gou 18mm Diameter Brock String Vision Convergence Insufficiency Training Tool
Description: Brock String-used in fixing convergence insufficiency and training. The basic purpose of the Brock String is to develop good binocular functions, in other words to get both eyes working together well. This activity teaches convergence-the ability to point both eyes more accurately at a target. Size: beads diameter: 1.8cm(0.7. Rope length: 260cm(102. Package includes: a cord, three beads, and one case. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is-1-3cm. Description: Brock String-used in fixing convergence insufficiency and training. The basic purpose of the Brock String is to develop good binocular functions, in other words to get both eyes working together well. This activity teaches convergence-the ability to point both eyes more accurately at a target. Size: beads diameter: 1.8cm(0.7. Rope length: 260cm(102. Package includes: a cord, three beads, and one
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