--- product_id: 320863328 title: "Brock String, Vision Convergence Insufficiency Training Tool for Eye Muscle S..." brand: "brock string" price: "€ 42.41" currency: EUR in_stock: true reviews_count: 5 category: "Brock String" url: https://www.desertcart.fi/products/320863328-brock-string-vision-convergence-insufficiency-training-tool-for-eye-muscle store_origin: FI region: Finland --- # 3x 6-foot precision strings Durable nylon/polypropylene build Enhances eye muscle convergence Brock String, Vision Convergence Insufficiency Training Tool for Eye Muscle S... **Brand:** brock string **Price:** € 42.41 **Availability:** ✅ In Stock ## Summary > 👁️‍🗨️ Sharpen your sight, own your focus! ## Quick Answers - **What is this?** Brock String, Vision Convergence Insufficiency Training Tool for Eye Muscle S... by brock string - **How much does it cost?** € 42.41 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.fi](https://www.desertcart.fi/products/320863328-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 - • **Triple Pack Power:** Three 6-foot strings for extended, versatile training sessions - • **Sport-Specific Edge:** Optimized for shooters and athletes to enhance visual coordination and performance - • **Pro-Grade Durability:** Premium nylon/polypropylene materials ensure long-lasting, reliable use - • **Beginner Friendly Setup:** Easy-to-use with clear instructions, perfect for home vision therapy and advanced users alike - • **Precision Focus Training:** Strengthens eye muscles to boost visual convergence and sharpness ## Overview The Front Sight Focus String Combo Pack includes three durable 6-foot Brock Strings designed to improve eye muscle convergence and visual focus. Crafted from premium nylon and polypropylene, this tool supports vision training for shooters and athletes, offering easy setup and clear instructions for effective home use. ## Description Shop Brock String Front Sight Focus String Combo Pack, Three 6-Foot, Vision Convergence Training Tool, Great for Shooters, Front Sight Training and More!. Free delivery and returns on all eligible orders. Review: Cubre mis espectativas - Muy funcionales para tratamiento de estrabismo Review: Good ## 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 | B075881G1K | | Best Sellers Rank | 296,256 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) 65 in Archery Sights | | Brand | Brock String | | Brand Name | Brock String | | Colour | Multicolor | | Customer Reviews | 4.6 out of 5 stars 172 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) | | Other Special Features of the Product | Convergence Training | | Recommended Uses For Product | Vision Training, Eye Exercise | | Recommended uses for product | Vision Training, Eye Exercise | | Special feature | Convergence Training | | Target Audience | Adult | | Target audience | Adult | | UPC | 860007923098 722512369382 | ## Product Details - **Brand:** Brock String - **Material:** Nylon Polypropylene (PP) - **Recommended uses for product:** Vision Training, Eye Exercise - **Special feature:** Convergence Training - **Target audience:** Adult ## Images ![Brock String, Vision Convergence Insufficiency Training Tool for Eye Muscle S... - Image 1](https://m.media-amazon.com/images/I/51i-qwxd9HL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Cubre mis espectativas *by A***S on 4 April 2026* Muy funcionales para tratamiento de estrabismo ### ⭐⭐⭐⭐⭐ Good *by M***. on 27 May 2025* ### ⭐⭐⭐⭐⭐ OT approved *by J***Y on 31 March 2025* ## 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? - 🛒 **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.fi/products/320863328-brock-string-vision-convergence-insufficiency-training-tool-for-eye-muscle](https://www.desertcart.fi/products/320863328-brock-string-vision-convergence-insufficiency-training-tool-for-eye-muscle) --- *Product available on Desertcart Finland* *Store origin: FI* *Last updated: 2026-05-21*