectacle lenses placed in front of each of the right and left eyes using the binocular foveal image.