Bifocal and Multifocal Contact Lenses for Presbyopia and Myopia Control

Figure 2

Illustration of the power maps (left), the proportion of the total pupil area covered by the distance and near correction as a function of the pupil diameter (center), and the through-focus Visual Strehl for pupil diameters of 4 mm and 6 mm (right) of different simultaneous image multifocal and bifocal contact lenses: (a) Acuvue Oasys for presbyopia, (b) Dual Focus, (c) PV: Purevision and (d) Airoptix (redrawn from Plainis et al. [37]). Profiles are designed to provide a distance correction power of −3.00 and an addition power of +2.00 diopters resulting in −1.00 of near correction power.

(a)

(b)

(c)

(d)