Ideal for testing or training in true space at the office or home.  Eliminates suppression while developing fusion and stereopsis.  Non-variable prismatic Red/Green slides build fusional convergence and divergence.  2PD increments from 0 to 30PD BI or BO.  10"x5.5" Red/Green targets on frosted vinyl.  
 
Kit Includes:  Set of 6 slides, One Red/Green Plastic Glasses, One Horizontal Interference Card, Hand held Slide Holder, and One Guide Stick.