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Demographic data of the subjects.
| Group 1 n = 30 |
Group 2 n = 30 |
Group 3 n = 30 |
|
|---|---|---|---|
| Age (years) | |||
| Mean ± SD | 11 ± 3 | 32 ± 4 | 59 ± 4 |
| Range | 5–17 | 25–39 | 44–77 |
| Sex | |||
| Female | 16 | 14 | 15 |
| Male | 14 | 16 | 15 |
| Refraction (diopter) | +0.25 ± 0.25 | +0.25 ± 0.25 | +0.50 ± 0.25 |
