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Total surface area measurements for visual field maps. (A) Total surface area for each map for individual young (blue), healthy aging (red), and mild Alzheimer's disease (green) subjects. (B) Total surface area for each map averaged from ~0.5 to 10° across youthful subjects (blue bars) and normal aging subjects (red bars). Error bars indicate s.e.m. “*” marks statistically significant differences (p < 0.05) between youthful and healthy aging subjects in hV4.
