Convergence, Accommodation, Fusion, and Stereopsis: What Keeps the Eyes Aligned in Intermittent Exotropia?

Table 1

Group A: descriptive statistics for patient group and control group (Mann–Whitney U test).

	Patient group				Control group				U test
	Min	Max	Mean	Std. deviation	Min	Max	Mean	Std. deviation	value
Age	3.00	64.00	17.77	16.02	13.00	25.00	19.05	2.72	NE
Angle at far	8.00	55.00	18.16	9.73	NE	NE	NE	NE	NE
Angle at near	8.00	50.00	17.60	10.01	NE	NE	NE	NE	NE
Positive FA at near	8.00	45.00	23.15	9.66	10.00	45.00	24.60	9.94	0.64
Positive FA at far	6.00	45.00	17.05	9.39	10.00	40.00	17.80	6.61	0.18
Positive FA at near recovery	2.00	40.00	17.32	8.65	4.00	40.00	18.60	8.20	0.47
Positive FA at far recovery	2.00	40.00	11.93	8.34	6.00	30.00	13.30	6.52	0.16
Positive reserve at near	−29.00	37.00	5.55	12.33	NE	NE	NE	NE	NE
Negative FA at near	6.00	30.00	15.55	5.11	4.00	18.00	12.00	3.37	0.00
Negative FA at far	4.00	30.00	12.22	6.62	4.00	8.00	6.30	1.63	0.00
Negative FA at near recovery	2.00	25.00	12.56	4.67	2.00	14.00	8.70	3.20	0.00
Negative FA at far recovery	2.00	25.00	9.90	6.14	2.00	6.00	3.80	1.58	0.00
Total negative FA at near	12.00	70.00	30.16	12.81	NE	NE	NE	NE	NE
Total negative FA at far	12.00	75.00	30.38	14.84	NE	NE	NE	NE	NE
NPC	8.00	33.00	16.37	7.68	8.00	23.00	12.65	4.09	0.14

FA = fusional amplitude; NE = not evaluable