---
product_id: 30504313
title: "Brock String, Vision Convergence Insufficiency Training Tool for Eye Muscle S..."
brand: "brock string"
price: "€ 14.45"
currency: EUR
in_stock: null
reviews_count: 13
category: "Brock String"
url: https://www.desertcart.pt/products/30504313-brock-string-vision-convergence-insufficiency-training-tool-for-eye-muscle
store_origin: PT
region: Portugal
---

# 6-foot precision string 3 durable, tight-fitted beads Strengthens eye muscles & focus Brock String, Vision Convergence Insufficiency Training Tool for Eye Muscle S...

**Brand:** brock string
**Price:** € 14.45
**Availability:** ❌ Out of Stock

## Summary

> 👁️‍🗨️ Sharpen your sight, own your game.

## Quick Answers

- **What is this?** Brock String, Vision Convergence Insufficiency Training Tool for Eye Muscle S... by brock string
- **How much does it cost?** € 14.45 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/30504313-brock-string-vision-convergence-insufficiency-training-tool-for-eye-muscle)

## Best For

- brock string enthusiasts

## Why This Product

- Trusted brock string brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Boost Athletic Edge:** Enhance convergence, depth perception, and hand-eye coordination for superior sports performance.
- • **Guided Training Included:** Clear instructions ensure you maximize every session with confidence.
- • **Durable Design Built to Last:** Premium string and beads withstand repeated use without wear.
- • **Elite Vision Training at Home:** Simple setup with a short learning curve—train anytime, anywhere.
- • **Precision Beads for Targeted Focus:** Three high-quality beads slide smoothly yet stay put for exact eye alignment.

## Overview

The Brock String is a 6-foot vision training tool featuring 3 durable beads designed to strengthen eye muscles, improve convergence, and enhance focus. Ideal for athletes and vision therapy users, it offers easy home use with included instructions, combining high-quality materials and precise design to boost hand-eye coordination and depth perception.

## Description

Take your vision and athletic performance to the next level with the Brock String, a versatile sight adjustment tool designed for hand eye coordination training, vision exercise, and depth perception training. Ideal for athletes, hobbyists, and anyone looking to improve visual skills, this tool strengthens eye muscles while enhancing focus and precision. By practicing with the Brock String, you can enhance eye tracking, alignment, and coordination, giving you a competitive edge in sports or daily activities that demand sharp vision. Setup is simple and intuitive, making this vision exercise tool suitable for both beginners and advanced users. The durable string and high-quality beads provide long-lasting performance, ensuring consistent results over repeated sessions. A clear, included instruction guide walks you through proper use and tips to maximize your training, so you can confidently practice at home or in the gym.

Review: Good quality, easy to use - It's good. The beads slide easily but stay where you put them. The string is easy to tie and untie. The string can be drawn taunt and bounce is easily controlled.
Review: Good quality and helpful. - It does exactly what it is supposed to do. It is of good quality and has been helpful.

## Features

- Convergence & Performance: Convergence training using a Brock String can be useful for convergence insufficiency, as well as strength and athletic performance.
- Sports Performance: With a 6-foot long string and 3 tight-fitted beads, this Brock String is great for training the eyes in sport-specific positions – giving you the ultimate athletic edge.
- Easy To Use: You can use Brock String right from the comfort of your home with a very short learning curve involved.
- High Quality: This Brock String is designed with an extremely high quality, and highly durable string and beads.
- Instructions Included

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B01AZYTTPC |
| Brand Name | Brock String |
| Customer Reviews | 4.5 4.5 out of 5 stars (2,086) |
| Date First Available | January 23, 2016 |
| Item Package Dimensions L x W x H | 4.13 x 3.86 x 0.59 inches |
| Manufacturer | Thera Systems LLC |
| Package Weight | 0.02 Kilograms |
| Part Number | NX-TI65-VMCX |
| Size | 6 Ft with 3 Beads |
| Style | Pack of 1 |

## Images

![Brock String, Vision Convergence Insufficiency Training Tool for Eye Muscle S... - Image 1](https://m.media-amazon.com/images/I/71aLri4CfSL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Good quality, easy to use
*by J***B on December 2, 2025*

It's good. The beads slide easily but stay where you put them. The string is easy to tie and untie. The string can be drawn taunt and bounce is easily controlled.

### ⭐⭐⭐⭐⭐ Good quality and helpful.
*by A***R on November 17, 2025*

It does exactly what it is supposed to do. It is of good quality and has been helpful.

### ⭐⭐⭐⭐⭐ Great for eye convergence
*by C***D on January 7, 2026*

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.

## Frequently Bought Together

- Brock String 6 Foot with 3 Beads - Vision Convergence Training - Convergence Insufficiency Tool - Train Vision, Athletic Performance, and More!
- 2 Strabismus Correction Cards, Improve Visual Sense Amblyopia Coated Paper Training Cards with Red and Green Bars
- Brock String - Vision Convergence Training - Convergence Insufficiency Tool - Train Vision, Athletic Performance, and More!, White, 6 foot

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*Product available on Desertcart Portugal*
*Store origin: PT*
*Last updated: 2026-02-03*