Brock String: Deluxe Cordlock 10ft/3m in Length with 5 Beads

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Brock String Deluxe Cordlock: Professional Vision Therapy Tool for Convergence Training. Spring-loaded beads stay perfectly in place—no slipping, no adjustments needed. This 10ft/3 m Brock String eliminates the frustration of traditional models where beads migrate during therapy, especially on angled setups or extended sessions. Perfect for treating convergence insufficiency, binocular vision anomalies, and suppression disruption. Position the blue stick end near the nose and anchor the loop end to any fixed point. The ergonomic handle keeps users focused on the exercise, not on managing the string. Trusted by vision therapists and eye care professionals for consistent, reliable results. Durable spring-loaded construction withstands repeated clinical and home therapy applications. Ideal for optometry offices, vision therapy clinics, schools, and personal vision training programs. Instructions are not included and should be obtained from your eye care provider. Ideal for clinical settings, vision therapy offices, and home-based vision training programs. Single unit. Show more