Stereopsis Butterfly with LEA SYMBOLS® by Barrier Free Access (HK) Limited Price US$294 Supplier/s Barrier Free Access (HK) Limited Supplier Code 101055 (IAPB) Country of Origin USA Request a quote Product Description Stereopsis Butterfly with LEA SYMBOLS® (VA1010) Product Features Includes booklets, answer key and polarized viewers Stereopsis test combining both butterfly and LEA SYMBOLS® designed to rapidly test for amblyopia & strabismus using gross thru fine stereopsis (2500 to 20 sec of arc). Share: