What is a Brock String?

A brock string is a common vision therapy tool. It consists of a white flexible cord or string, approximately 10 - 15 feet in length, with colored wooden beads that can be moved to various positions along the length of the string. The Brock offers instant feedback to the participant if their eyes are working together to focus on an object at various distances. The Brock string is often used in vision therapy for patients with vergence disorders such as Convergence Insufficiency, patients with Amblyopia (also called Lazy Eye), and for patients with Strabismus.

 

Why is the Brock String important in vision therapy?

The Brock string is a great detection tool to help identify if you may have problems with convergence (such as Convergence Insufficiency or Convergence Excess) or suppression. The Brock string is also used therapeutically in vision therapy to help patients develop skills of convergence as well as to disrupt suppression. Also, the activity can be altered to make it easier or more difficult by bringing the beads closer/further to the nose and/or by employing lenses and prisms.

Although this procedure is usually associated with binocular vision and anti-suppression therapy, it can also be a valuable procedure for developing accurate fixation skills under binocular conditions.

 

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What is a Brock String? (seevividly.com)