Step:

1.Look at the red ball closest to the eye until you see the phenomenon as shown.

2.Look at the yellow ball in the middle of the eye until you see the phenomenon as shown.

3.Look at the green ball farthest from the eye until you see the phenomenon as shown.

Description:

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.

Size:Beads diameter:1.8cm(0.7'')

Rope length:260cm(102'')

Note:

1.Please allow 1-3mm error due to manual measurement.

2.The color may be different with the true item due to the screen display, pls understand.

✨TAKE A LOOK!:1Set Children Training Diameter String Vision Convergence Insufficiency Tool Eye Care Tools New

PRODUCT PROPERTY:✨ 1: The DIY supplies is electrical.Our product is made in CN(origin).The certification is CE.

REASONS TO BUY:✨ String vision convergence: the s-xl lens of the insufficiency tool is designed to help you build a sense of vision and provide you with visual clarity.

✨ Eye care tools: the eye care tools can help you prevent glare from getting into the eyes, which is very important to protect your eyes.

✨ Fit for most occasions: the eye care tools are suitable for children to learn how to play, which is very suitable for a variety of sports.

RELATED INFO:✨ Instrument parts accessories: the eye care tools are designed with a wide range of uses, which can be used to help you learn how to play and improve your child's vision.

✨ Insufficiency tool: sufficiency tool can help prevent the insufficiency from falling into the eyes, and provide you with a clear view.