Ocular Effects of Gravity Inversion

To the Editor.— Friberg and Weinreb 1 recently reported the occurrence of increased intraocular pressure with the head-down position, and suggested that patients with certain conditions, including glaucoma, should refrain from inversion altogether. Report of a Case.— We recently saw a 68-year-old athletic physician in excellent health who was first examined in January 1975, for an increase in his cup-disc ratio of 0.6 on the right and 0.7 on the left. Pressures at that time were 18 in both eyes on six separate occasions, and tonography revealed a C value of 0.24 on the right and 0.13 on the left. Visual fields were normal. From 1975 through 1980, applanation pressures taken at different times during the day were always below 21 mm Hg. At the time of reevaluation in February 1981, a small arcuate scotoma was identified in the left eye and early posterior subcapsular cataracts were identified in both