Intraocular Lenses Post-Operative Visual Outcomes with a Diffractive Trifocal IOL: A Meta-Analysis of USA and Worldwide Patients Oct 09, 2021 Andrew Maxwell, MD, PhD Related Publications Refractive And Diffractive Principles In Presbyopia-Correcting IOLs — An Optical Lesson Intraocular Lenses Multifocality in IOLs is achieved through refractive or diffractive optical approaches. Learn More ↑