Rate of visual field loss and long-term visual outcome in primary open-angle glaucoma.
Kwon Y H, Kim C S, Zimmerman M B, Alward W L, Hayreh S S
This study found primary open-angle glaucoma causes slow visual field loss (-1.5%/year) with standard therapy. Lower IOP and more medications correlate with slower decline, but 19% risk legal blindness over 22 years.