Table 2.
Comparison of samples between both groups of patients.
| Test | NH-LVD group (N = 33) Average value ± SD |
EXO-MHVD group (N = 33) Average value ± SD |
P-value |
|---|---|---|---|
| AC/A | 2.41/1 ± 1.31 Δ/D | 1.96 ± 0.84 Δ/D | 0.25 |
| AA | 10.97 ± 1.71 D | 11.04 ± 2.03 D | 0.83 |
| MAF | 12.86 ± 3.34 cpm | 7.28 ± 5.29 cpm | <0.001* |
| BAF | 10.82 ± 3.62 cpm | 4.45 ± 4.14 cpm | <0.001* |
| MEM | 0.61 ± 0.23 D | 0.34 ± 0.37 D | 0.002* |
| NRA | 2.30 ± 0.32 D | 2.07 ± 0.43 D | 0.02* |
| PRA | 3.56 ± 1.13 D | 4.23 ±1.54 D | 0.10 |
| PFV blur | 19.68 ± 6.11 Δ | 16.70 ± 6.46 Δ | 0.09 |
| PFV break | 25.64 ± 7.05 Δ | 22.85 ± 8.42 Δ | 0.10 |
| PFV recovery | 13.61 ± 6.35 Δ | 13.73 ± 7.24 Δ | 0.90 |
| NPC break | 2.93 ± 2.02 cm | 7.00 ± 4.13 cm | <0.001* |
| NPC recovery | 7.41 ± 1.19 cm | 11.07 ± 3.05 cm | <0.001* |
| VF | 15.91 ± 2.57 cpm | 10.35 ± 6.16 cpm | <0.001* |
| Stereopsis | 42.73 ± 9.45# | 39.85 ± 9.23# | 0.31 |
NH-LVD: normal heterophoria and low visual discomfort; EXO-MHVD: large exophoria at near and moderate or high visual discomfort; SD: standard deviation, AC/A: ratio AC/A, AA: accommodative amplitude, MAF: monocular accommodative facility, MEM: monocular estimated method, NRA: negative relative accommodation, PRA: positive relative accommodation, BAF: binocular accommodative facility, VF: vergence facility, PFV: positive fusional vergence, NPC: near point of convergence, Δ: prismatic diopter, D: diopter, cpm: cycles per minute, (#): seconds of arch. (*P < 0.05 indicates statistically significant differences between both groups).