Fig. 1. Optic disc photographs and visual fields of the right eye of a patient with progressive normal-pressure glaucoma. The right optic disc at baseline (A) and 6 years later (B). The visual field of the right eye at baseline (C) and after 6 years of follow-up (D). Multiple measurements of intraocular pressure, including diurnal curve measurements, never revealed pressures greater than 13 mmHg in this eye.