Paul Lichter, MD, for the Collaborative Initial Glaucoma Treatment Studyreported the results of an analysis of variables reflecting iOP controlassociated with visual field loss over 5 years. Four hundred twenty-sevenpatients who were followed for more than 6 years were analyzed. They hadbeen randomly assigned to medical therapy or a filtering procedure. Dr.Lichter reported that visual field loss was significantly associated witha larger maximum IOP, increased IOP variation, and a higher mean IOP. Dr.Lichter suggested that ophthalmologists focus on keep patient IOPs under18 mm Hg for as long as possible and avoid wide swings in IOP.