---
product_id: 24534652
title: "Vision Convergence Insufficiency Training Tool for Eye Muscle Strengthening, Focus Exercise and Agility"
brand: "brock string"
price: "€ 15.57"
currency: EUR
in_stock: true
category: "Brock String"
url: https://www.desertcart.pt/products/24534652-vision-convergence-insufficiency-training-tool-for-eye-muscle-strengthening-focus
store_origin: PT
region: Portugal
---

# easy setup for quick daily use 6 ft precision training length durable, high-quality beads & string Vision Convergence Insufficiency Training Tool for Eye Muscle Strengthening, Focus Exercise and Agility

**Brand:** brock string
**Price:** € 15.57
**Availability:** ✅ In Stock

## Summary

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

## Quick Answers

- **What is this?** Vision Convergence Insufficiency Training Tool for Eye Muscle Strengthening, Focus Exercise and Agility by brock string
- **How much does it cost?** € 15.57 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/24534652-vision-convergence-insufficiency-training-tool-for-eye-muscle-strengthening-focus)

## 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

- • **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.

## Overview

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.

## Description

Buy Brock String, Vision Convergence Training Tool, 6 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 | 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 |

## Product Details

- **Brand:** Brock String
- **Handle Material:** Ethylene Vinyl Acetate (EVA)
- **Recommended Uses For Product:** Exercise and Fitness
- **Special Feature:** Durable
- **Target Audience:** Adult

## Images

![Vision Convergence Insufficiency Training Tool for Eye Muscle Strengthening, Focus Exercise and Agility - Image 1](https://m.media-amazon.com/images/I/513qIyNgBPL.jpg)

## Available Options

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

## Questions & Answers

**Q: Does it come with instructions?**
A: Yes it comes with instructions both with the product and again digitally by email.

**Q: does it improve my reaction time ?**
A: 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.

**Q: Are the balls removable?**
A: 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.

**Q: Can this be used in the bedroom?**
A: Hi, Brock String is a vision performance training tool that can be used anywhere.

## Frequently Bought Together

- Brock String - Vision Convergence Training - Convergence Insufficiency Tool - Train Vision, Athletic Performance, and More!, White, 6 foot
- Brock String 10 Foot Vision Convergence Training Tool - Train Vision, Improve Strength & Athletic Performance, and More!
- DEFINEST Rechargeable LED Laser Headlamp with an Adjustable Waist Belt, for Sensorimotor Control Testing and Physical Therapy

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.pt/products/24534652-vision-convergence-insufficiency-training-tool-for-eye-muscle-strengthening-focus](https://www.desertcart.pt/products/24534652-vision-convergence-insufficiency-training-tool-for-eye-muscle-strengthening-focus)

---

*Product available on Desertcart Portugal*
*Store origin: PT*
*Last updated: 2026-10-27*