Does it come with instructions?

Yes it comes with instructions both with the product and again digitally by email.

does it improve my reaction time ?

We used these for my daughter to help her eyes work together. It was suggested by her vision therapist. I played around with it also and you do get better at focusing.

Are the balls removable?

You could fairly easily remove them by untying the knot at the end of the string. However it may be tricky to put them back on.

Can this be used in the bedroom?

Hi, Brock String is a vision performance training tool that can be used anywhere.

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Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

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Brock String, Vision Convergence Insufficiency Training Tool for Eye Muscle Strengthening, Focus Exercise and Agility

Brock String, Vision Convergence Insufficiency Training Tool for Eye Muscle Strengthening, Focus Exercise and Agility

Product ID: 294748062

Details

Brand
Brock String
Material
Nylon (PP)
Recommended uses for product
Exercise and
Special features
Durable
Target audience
Adult

⚽5 beads for multi-angle focus drills

💪Durable nylon-polypropylene build

📏6-foot length for versatile training

€ 31.51

Duties & taxes included

In stock

Sold byAmazon SpainDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

👁️‍🗨️ Sharpen your focus, strengthen your vision, own the game!

BUILT TO LAST - Premium durable materials ensure long-lasting, reliable training sessions.
BOOST YOUR GAME - Enhance sports performance by strengthening eye muscles in sport-specific positions.
TRAIN LIKE A PRO - 6-foot string with 5 precision beads targets eye convergence for peak athletic focus.
EFFORTLESS MASTERY - Simple setup and quick learning curve make it perfect for home use anytime.
CLINICALLY APPROVED - Endorsed by vestibular physiotherapists for effective convergence insufficiency therapy.

The Brock String is a 6-foot durable eye training tool featuring 5 tightly fitted beads designed to improve convergence insufficiency and enhance athletic eye muscle performance. Easy to use at home with clinical endorsements, it offers a practical, high-quality solution for vision agility and focus exercises.

Specifications

ASIN	B0190LOMCQ
Best Sellers Rank	#33,100 in Sporting Goods ( See Top 100 in Sporting Goods ) #4 in Archery Bowstrings
Brand	Brock String
Brand Name	Brock String
Color	White
Customer Reviews	4.5 out of 5 stars 1,094 Reviews
Grip Material	Ethylene Vinyl Acetate Foam
Handle Diameter	38 month
Handle Material	Ethylene Vinyl Acetate (EVA)
Handle material	Ethylene Vinyl Acetate (EVA)
Item Length	6 Feet
Item Weight	0.02 Kilograms
Manufacturer	NeuroVision
Material	Nylon Polypropylene (PP)
Model Number	9G-WVV7-SZRG
Other Special Features of the Product	Durable
Part Number	9G-WVV7-SZRG
Recommended Uses For Product	Exercise and Fitness
Recommended uses for product	Exercise and Fitness
Special features	Durable
Target Audience	Adult
Target audience	Adult
UPC	860007923074 722512440333
Unit Count	1 Count

Reviews

S**H

Received in a good condition

It arrived in a good condition, both the bead and the string are of good quality. The bead also doesn't shift easily so it is great!

8.02.2020

J**Y

As Advertised

Approved by my vestibular physiotherapist

7.07.2026

J**E

Good quality, balls don't slide easily and string stays taut

This Brock string is much better quality than I expected. It's not medical grade, but the balls don't easily slide around when you're using it; they stay in place. But they are also easily adjustable for multiple exercises. The string is kind of a plastic string material, so it can stay pretty taut, which is necessary for the eye exercises it's used for. It's easy to tie and untie. I just tie it to a cabinet handle, and it works great!

9.09.2024

G**A

Approvato

Prodotto come promesso. Ottimo.

21.06.2019

G**N

Rope too thin compared to the balls

When I use the brock string, the bill moves on the cord.

10.06.2026

Common Questions

Are the products genuine and authentic?+

Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

How long does delivery take and is it reliable?+

Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

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How is product pricing calculated?+

Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Abdullah B.

Great price for an authentic product. Fast international shipping too!

3 weeks ago

Zainab N.

Fantastic and great service. Shipping was faster than expected.

1 week ago

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