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.

Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

Help Track order

Account Cart

Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

Help Track order

Account Cart

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: 24534652

Details

Brand
Brock String
Material
Nylon (PP)
Recommended Uses For Product
Exercise and
Special Feature
Durable
Target Audience
Adult

🎯6 ft precision training length

🧵Durable nylon & polypropylene string

🏋️‍♂️Strengthens eye muscles & focus

Buy anything from 5,000+ international stores. One checkout price. No surprise fees. Join 2M+ shoppers on Desertcart.

€ 17.30

Duties & taxes included

In stock

Sold byAmazon LithuaniaDelivered 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 Lithuania.

Secure transaction

Description

👁️‍🗨️ See the difference, own the game.

SHARPER VISION SHARPER EDGE - Boost your eye muscle strength and convergence for unbeatable focus in sports and daily life.
PRO LEVEL VISUAL COORDINATION - Enhance hand-eye coordination and depth perception to outplay the competition.
EFFORTLESS SETUP INSTANT GAINS - Simple to use with a short learning curve—start training your eyes anytime, anywhere.
BUILT TO LAST BUILT FOR RESULTS - Premium durable string and high-quality beads ensure consistent performance session after session.
GUIDED TRAINING FOR MAXIMUM IMPACT - Includes clear instructions so you train smarter, not harder, and see real improvements fast.

The Brock String is a 6-foot durable eye training tool designed to strengthen eye muscles, improve convergence, and enhance focus. Crafted with high-quality nylon string and beads, it supports vision exercises for athletes and professionals seeking better hand-eye coordination and depth perception. Easy to set up and use, it comes with clear instructions to maximize training effectiveness at home or on the go.

Specifications

ASIN	B0190LOMCQ
Brand Name	Brock String
Color	White
Customer Reviews	4.5 4.5 out of 5 stars (2,137)
Grip Material	Ethylene Vinyl Acetate Foam
Handle Diameter	38 month
Handle Material	Ethylene Vinyl Acetate (EVA)
Item Length	6 Feet
Item Weight	0.02 Kilograms
Manufacturer	Thera Systems LLC
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
Target Audience	Adult
UPC	860007923074 722512440333
Unit Count	1.00 Count

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.

What is Desertcart? Is it safe to order from?+

Desertcart is an international e-commerce platform operating since 2014. We securely process thousands of orders globally each day. Every product goes through our quality verification process before delivery, and we provide end-to-end order tracking, 24/7 customer support, and a comprehensive returns policy to ensure a safe shopping experience.

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

Anjali K.

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

1 month ago

Sneha T.

Received my product in pristine condition. Great service overall.

1 month ago

View all Trustpilot reviews

Shop Global, Save with Desertcart

Value for Money

Competitive prices on a vast range of products

Shop Globally

Serving millions of shoppers across more than 100 countries

Enhanced Protection

Trusted payment options loved by worldwide shoppers

Customer Assurance

Trusted payment options loved by worldwide shoppers.

Desertcart App

Shop on the go, anytime, anywhere.

Buy anything from 5,000+ international stores. One checkout price. No surprise fees. Join 2M+ shoppers on Desertcart.

€ 17.30

Duties & taxes included

In stock

Sold byAmazon LithuaniaDelivered 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 Lithuania.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Abdullah B.

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

3 weeks ago

Sneha T.

Received my product in pristine condition. Great service overall.

1 month ago

View all Trustpilot reviews