Table 5.
Pre- and post-BV parameters in the control and intervention group.
| Parameter | Non-intervention group (n = 22) |
Intervention group (n = 24) |
||||
|---|---|---|---|---|---|---|
| Pre-VT Median (IQR) |
Post-VT Median (IQR) |
*p-Value | Pre-VT Median (IQR) |
Post-VT Median (IQR) |
p-Value Wilcoxon signed rank test |
|
| NPC break (cm) | 9.50 (7–12) | 10 (5–12) | >0.05 | 8 (7–9) | 7 (6–8) | 0.008 |
| NPC recovery (cm) | 10.50 (8.00–12.50) | 11 (6–14) | 9 (8–11) | 8 (7–9) | 0.002 | |
| Distance NFV break (in PD) | 8 (6–10) | 8 (6–10) | 8 (6–12) | 8 (6–12) | >0.05 | |
| Distance NFV recovery (in PD) | 6 (4–8) | 6 (4–6) | 6 (4–10) | 6 (4–10) | ||
| Near NFV break (in PD) | 14 (12–18) | 16 (12–18) | 18 (16–20) | 20 (14–25) | ||
| Near NFV recovery (in PD) | 12 (10–14) | 12 (8–14) | 14 (12–18) | 16 (10–20) | ||
| Distance PFV break (in PD) | 14 (10–20) | 18 (12–20) | 14 (10–18) | 30 (25–30) | <0.0001 | |
| Distance PFV recovery (in PD) | 10 (8–16) | 12 (8–16) | 10 (8–14) | 20 (14–20) | 0.001 | |
| Distance NFV break (in PD) | 25 (14–30) | 20 (12–40) | 25 (14–30) | 40 (30–45) | <0.0001 | |
| Distance NFV recovery (in PD) | 18 (12–25) | 16 (10–25) | 20 (10–20) | 30 (20–45) | <0.0001 | |
| AF OD (cpm) | 4 (2–5) | 2.50 (1–5) | 2 (2–4) | 12 (11–15) | <0.0001 | |
| AF OS (cpm) | 3.50 (1–5) | 4 (1.50–5.00) | 2.50 (1–4) | 12.5 (11.50–15.00) | <0.0001 | |
| AF OU (cpm) | 4 (2–5) | 4 (2–5) | 3.50 (1–5) | 11.50 (10–14) | <0.0001 | |
| NPA OD (D) | 14.3 (11.10–15.40) | 12.50 (10.00–14.30) | 0.018 | 11.8 (11.10–14.30) | 14.3 (11.10–16.70) | 0.008 |
| NPA OS (D) | 14.3 (11.80–15.40) | 11.1 (10.00–16.70) | 0.009 | 12.5 (11.10–14.30) | 14.3 (11.10–16.70) | 0.014 |
Unit: cm, centimetre; PD, prism dioptre; D, dioptre; cpm, cycle per minute.
NPC, near point of convergence; NFV, negative fusional vergence; PFV, positive fusional vergence; NPA, near point of accommodation; AF, accommodative facility; IQR, inter quartile range.