Figure 6.

Baseline visual function of subjects as grouped by respective age categories. Visual function characterized by metrics of peripheral function is shown in (A), function characterized by metrics of isolated central function is shown in (B). A decline in peripheral function is evident from the early ages, whereas a decline in central function becomes apparent only in the later-age categories. Age categories: (1) <15 years of age; (2) 15 to 20 years; (3) 20 to 25 years; (4) 25 to <30 years; (5) ≥30 years.