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Population Characteristics by Race
| Black | White | Total | |
|---|---|---|---|
| Subjects (n) | 201 | 558 | 759 |
| Sibships (n) | 68 | 206 | 274 |
| Mean age, y (SD) | 71.8 (7.41) | 74.0 (5.92) | 73.4 (6.41) |
| Females (%) | 129 (64.2) | 317 (56.8) | 446 (58.8) |
| Myopia ≤ −1.00 D (%) | 26 (13.3) | 77 (14.6) | 103 (14.2) |
| Mean refractive error (SD) | 0.25 (2.20) | 0.80 (2.01) | 0.65 (2.00) |
