Brock String - Vision Convergence Training - Convergence Insufficiency Tool - Train Vision, Athletic Performance, and More!, White, 6 foot

Product details About this item Care instructions Hand Wash Only See more Convergence training using a Brock String can be useful for convergence insufficiency, as well as strength and athletic performance.

Sports Performance: With a 6-foot long string and 5 tight-fitted beads, this Brock String is great for training the eyes in sport-specific positions – giving you the ultimate athletic edge.

Easy To Use: You can use Brock String right from the comfort of your home with a very short learning curve involved.

High Quality: This Brock String is designed with an extremely high quality, and highly durable string and beads.