Economy Brock String with 5 beads603766
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These Economy Brock Strings with 5 beads are used during the treatment of convergence insufficiency and other binocular vision anomalies. They are also used to develop skills of convergence as well as to disrupt suppression of one of the eyes.
These Economy Brock Strings come in various lengths and do not come with handles.
Click here for the Brock String Guide.