Fig. 5.

Effects of childhood visual experience, light perception level, and Braille reading. For display purposes only, each subject's average threshold was age adjusted (at 0.014 mm/year) to 45 years old, and thresholds of men were gender adjusted (by subtracting 0.018 mm) to equivalent female values. A, Adjusted average thresholds of sighted (left; dashed line) and different subgroups of blind subjects. B, Adjusted average thresholds of blind nonreaders (left; dashed line) and different subgroups of Braille readers. Histogram bars indicate group means, error bars indicate SEs, and numbers indicate group sizes.