Bifocal and Multifocal Contact Lenses for Presbyopia and Myopia Control
Table 6
Outcomes from clinical trials involving the use of bifocal/dual-focus and multifocal (including peripheral gradient and extended depth of focus) contact lenses for myopia control.
Axial length growth: defined as the % of growth in the test group compared to the control group ; negative value implies a benefit of the treatment. Visual Acuity Rating Scale (100 = 6/6). DISC: defocus incorporated contact lens, concentric refractive; EDoF: extended depth of focus, only Design III is considered–currently manufactured by mark’ennovy; PG: peripheral gradient; DF: bifocal concentric design with large central zone for distance vision; CDMF: center-distance multifocal for presbyopia; CDBF: center-distance bifocal for presbyopia; +SA: soft contact lens with the induction of positive spherical aberration; −SA: soft contact lens with the induction of negative spherical aberration; T: test device: C: control device; ΔT|ΔC: increment in treatment|control groups; HC: high contrast; LC: low contrast N.R: not reported; Accomm.: accommodation; Discont.: discontinuation.