Table 2.
Comparison of accommodation and binocular vison parameters among three groups.
| Parameters | Isometropia | Low anisometropia | High anisometropia | F/H | P |
|---|---|---|---|---|---|
| Distance heterophoria (∆) | −1.00 (−2.25, 0.50) | −1.50 (−3.50, −0.50) | −3.00 (−6.00, −1.00)# | 13.722 | 0.001 |
| Near heterophoria (∆) | −2.79 ± 5.88 | −3.87 ± 5.88 | −6.76 ± 7.17#∗ | 3.683 | 0.028 |
| NRA (D) | 2.5 (2.25, 2.75) | 2.5 (2.0, 2.75) | 2.75 (2.5, 2.75) | 3.197 | 0.202 |
| PRA (D) | −3 (−3.75, −2.50) | −2.875 (−4.25, −1.75) | −2.25 (−3, −1.75)# | 6.636 | 0.036 |
| AR (D) | 0 (0, 0.25) | 0 (0, 0.25) | 0.25 (0, 0.5)#∗ | 10.45 | 0.005 |
| AMP (D) | 16 (13.5, 16.5) | 13.75 (11.1, 16)# | 13.5 (12.5, 14.6)# | 14.246 | 0.001 |
| Average age-expected AMP (D) | 15.2 (15.2, 15.8) | 15.05 (14.6, 15.5) | 14.9 (14, 15.5) | 5.11 | 0.078 |
| Differences (D) | 0.2 (−2, 1.15) | −1.15 (−4.1, 0.7)# | −1.5 (−2.3, −0.8)# | 11.811 | 0.003 |
| AC/A ratio (∆/D) | 4 (3, 5) | 4 (3, 5) | 3 (2, 4)#∗ | 9.717 | 0.008 |
| Near stereopsis (log) | 1.51 (1.30, 1.65) | 1.70 (1.40, 2.00)# | 1.80 (1.80, 2.20)#∗ | 30.661 | <0.001 |
NRA: negative relative accommodation; PRA: positive relative accommodation; AR: accommodative response; AMP: amplitude of accommodation; the average age-related AMP: 18.5 − 0.3 ∗ age; Differences: AMP measured value minus average; AC/A: accommodative convergence over accommodation; univariate ANOVA was used for near heterophoria, and the Kruskal–Wallis H was for other values; compared with the control group, #P < 0.05; compared with the low anisometropia group, ∗P < 0.05.