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 Training Tool, 6 Ft with 5 Beads, White | For Insufficiency, Eye Muscle Strengthening, Focus Exercise and Agility

Product ID: 24534652

Details

Brand
Brock String
Handle Material
Ethylene Vinyl
Recommended Uses For Product
Exercise and
Special Feature
Durable
Target Audience
Adult

⚡easy setup for quick daily use

🎯6 ft precision training length

💪durable, high-quality beads & string

฿1059

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In stock

Sold byAmazon ThailandDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

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

GUIDED FOR SUCCESS - Includes clear, expert instructions so you maximize every session with confidence.
BOOST ATHLETIC EDGE - Sport-specific eye muscle training enhances visual coordination and competitive performance.
CLINICALLY TRUSTED TOOL - Proven method to strengthen eye muscles and reduce double vision with consistent use.
ENGINEERED FOR ENDURANCE - Premium durable string and beads built to withstand repeated, intense vision workouts.
SHARPEN YOUR FOCUS ANYTIME - Simple, quick setup lets you train convergence and eye agility at home or on the go.

The Brock String is a 6-foot vision convergence training tool designed to strengthen eye muscles, improve focus, and enhance visual agility. Crafted with durable materials and high-quality beads, it supports both beginners and advanced users with easy setup and clear instructions. Ideal for athletes and professionals seeking to boost visual performance and reduce eye strain, this tool is a trusted solution for convergence insufficiency and eye muscle strengthening.

Specifications

ASIN	B0190LOMCQ
Best Sellers Rank	#6,190 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #8,651 in Exercise & Fitness Equipment
Brand	Brock String
Brand Name	Brock String
Color	White
Customer Reviews	4.5 out of 5 stars 2,208 Reviews
Grip Material	Ethylene Vinyl Acetate Foam
Handle Diameter	38 month
Handle Material	Ethylene Vinyl Acetate (EVA)
Item Highlight	For Insufficiency, Eye Muscle Strengthening, Focus Exercise and Agility
Item Length	6 feet
Item Weight	0.02 kg
Manufacturer	Thera Systems LLC
Model Number	9G-WVV7-SZRG
Number of Packs	1
Other Special Features of the Product	Durable
Part Number	9G-WVV7-SZRG
Recommended Uses For Product	Exercise and Fitness
Special Feature	Durable
Target Audience	Adult
UPC	860007923074 722512440333
Unit Count	1 count

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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.

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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.

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฿1059

Duties & taxes included

In stock

Sold byAmazon ThailandDelivered 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 Thailand.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

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The MOLLE sheath is of exceptional quality. Very happy with my purchase.

2 weeks ago

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Received my product in pristine condition. Great service overall.

1 month ago

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