Figure.

Model structure and stages of glaucoma progression in patients undergoing glaucoma screening or usual care management. Patients were African American, between the ages of 50 and 59 years, with no history of glaucoma undergoing universal screening or usual care (sporadic screening that results in 50% of patients with glaucoma being undiagnosed). Patients with diagnosed glaucoma were treated and all patients with glaucoma were at risk of developing new or progressively worsening glaucoma-related visual loss. *Confirmatory eye examination identified patients with false-positive frequency-doubling technology results. 1, 2, and 3 are probability nodes; (+) represents replication of branches at node (n), where n=1, 2, or 3.