--- product_id: 50773397 title: "Brock String, Vision Convergence Insufficiency Training Tool for Eye Muscle S..." brand: "brock string" price: "296 kr" currency: DKK in_stock: null reviews_count: 5 category: "Brock String" url: https://www.desertcart.dk/products/50773397-brock-string-vision-convergence-insufficiency-training-tool-for-eye-muscle store_origin: DK region: Denmark --- # Enhances sports vision focus Boosts eye muscle strength 6-foot precision length Brock String, Vision Convergence Insufficiency Training Tool for Eye Muscle S... **Brand:** brock string **Price:** 296 kr **Availability:** ❌ Out of Stock ## Summary > 👁️‍🗨️ See the difference, own the 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?** 296 kr with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.dk](https://www.desertcart.dk/products/50773397-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:** High-quality, durable materials designed for long-term use - • **Train Like a Pro:** 6-foot string with tight-fitted beads for sport-specific eye training - • **Effortless Mastery:** Simple to use at home with a minimal learning curve - • **Compact & Lightweight:** Only 0.02 kg, easy to carry and integrate into daily routines - • **Sharper Focus, Better Performance:** Improves convergence insufficiency and athletic edge ## Overview The Brock String is a 6-foot durable vision training tool designed to improve eye convergence, strengthen ocular muscles, and enhance athletic performance. Lightweight and easy to use at home, it features high-quality beads and string for precise, sport-specific vision training favored by professionals and fitness enthusiasts alike. ## Description Shop Brock String - Vision Convergence Training Tool - Train Vision, Improve Strength & Athletic Performance, and More!. Free delivery and returns on all eligible orders. Review: Received in a good condition Review: Good quality, easy to use ## 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 tight-fitted Brock beads, this 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. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0190LOMCQ | | Best Sellers Rank | 74,990 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) 36 in Bowstrings | | Brand | Brock String | | Brand Name | Brock String | | Colour | White | | Customer Reviews | 4.5 out of 5 stars 1,072 Reviews | | Grip Material | Plastic | | Handle Material | Ethylene Vinyl Acetate (EVA) | | Handle material | Ethylene Vinyl Acetate (EVA) | | Item Length | 6 Feet | | Item Weight | 0.02 Kilograms | | Manufacturer | Brock String | | Material | Plastic Rubber Metal | | Other Special Features of the Product | Durable | | Recommended Uses For Product | Exercise and Fitness | | Recommended uses for product | Exercise and Fitness | | Special feature | Durable | | Target Audience | Adult | | Target audience | Adult | | UPC | 860007923074 722512440333 | | Unit Count | 1.0 Count | ## Product Details - **Brand:** Brock String - **Material:** Plastic Rubber Metal - **Recommended uses for product:** Exercise and Fitness - **Special feature:** Durable - **Target audience:** Adult ## Images ![Brock String, Vision Convergence Insufficiency Training Tool for Eye Muscle S... - Image 1](https://m.media-amazon.com/images/I/513qIyNgBPL.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* ### ⭐⭐⭐⭐⭐ Good quality, easy to use *by J***B on 2 December 2025* ### ⭐⭐⭐⭐⭐ 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.dk/products/50773397-brock-string-vision-convergence-insufficiency-training-tool-for-eye-muscle](https://www.desertcart.dk/products/50773397-brock-string-vision-convergence-insufficiency-training-tool-for-eye-muscle) --- *Product available on Desertcart Denmark* *Store origin: DK* *Last updated: 2026-04-24*