Will this improve bad case of myopia in adolescent?

This device improves depth perception, the ability of both eyes to focus at the same distance. Myopia is the inability to see beyond a given (near) distance. This may help improve myopia, but is not the intention. I use it to improve my focus n the front sight of my air rifle.

Will this exercise help achieve fusion if the eyes are slightly turned inwards, rather than outwards?

If you believe the research, based on how it works, all eye muscles should be strengthened. I bough it to help me to hopefully correct my blurred Red Dot. It took about 8 weeks before I noticed a change. Good Luck.

How long do you needto do this to get results?

I really don't know. I've been doing it for a few months--a regular, brief daily routine--along with remembering to be aware of seeing out of both eyes, rather than ignoring my lazy eye. Don't know how long it will take to get results -- but I think of the words of my meditation teacher when asked a similar question: "try it for a couple of years and see what you think . . ." Good luck and if it's not helping, check out the book, 'Fixing My Gaze'. There's some good information in there.

Does this fix eye asymmetry?

Hi, This product is intended for convergence training where the eyes work together to perform convergence at each bead.

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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: 254108556

Details

Brand
Brock String
Material
Plastic
Recommended uses for product
Exercise and
Special features
Perlenbesetzt
Target audience
Adult

🎯5 tightly fitted beads for precise focus points

💪Durable high-quality string for consistent use

📏10-foot length for versatile training

COP 119323

Duties & taxes included

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Sold byAmazon ColombiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

👁️‍🗨️ See sharper, perform stronger — don’t blink and miss out!

BUILT TO LAST - High-quality, durable string designed for daily eye muscle workouts
BOOST YOUR GAME - Ideal for sports vision training and improving eye agility under pressure
PRECISION FOCUS - 5 vibrant beads create clear, measurable convergence targets
TRAIN LIKE A PRO - 10-foot length lets you master mid-distance eye focus with ease
COMPLETE GUIDANCE - Includes easy-to-follow instructions to maximize your vision training

The Brock String is a 10-foot vision training tool featuring 5 tightly fitted beads on a durable string, designed to strengthen eye muscles and improve focus. Perfect for convergence insufficiency therapy and sports vision enhancement, it comes with clear instructions to help you train effectively and elevate your visual performance.

Specifications

ASIN	B01MEFCDD1
Best Sellers Rank	#20,791 in Sporting Goods ( See Top 100 in Sporting Goods ) #57 in Racket Strings
Brand	Brock String
Brand Name	Brock String
Color	White
Customer Reviews	4.4 out of 5 stars 731 Reviews
Grip Material	Plastic
Handle Material	Plastic
Handle material	Plastic
Item Length	10 Feet
Item Weight	0.02 Kilograms
Manufacturer	NeuroVision
Material	Plastic
Model Number	7.22512E+11
Number of Items	1
Number of Packs	1
Other Special Features of the Product	Beaded
Part Number	7.22512E+11
Recommended Uses For Product	Exercise and Fitness
Recommended uses for product	Exercise and Fitness
Special features	Beaded
Target Audience	Adult
Target audience	Adult
UPC	722512368781 860007923081
Unit Count	1.0 Count

Reviews

F**S

…

Bom

6.06.2026

S**O

A good length of string.

Broc strings require patience and consistency of use. This one, unlike most on the market, is actually of a decent length, long enough for those of us training our eyes to see at mid-distance. One word of caution: don't be tempted to remove or rearrange the balls, as it is almost impossible to thread them back on the string. Good value. Give it a try!

1.09.2025

A**N

Disappointing

Instructions were not included as specified in the product details. Disappointing

9.05.2025

W**N

Troppo caro per un cordino e 5 pallini di plastica colorata

È utile ma vale un decimo del prezzo che l'ho pagata. Potete farvela da soli

7.12.2025

A**E

Fehlerhafte Beschreibung und irreführende Produktbilder

Keine Anleitung wie in der Beschreibung dabei gewesen. Auch waren nur 3 Perlen mit dabei und keine 5 wie auf den Abbildungen.

23.06.2026

Common Questions

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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

Zainab N.

Fantastic and great service. Shipping was faster than expected.

1 week ago

Anjali K.

The product quality is outstanding. Exactly what I needed for my work.

1 month ago

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COP 119323

Duties & taxes included

In stock

Sold byAmazon ColombiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Colombia.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Rajesh P.

Customer service was outstanding when I had questions about the product.

2 days ago

Yusuf A.

Fantastic experience overall. Will recommend to friends and family.

1 month ago

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