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.
Product sellpoints
Lens technology: The lens is made of high-quality pc material, which can effectively reduce the impact force of light transmission and protect the eyes.
Easy to transport: The insufficiency tool is lightweight and easy to carry. it can be used for a long time without taking up too much space.
Recommended seller: It is the best seller in the industry. if you have any questions, please feel free to contact us and we will provide satisfactory service.
Processing time
According your order list. we will supply delivery time .
Commonly is 5-7 work days after we confirm payment
Shipping time
By Express : 3-7 days . Door to door service
By Air : 3-7 days . (the goods arrival at your local air ports
By sea : 30-40 days (the goods arrival at your local sea ports )
PS : by air or by sea, if you need door to door service, please tell us . we will help you checking the extra door to door cost.
How many months warranty do you provide ?
one year
What should I do if the machine have question ?
For ensuring all the items are in good quality, we will test all products before the packages were sent out. Once the machine have some question, please don't worry. kindly send us some images of the situation , Video and machine series, and explain the question in where . we will supply solution to you deal soon.
What should I do if the spare parts is broken in Warranty ?
If in Warranty, some spare parts broken in the Use. kindly supply picture or video , and machine series number .
We will send the spare parts by express to you soon.. and we bear express cost .
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1Set Children Training Diameter String Vision Convergence Insufficiency Tool Eye Care Tools New