Records from the United States Air Force glaucoma screening and management program for flying personnel were surveyed to obtain long-term followup information and age-specific prevalences for this population. Untreated ocular hypertensives with tensions of 22-29 with no visual field loss were labeled preglaucoma ocular hypertensives without field loss and treated with epinephrine for tensions above 29 or for other reasons were labeled glaucoma. Those requiring other drugs and those with field loss were disqualified from flying. Questionnaires to ophthalmologists caring for retired men indicated that 1 of the 39 preglaucomas followed 8 years and 2 of the 27 glaucomas followed 7 years had lost visual field. Among ocular hypertensives screened from 15,804 men, ages 40-54, in 1970, only 5 had visual field loss presumed glaucomatous.