Phoria cards tests vertical and horizontal muscle balance for both near and far testing distance. 

Referral considerations indicated on cards for imbalance beyond certain prism diopters or balance beyond specified esophoria and exophoria ranges. Phoria Card test measures: 10-1/2" x 8-1/2" (26.7cm x 20.3cm)

Cards have rounded corners
Printed on rigid matte finish vinyl