Physiological-Diplopia Cord™ (Brock String)
Item #: BC109+
(Similar to Brock String)
Inexpensive home use instrument for near training as well as to extend phy-dip training from near into distance. Utilizes physical diplopia for training suppression, binocularity and spatial localization. Heavy cord with colored beads. Sold by the dozen in 10' or 20' lengths.