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.

Brock String Vision Convergence Insufficiency Training Tool For Eye Muscle

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

Help Track order

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MX$1095

Duties & taxes included

In stock

Sold byAmazon MexicoDelivered 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 nylon and polypropylene ensure durability through intense sessions
TRAIN LIKE A PRO - 6-foot string with 5 beads for sport-specific eye muscle workouts
THERAPIST APPROVED - Endorsed by vestibular physiotherapists for effective vision training
BOOST ATHLETIC EDGE - Enhance convergence and eye agility to outperform competitors
EFFORTLESS HOME USE - Simple setup with minimal learning curve—train anytime, anywhere

The Brock String is a 6-foot long vision training tool featuring 5 durable beads designed to improve eye muscle strength, convergence, and focus. Ideal for athletes and vision therapy, it offers easy home use with therapist-approved effectiveness, crafted from high-quality materials for lasting performance.

Specifications

ASIN	B0190LOMCQ
Best Sellers Rank	#12,413 in Sporting Goods ( See Top 100 in Sporting Goods ) #1 in Archery Bowstrings
Brand	Brock String
Brand Name	Brock String
Color	White
Customer Reviews	4.5 out of 5 stars 1,116 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
Number of Items	1
Number of Packs	1
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

C**L

Enfoque

Funciona bien.

18.07.2026

C**D

Great for eye convergence

This string provides a means to work on convergence problems. I have excellent vision in my eyes but when I'm tired etc. I start seeing double --especially watching the television. I can see improvement after just a few sessions of the exercises. Hopefully before long I will no longer have the problem. Comes with instructions in English! They just don't indicate how long one should do them. If you get one, practice at least a few minutes at a time.

7.01.2026

G**A

Approvato

Prodotto come promesso. Ottimo.

21.06.2019

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Trustpilot

TrustScore 4.5 | 7,300+ reviews

Zainab N.

Fantastic and great service. Shipping was faster than expected.

1 week ago

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Very reliable shop with genuine products. Will definitely buy again!

2 weeks ago

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