Developed By:
Grazyna M. Tondel, MD, MS, PhD

Consist of 6 pairs of colorful arrows. The arrow point from each pair touch each other along the middle, vertical line of the card. The card folds along this line and is shaped into a wedge. When used like a Brock String, the card enables training both smooth and jump vergence movements. Cards come pre-cut to easily fold into shape.

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