Multifocal lens with reduced visual impairment

摘要

The method and system provide an ophthalmic device. The ophthalmic device includes an ophthalmic lens (110) having a front surface (112), a rear surface (114), at least one diffractive structure (120), and at least one base curved surface (130). The at least one diffractive structure provides a first spherical aberration for a first focal point corresponding to at least a first focal length. The at least one base curved surface provides a second spherical aberration for at least a second focal point corresponding to at least a second focal length. The first spherical aberration and the second spherical aberration are provided such that the first focus has a first focus spherical aberration and the second focus has a second focus spherical aberration. The first focal spherical aberration is opposite in sign to the second focal spherical aberration.