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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👁️‍🗨️ See the difference, own the game!

BUILT TO LAST - Premium durable string and beads ensure consistent performance session after session.
TRAIN LIKE A PRO - Optimize your eye convergence to boost athletic performance and reduce visual fatigue.
EFFORTLESS HOME USE - Quick learning curve means you can start training your vision anytime, anywhere.
SPORT SPECIFIC PRECISION - 6-foot string with 5 beads lets you simulate real-game eye focus scenarios effortlessly.
UNLOCK YOUR ATHLETIC EDGE - Enhance strength and coordination with a tool trusted by vision therapists and athletes alike.

The Brock String is a 6-foot vision convergence training tool featuring 5 tight-fitted beads made from durable materials. Designed to improve eye strength, convergence, and athletic performance, it offers an easy-to-use, high-quality solution for vision training at home or on the go.

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TrustScore 4.5 | 7,300+ reviews

Neha S.

Excellent communication throughout the order process. Product is perfect.

2 weeks ago

Suresh K.

Very impressed with the quality and fast delivery. Will shop here again.

4 days ago

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Color	White
Size	6 foot
Material type	Plastic Rubber Metal
Features	Durable
Batteries included?	No
Brand	Brock String
Manufacturer	Brock String
Item model number	9G-WVV7-SZRG
Package Dimensions	11.9 x 9 x 2.7 cm; 18 g
ASIN	B0190LOMCQ

Brock String - Vision Convergence Training Tool - Train Vision, Improve Strength & Athletic Performance, and More!

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