title: Clinical comparison of the zone of clear single binocular vision with the zone of zero-associated phoria.
abstract: Normative data comparing the zone of zero-associated phoria (ZZAP) with the zone of clear single binocular vision (ZCSBV) are presented based on a clinical study of 156 asymptomatic patients. No statistically significant relations were found between zone difference and patient age, sex, and amount of near lens addition in the case of presbyopes.
mesh_terms: D000065:Accommodation, Ocular; D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D005133:Eye Movements; D005260:Female; D005403:Fixation, Ocular; D006801:Humans; D007909:Lenses; D008297:Male; D008875:Middle Aged; D014785:Vision, Ocular