Aberration analysis and optical design of aspheric spectacle lens

The conditions are discussed under which the spherical aberration, coma and distortion of point-focal, i.e. free of astigmatism, the spectacle lenses can be corrected on the basis of the Seidel aberrations of the optical system consisting of eye and aspheric spectacle lens. It is shown that distortions of point focal aspheric spectacles lens can be lower than spherical ones through optimizing their form factor and that only the lens with deep back-surface could be corrected both astigmatism and distortion at the same time. An approach for designing distortion-corrected point-focal aspheric spectacle lenses free of inflection points along their aspheric surface is presented. As an example, various of aspheric lenses with ± 6.0 m-1 are obtained. The performance comparison indicates that the aberration correction of aspheric spectacle lens agrees with the predictions of its primary aberration theory.