Sometimes when you prescribe an individual over forty years of age glasses for distance and they don't want a bifocal, there can be discomfort. I had a patient who was in her fifties whom we prescribed distance glasses for ( she normally takes her glasses off for reading). She stated the distance was great but she got dizzy looking at her dashboard while driving as well as looking at the ground. I had to weaken the prescription slightly so she could view up close more easily while not disturbing the distance vision significantly. the outcome was good.