An ophthalmic lens for providing a plurality of foci has an optic
comprising an anterior surface, a posterior surface, and an optical axis.
The optic has a first region and a second region. The first region has a
refractive optical power and comprises a multifocal phase plate for
forming a first focus and a second focus. The second region has a
refractive optical power and comprises a monofocal phase plate for
forming a third focus. The multifocal phase plate and the monofocal phase
plate may be disposed on first and second base curvatures, respectively,
that may have different radii of curvature. The ophthalmic lens may also
have an intermediate phase plate located between the multifocal phase
plate and the monofocal phase plate, the intermediate phase plate
comprising a third plurality of echelettes disposed on a third base
curvature having a third radius of curvature.