Lens design method and resulting aspheric lens

Abstract From the Canadian patent

An aspheric lens for providing improved vision and a method for generating such a lens is described. The lens provides a sharp image focus while minimizing image aberrations. The method utilizes ray tracing techniques in conjunction with Modulation Transfer functions to accurately account for the total corrective lens-eye system. The lens may be in the form of a contact lens an, intraocular lens, a natural lens or a spectacle lens and, is suitable for correcting myopia presbyopia, astigmatism, and other focusing problems. The lens is characterized by a hyperbolic or parabolic surface which functions to reduce spherical aberrations and minimize the retinal image spot size.