The study included 767 eyes of 566 patients. Of the eyes studied, 222 showed rapid progression and 545 eyes showed slow progression. The three factors Dr. Ramanathan and the research team identified as indicators of rapid progression are:
• Worse mean deviation to the visual field
• Age
• Greater vertical cup-to-disc ratio at baseline
The study classified rapid progression to be a rate of 36% in visual change per year.
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