---
product_id: 38669120
title: "Brock String, Vision Convergence Insufficiency Training Tool for Eye Muscle Strengthening, Focus Exercise and Agility"
brand: "brock string"
price: "230 kr"
currency: NOK
in_stock: true
category: "Brock String"
url: https://www.desertcart.no/products/38669120-brock-string-vision-convergence-insufficiency-training-tool-for-eye-muscle
store_origin: NO
region: Norway
---

# 120-inch precision training string Durable nylon & high-quality beads Boosts eye muscle strength & focus Brock String, Vision Convergence Insufficiency Training Tool for Eye Muscle Strengthening, Focus Exercise and Agility

**Brand:** brock string
**Price:** 230 kr
**Availability:** ✅ In Stock

## Summary

> 👁️‍🗨️ Sharpen your sight, dominate your game!

## 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?** 230 kr with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.no](https://www.desertcart.no/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

- • **Built to Last:** Premium nylon string and sturdy beads ensure durability through countless sessions
- • **Athlete-Approved Focus:** Enhances eye muscle strength and visual coordination for a competitive edge
- • **Effortless Setup & Use:** Simple, intuitive design with clear instructions for beginners and pros alike
- • **Train Anytime, Anywhere:** Compact, lightweight tool perfect for home, gym, or on-the-go vision workouts
- • **Precision Vision Training:** 120-inch length for targeted convergence exercises

## Overview

The Brock String is a professional-grade eye muscle strengthening and focus training tool featuring a 120-inch durable nylon string with high-quality beads. Designed to improve convergence, eye tracking, and visual coordination, it’s ideal for athletes and vision enthusiasts seeking enhanced performance. Easy to set up and use with included instructions, this lightweight tool supports consistent vision training at home or on the move.

## Description

Buy Brock String, Vision Convergence Training Tool, 10 Ft with 5 Beads, White | For Insufficiency, Eye Muscle Strengthening, Focus Exercise and Agility: Eye Protection Accessories - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

## 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 | #3,901 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #21 in Strength Training Equipment Attachments |
| Brand | Brock String |
| Brand Name | Brock String |
| Color | White |
| Customer Reviews | 4.5 out of 5 stars 2,209 Reviews |
| Grip Material | Plastic |
| Handle Material | Plastic |
| Item Highlight | For Insufficiency, Eye Muscle Strengthening, Focus Exercise and Agility |
| Item Length | 120 inches |
| Manufacturer | Thera Systems LLC |
| Material | Nylon |
| Model Number | 7.22512E+11 |
| Other Special Features of the Product | Beaded |
| Part Number | 7.22512E+11 |
| Recommended Uses For Product | Exercise and Fitness |
| Special Feature | Beaded |
| Target Audience | Adult |
| UPC | 722512368781 860007923081 |
| Unit Count | 1 Count |

## Product Details

- **Brand:** Brock String
- **Material:** Nylon
- **Recommended Uses For Product:** Exercise and Fitness
- **Special Feature:** Beaded
- **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)

## 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.

## 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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**Shop now:** [https://www.desertcart.no/products/38669120-brock-string-vision-convergence-insufficiency-training-tool-for-eye-muscle](https://www.desertcart.no/products/38669120-brock-string-vision-convergence-insufficiency-training-tool-for-eye-muscle)

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*Product available on Desertcart Norway*
*Store origin: NO*
*Last updated: 2026-10-26*