BIFOCAL MULTIORDER DIFFRACTIVE LENSES FOR VISION CORRECTION

摘要

A bifocal multiorder diffractive lens (10) is provided having a lens body (11) with one or more first regions (14) having a first multiorder diffractive structure providing near vision correction, and one or more second regions (16) having a second multiorder diffractive structure providing distance vision correction, in which the lens (10) defines an aperture divided between the first and second regions (14, 16). FIGURE 1A