Table 2.

Comparison of near and far phoria, fusional vergence amplitudes, monocular and binocular accommodative facility (monocular accommodative facility and binocular accommodative facility), and spherical equivalent refraction in cases with and without fusional vergence dysfunction

Index	FVD, mean±SD (range)		P
	Yes	No
Distance phoria (PD)	0.05±0.29 XP (orthophoria-3.00 XP)	0.05±0.37 XP (1.00 EP-3.00 XP)	0.99
Near phoria (PD)	1.82±2.10 XP (2.00 XP-6.00 XP)	1.81±2.17 XP (orthophoria-6.00 XP)	0.96
Distance NFV (break) (PD)	1.76±0.43 (1.00-4.00)	8.17±3.65 (6.00-10.00)	<0.001
Distance PFV (break) (PD)	2.76±1.75 (2.00-8.00)	13.55±6.71 (10.00-22.00)	<0.001
Near NFV (break (PD)	5.06±2.03 (4.00-10.00)	15.91±4.38 (12.00-20.00)	<0.001
Near PFV (break) (PD)	6.53±3.66 (4.00-12.00)	18.34±7.84 (15.00-25.00)	<0.001
MAF (cpm)	10.05±4.80 (8.00-14.00)	10.55±5.20 (8.00-16.00)	0.77
BAF (cpm)	3.18±3.02 (0.00-7.00)	9.22±4.40 (8.00-15.00)	<0.001
AA (D)	7.51±3.75 (3.03-16.67)	11.18±6.53 (1.25-50.00)	<0.001
SE (D)	0.27±1.00 (−3.75-2.00)	0.13±1.14 (−8.5-6.75)	0.35

FVD: Fusional vergence dysfunction, SD: Standard deviation, PD: Prism diopter, NFV: Negative fusional vergence, PFV: Positive fusional vergence, MAF: Monocular accommodative facility, cpm: Cycles per minute, BAF: Binocular accommodative facility, AA: Accommodative amplitude, SE: Spherical equivalent, XP: Exophoria, EP: Esophoria