Table 2.

Association between refractive error, heterophoria, and stereoacuity

	Normal Stereoacuity	Subnormal Stereoacuity	P value of Chi-Square Test
No Refractive Error	1704	72
Refractive Error	511	89	<0.00001
Unilateral Refractive Error	119	27	<0.00001
Bilateral Refractive Error	392	62	<0.00001
Ametropia	213	29	<0.00001
Anisometropia	298	60	<0.00001
Orthophoria	2126	148	P=0.014
Heterophoria	89	13
Myopia	379	57	<0.05
Hyperopia	132	32