We retrospectively studied 42 eyes of 42 patients with glaucoma to determine the pattern of progression of their visual field defects. In 33 eyes (79%) the scotomas became denser. Enlargement occurred in 22 eyes (52%) and 21 eyes (50%) developed new scotomas. Increased density of the scotomas was the only manifestation of change in ten eyes (24%), three eyes (7%) showed enlargement only, and six (14%) showed only new scotomas. Seventeen eyes (57%) with single hemifield involvement maintained a defective single hemifield throughout the follow-up period.