Sports Eye Sight Train Three Beads Brock String Vision Convergence Insufficiency Training Tool

Specifications: Condition: Type: Brock String Beads material: Plastic Size: Beads diameter: 2cm Rope length: 204cm Brock String - used in fixing convergence insufficiency and sports 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. Package Included: 1 x Cord 3 x Beads

Notes: Other acceories demo in the picture is not included. Due to manual measurement, please allow size differences about 1-5mm. Due to the light and screen setting difference, the item's color may be slightly different.

About shipping
Shipping and Packaging All itwill be double checked and well packed before sending.Itwill be dispatched within 2 business days after buyers pay for the order. It usually takes about 14 to 18 working days for delivering the package to the destination(for e areas,it may take a little longer). 

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