---
product_id: 38669120
title: "Brock String, Vision Convergence Insufficiency Training Tool for Eye Muscle Strengthening, Focus Exercise and Agility"
brand: "brock string"
price: "NT$594"
currency: TWD
in_stock: true
reviews_count: 13
category: "Brock String"
url: https://www.desertcart.tw/products/38669120-brock-string-vision-convergence-insufficiency-training-tool-for-eye-muscle
store_origin: TW
region: Taiwan
---

# Precision eye muscle training Boosts athletic visual coordination Durable nylon string with quality beads Brock String, Vision Convergence Insufficiency Training Tool for Eye Muscle Strengthening, Focus Exercise and Agility

**Brand:** brock string
**Price:** NT$594
**Availability:** ✅ In Stock

## Summary

> 👁️‍🗨️ See the difference, own the advantage.

## Quick Answers

- **What is this?** Brock String, Vision Convergence Insufficiency Training Tool for Eye Muscle Strengthening, Focus Exercise and Agility by brock string
- **How much does it cost?** NT$594 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.tw](https://www.desertcart.tw/products/38669120-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

- • **Athlete-Approved Visual Edge:** Train in sport-specific positions to elevate hand-eye coordination and reaction time.
- • **Guided Training for Maximum Gains:** Includes clear instructions to optimize your vision exercises and track progress confidently.
- • **Built to Last, Designed to Perform:** Premium nylon string and high-quality beads ensure consistent, long-term training reliability.
- • **Effortless Setup, Instant Practice:** Simple to use at home or gym with a quick learning curve for all skill levels.
- • **Sharpen Your Focus, Sharpen Your Game:** Enhance eye convergence and visual precision for daily tasks and competitive sports.

## Overview

The Brock String is a professional-grade vision training tool designed to strengthen eye muscles, improve convergence, and boost focus. Ideal for athletes and vision therapy users, it features a durable 10-foot nylon string with 5 high-quality beads, enabling precise eye coordination exercises. Easy to set up and use, it comes with clear instructions to help users enhance visual performance and depth perception, making it a must-have for anyone serious about sharpening their sight and athletic edge.

## Description

Product description

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: Great for eye convergence - 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.

## Features

- ENHANCE CONVERGENCE AND FOCUS: Use the Brock String convergence training tool to strengthen eye muscles, focus, and support visual performance for daily activities and sports
- BOOST ATHLETIC PERFORMANCE: The Brock eye string allows precise eye training in sport-specific positions, giving you a competitive edge and enhanced visual coordination
- EASY-TO-USE EYE EXERCISE TOOL: Simple setup and short learning curve let you practice convergence and eye focus exercises at home, making vision training convenient for beginners and advanced users
- PREMIUM FOCUS STRING WITH BALLS: Crafted with durable string and high-quality beads, this eye muscle strengthening tool ensures long-lasting use and consistent performance for repeated vision exercises
- FRONT SIGHT TOOL WITH INSTRUCTIONS INCLUDED: Comes with clear guidance and tips for proper use, ensuring effective training and helping you get the most from your Brock String sessions

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B01MEFCDD1 |
| Best Sellers Rank | #12,234 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #26 in Reflective Gear |
| Brand | Brock String |
| Brand Name | Brock String |
| Color | White |
| Customer Reviews | 4.5 out of 5 stars 2,124 Reviews |
| Grip Material | Plastic |
| Handle Material | Plastic |
| Item Length | 120 Inches |
| Item Weight | 0.02 Kilograms |
| Manufacturer | Thera Systems LLC |
| Material | Nylon |
| Model Number | 7.22512E+11 |
| Part Number | 7.22512E+11 |
| Target Audience | Adult |
| UPC | 722512368781 860007923081 |
| Unit Count | 1.0 Count |

## Product Details

- **Brand:** Brock String
- **Color:** White
- **Handle Material:** Plastic
- **Material:** Nylon
- **Target Audience:** Adult

## Images

![Brock String, Vision Convergence Insufficiency Training Tool for Eye Muscle Strengthening, Focus Exercise and Agility - Image 1](https://m.media-amazon.com/images/I/615dTbVdzbL.jpg)
![Brock String, Vision Convergence Insufficiency Training Tool for Eye Muscle Strengthening, Focus Exercise and Agility - Image 2](https://m.media-amazon.com/images/I/619gq0eFnDL.jpg)
![Brock String, Vision Convergence Insufficiency Training Tool for Eye Muscle Strengthening, Focus Exercise and Agility - Image 3](https://m.media-amazon.com/images/I/61BKsBy53-L.jpg)

## Available Options

This product comes in different **Size, Style** options.

## Questions & Answers

**Q: Will this improve bad case of myopia in adolescent?**
A: 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.

**Q: Will this exercise help achieve fusion if the eyes are slightly turned inwards, rather than outwards?**
A: 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.

**Q: How long do you needto do this to get results?**
A: 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.

**Q: Does this fix eye asymmetry?**
A: Hi,

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

## 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.

### ⭐⭐⭐⭐⭐ 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.

### ⭐⭐⭐⭐⭐ 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.

## Frequently Bought Together

- Brock String 10 Foot Vision Convergence Training Tool - Train Vision, Improve Strength & 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 Taiwan*
*Store origin: TW*
*Last updated: 2026-05-17*