gms | German Medical Science

Diffractive Multifocal IOLs based on the Huygens-Fresnel principle that the concentric rings on the IOL optic surface diffract light into 2 foci, one for distance vision and another one for near vision. Despite light energy loss at higher orders of diffraction, studies showed that bifocal IOLs provide good visual results at both distance and near. However, the intermediate vision of these “bifocal” diffractive multifocal IOLs is not as strong because light energy mostly diverted towards that 2 foci for usable distance and near vision. PhysIOL Finevision is a Trifocal IOL, which also bases on diffractive principle and consists of 2 diffractive patterns (1.75 diopter & 3.50 diopter) producing foci for distance, intermediate and near vision. Combination of the 2 diffractive patterns reduced the light energy loss by making use of higher order diffraction light energy for near vision, while conserving light energy for the intermediate focus. In this presentation, we are going to discuss the concept & design of this new Trifocal IOL and early post-operative visual outcomes at different distances and patient satisfaction.