(a) Drawing showing an eye with a multifocal IOL and PVD. The light rays first pass through the cornea and then the IOL. The high density of the PVD causes dispersion of the light rays. (1) The light ray in black represents distance vision. (2) The light ray in red represents near vision. (3) The wavy blue line represents vitreous detachment. (4) The gray arrows show dispersion of the light rays when they pass through the dense vitreous causing halos, floaters, and blurred vision. (b) The drawing shows the light rays reaching the retina without interference from the vitreous detachment after PPV, indicating the potential for good near and distance vision without glasses. The red lines indicate the light rays for near vision.