Table 1 Studied Groups Descriptive Statistics (M ± SD)

Age, years

22.3 ± 3.2

52.4 ± 2.2

0.0001

Female: Male

15:15

15:15

–

Mean spherical equivalent of refraction, D

0.2 ± 0.1

0.2 ± 0.2

1.00

Axial length, mm

23.5 ± 0.5

23.5 ± 0.4

1.00

Keratometry, ax 90°, D

43.2 ± 1.3

43.3 ± 1.1

0.61

Keratometry, ax 180°, D

43.0 ± 1.1

43.1 ± 1.1

0.62

Amplitude of accommodation, D

6.93 ± 1.12

1.99 ± 0.89

0.0001

Mean prism equivalent of distance heterophoria, PD

−1.2 ± 0.2

−1.1 ± 0.3

0.88