--- product_id: 318846637 title: "Brock String, Vision Convergence Insufficiency Training Tool for Eye Muscle Strengthening, Focus Exercise and Agility" brand: "brock string" price: "€ 39.83" currency: EUR in_stock: true reviews_count: 6 category: "Brock String" url: https://www.desertcart.de/products/318846637-brock-string-vision-convergence-insufficiency-training-tool-for-eye-muscle store_origin: DE region: Germany --- # 5 fixed beads per string for targeted focus Durable nylon/polypropylene for lasting training 3 x 6 ft precision strings Brock String, Vision Convergence Insufficiency Training Tool for Eye Muscle Strengthening, Focus Exercise and Agility **Brand:** brock string **Price:** € 39.83 **Availability:** βœ… In Stock ## Summary > πŸ‘οΈβ€πŸ—¨οΈ Sharpen your focus, strengthen your vision, and never miss a moment! ## 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?** € 39.83 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.de](https://www.desertcart.de/products/318846637-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 - β€’ **Pro-Grade Materials:** Crafted from durable nylon and polypropylene for reliable, long-term use - β€’ **Triple-String Setup:** Train both eyes with three 6-foot strings for versatile vision workouts - β€’ **Portable & Lightweight:** Weighing just 0.04 kg, easy to carry and practice anywhere, anytime - β€’ **Precision Bead Placement:** Five tightly fitted beads per string ensure consistent, accurate convergence training - β€’ **Therapist-Approved Quality:** Endorsed by occupational therapists for effective home vision therapy ## Overview The Brock String Vision Training Tool includes three 6-foot strings, each with five fixed beads, designed to improve eye muscle strength and convergence. Made from durable nylon and polypropylene, this lightweight, therapist-approved set is perfect for sports vision training, convergence insufficiency therapy, and focus exercises at home or on the go. ## Description You'll simply love just how easy these Brock Strings are to use! These Brock Strings are 6 feet long and come 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: Good - Good for practice. Quite handy Review: OT approved - Purchased for vision therapy at home. Our OT commented that this was a good quality product as the beads don’t slide down the string when using. ## Features - Three Brock Strings, Each 6 Feet in Length - Great for Convergence Insufficiency Training, Sports Vision Training and Front Sight Focus Training - Each String Has 5 Tightly Fitted Beads on a High Quality String - Instructions Included ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B075881G1K | | Brand | Brock String | | Brand Name | Brock String | | Color | Multicolor | | Customer Reviews | 4.6 out of 5 stars 170 Reviews | | Grip Material | Nylon or Polypropylene | | Handle Material | Nylon or Polypropylene | | Handle material | Nylon or Polypropylene | | Item Length | 72 Inches | | Item Weight | 0.04 Kilograms | | Manufacturer | Brock String | | Material | Nylon , Polypropylene (PP) | | Model Number | 5Q-N5NL-FZO4 | | Other Special Features of the Product | Convergence Training | | Part Number | 5Q-N5NL-FZO4 | | Recommended Uses For Product | Exercise and Fitness, Speed and Endurance | | Recommended uses for product | Exercise and Fitness, Speed and Endurance | | Special features | Convergence Training | | Target Audience | Adult | | Target audience | Adult | | UPC | 860007923098 722512369382 | | Unit Count | 3.0 Count | ## Product Details - **Brand:** Brock String - **Material:** Nylon, Polypropylene (PP) - **Recommended uses for product:** Exercise and Fitness, Speed and Endurance - **Special features:** Convergence Training - **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/51i-qwxd9HL.jpg) ## Available Options This product comes in different **Size, Style** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Good *by M***. on 27 May 2025* Good for practice. Quite handy ### ⭐⭐⭐⭐⭐ OT approved *by J***Y on 31 March 2025* Purchased for vision therapy at home. Our OT commented that this was a good quality product as the beads don’t slide down the string when using. ### ⭐⭐⭐⭐⭐ Brock string rec by dr *by M***O on 7 February 2025* Def recommend I love that my son can pick which color to use and it does exactly what is intended for. Well worth the price ## Frequently Bought Together - Brock String Front Sight Focus String Combo Pack, Three 6-Foot, Vision Convergence Training Tool, Great for Shooters, Front Sight Training and More! - SADIKALO 6Pcs Eye Exercise Chart - Visual Muscle Relaxation Office Classroom Wall Decor Myopia Dry Eye Office Gifts Waterproof Posters Card Desk Sign for Home School Kids Students Office Coworkers - Brock String - Vision Convergence Training - Convergence Insufficiency Tool - Train Vision, Athletic Performance, and More!, White, 6 foot --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.de/products/318846637-brock-string-vision-convergence-insufficiency-training-tool-for-eye-muscle](https://www.desertcart.de/products/318846637-brock-string-vision-convergence-insufficiency-training-tool-for-eye-muscle) --- *Product available on Desertcart Germany* *Store origin: DE* *Last updated: 2026-07-08*