Dr. Richard Chu will help you decide on the type of IOL that will replace your cloudy lens. There are IOLs available to treat nearsightedness (myopia), farsightedness (hyperopia), and astigmatism. IOLs usually provide either near or distance vision: these single focus lenses are called monofocal IOLs. Some advanced IOLs can provide for near, intermediate, and distance vision: these multiple focus lenses are called presbyopia-correcting or technologically advanced IOLs. IOLs that treat astigmatism are called toric IOLs.