--- product_id: 294748062 title: "Brock String, Vision Convergence Insufficiency Training Tool for Eye Muscle Strengthening, Focus Exercise and Agility" brand: "brock string" price: "₨492" currency: SCR in_stock: true reviews_count: 5 category: "Brock String" url: https://www.desertcart.sc/products/294748062-brock-string-vision-convergence-insufficiency-training-tool-for-eye-muscle store_origin: SC region: Seychelles --- # 5 beads for multi-angle focus drills 6-foot length for versatile training Durable nylon-polypropylene build Brock String, Vision Convergence Insufficiency Training Tool for Eye Muscle Strengthening, Focus Exercise and Agility **Brand:** brock string **Price:** ₨492 **Availability:** ✅ In Stock ## Summary > 👁️‍🗨️ Sharpen your focus, strengthen your vision, own the 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?** ₨492 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.sc](https://www.desertcart.sc/products/294748062-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 - • **Premium Durability:** Crafted with high-quality materials built to last through intense sessions - • **Effortless Home Use:** Quick setup and intuitive design for seamless daily practice - • **Athletic Edge Booster:** Enhance sports performance through focused eye agility drills - • **Complete Guidance Included:** Step-by-step instructions ensure you maximize every workout - • **Precision Eye Muscle Training:** Target convergence insufficiency with pro-level accuracy ## Overview The Brock String is a 6-foot durable eye training tool featuring 5 adjustable beads designed to improve convergence insufficiency and boost athletic eye performance. Made from high-quality nylon-polypropylene, it offers easy home use with included instructions, making it a must-have for professionals seeking enhanced visual agility and focus. ## Description You'll simply love just how easy this Brock String is to use! This Brock String is 6 feet long and comes with 5 beads that fit nicely on the string so you can train convergence at different angles. All you have to do is hold an end against your nose, and try to bring your eyes together at the center of each bead. Click 'Add to Cart' now! Review: Received in a good condition - It arrived in a good condition, both the bead and the string are of good quality. The bead also doesn't shift easily so it is great! 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. ## Features - IMPROVES 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 5 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 | B0190LOMCQ | | Brand | Brock String | | Brand Name | Brock String | | Color | White | | Customer Reviews | 4.5 out of 5 stars 1,084 Reviews | | Grip Material | Ethylene Vinyl Acetate Foam | | Handle Diameter | 38 month | | Handle Material | Ethylene Vinyl Acetate (EVA) | | Handle material | Ethylene Vinyl Acetate (EVA) | | Item Length | 6 Feet | | Item Weight | 0.02 Kilograms | | Manufacturer | NeuroVision | | Material | Nylon Polypropylene (PP) | | Model Number | 9G-WVV7-SZRG | | Other Special Features of the Product | Durable | | Part Number | 9G-WVV7-SZRG | | Recommended Uses For Product | Exercise and Fitness | | Recommended uses for product | Exercise and Fitness | | Special features | Durable | | Target Audience | Adult | | Target audience | Adult | | UPC | 860007923074 722512440333 | | Unit Count | 1 Count | ## Product Details - **Brand:** Brock String - **Material:** Nylon Polypropylene (PP) - **Recommended uses for product:** Exercise and Fitness - **Special features:** Durable - **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/513qIyNgBPL.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/615dTbVdzbL.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/51od-gk8pjL.jpg) ![Brock String, Vision Convergence Insufficiency Training Tool for Eye Muscle Strengthening, Focus Exercise and Agility - Image 4](https://m.media-amazon.com/images/I/61lJnrLSL-L.jpg) ![Brock String, Vision Convergence Insufficiency Training Tool for Eye Muscle Strengthening, Focus Exercise and Agility - Image 5](https://m.media-amazon.com/images/I/61BKsBy53-L.jpg) ## 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. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Received in a good condition *by S***H on 8 February 2020* It arrived in a good condition, both the bead and the string are of good quality. The bead also doesn't shift easily so it is great! ### ⭐⭐⭐⭐⭐ Good quality, easy to use *by J***B on 2 December 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. ### ⭐⭐⭐⭐⭐ Approvato *by G***A on 21 June 2019* Prodotto come promesso. Ottimo. ## 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.sc/products/294748062-brock-string-vision-convergence-insufficiency-training-tool-for-eye-muscle](https://www.desertcart.sc/products/294748062-brock-string-vision-convergence-insufficiency-training-tool-for-eye-muscle) --- *Product available on Desertcart Seychelles* *Store origin: SC* *Last updated: 2026-06-18*