3 Beads Brock String Vision Therapy Sight Focusing Vision Convergence Training Tools for Kids Myopic Strabismus Correction

Features:  Helps improve convergence insufficiency, as well as strength sight focusing. Effectively  promote convergence to corrects nearsightedness and strabismus. Can be used at home, very easy to operate. Can be  used  for convergence insufficiency training,  sports vision training and front sight focusing training. Made of quality beads and line, durable and convenient to use. Specification:  Condition: 100% Brand New  Item Type: Vision Convergence Training Tool Color: As Pictures Show  Material: Plastic  Bead Quantity: 3pcs Line Length: Approx. 223cm / 7.3ft Package List:  1 * Vision Convergence Training Tool