--- product_id: 254108556 title: "Brock String, Vision Convergence Insufficiency Training Tool for Eye Muscle Strengthening, Focus Exercise and Agility" brand: "brock string" price: "MX$919" currency: MXN in_stock: true reviews_count: 5 category: "Brock String" url: https://www.desertcart.mx/products/254108556-brock-string-vision-convergence-insufficiency-training-tool-for-eye-muscle store_origin: MX region: Mexico --- # 5 tightly fitted beads for precise focus points Durable high-quality string for consistent use 10-foot length for versatile training Brock String, Vision Convergence Insufficiency Training Tool for Eye Muscle Strengthening, Focus Exercise and Agility **Brand:** brock string **Price:** MX$919 **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?** MX$919 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.mx](https://www.desertcart.mx/products/254108556-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 string withstands daily training - • **Boost Your Game:** Perfect for sports vision and convergence insufficiency training - • **Precision Focus:** 5 tightly fitted beads create clear convergence targets - • **Train Like a Pro:** 10-foot length ideal for mid-distance eye muscle workouts - • **Complete Guidance:** Includes easy-to-follow instructions for effective use ## Overview The Brock String is a 10-foot vision training tool featuring 5 tightly fitted beads on a durable string, designed to improve eye muscle strength and focus. Ideal for sports vision and convergence insufficiency training, it comes with clear instructions to help you enhance visual agility and performance. ## Description This Brock String is 10 feet in length and is great for sports vision training, convergence insufficiency training, and more! Click 'Add to Cart' Now! Review: … - Bom Review: A good length of string. - Broc strings require patience and consistency of use. This one, unlike most on the market, is actually of a decent length, long enough for those of us training our eyes to see at mid-distance. One word of caution: don't be tempted to remove or rearrange the balls, as it is almost impossible to thread them back on the string. Good value. Give it a try! ## Features - 10 Foot Brock String - Convergence Insufficiency Trainer - Sports Vision Training - 5 Tightly Fitted Beads on High Quality String - Instructions Included ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B01MEFCDD1 | | Best Sellers Rank | #17,779 in Sporting Goods ( See Top 100 in Sporting Goods ) #24 in Racket Strings | | Brand | Brock String | | Brand Name | Brock String | | Color | White | | Customer Reviews | 4.4 out of 5 stars 728 Reviews | | Grip Material | Plastic | | Handle Material | Plastic | | Handle material | Plastic | | Item Length | 10 Feet | | Item Weight | 0.02 Kilograms | | Manufacturer | NeuroVision | | Material | Plastic | | Model Number | 7.22512E+11 | | Other Special Features of the Product | Perlenbesetzt | | Part Number | 7.22512E+11 | | Recommended Uses For Product | Exercise and Fitness | | Recommended uses for product | Exercise and Fitness | | Special features | Perlenbesetzt | | Target Audience | Adult | | Target audience | Adult | | UPC | 722512368781 860007923081 | | Unit Count | 1.0 Count | ## Product Details - **Brand:** Brock String - **Material:** Plastic - **Recommended uses for product:** Exercise and Fitness - **Special features:** Perlenbesetzt - **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/615dTbVdzbL.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/619gq0eFnDL.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/61BKsBy53-L.jpg) ## Available Options This product comes in different **Size, Style** options. ## Questions & Answers **Q: Will this improve bad case of myopia in adolescent?** A: This device improves depth perception, the ability of both eyes to focus at the same distance. Myopia is the inability to see beyond a given (near) distance. This may help improve myopia, but is not the intention. I use it to improve my focus n the front sight of my air rifle. **Q: Will this exercise help achieve fusion if the eyes are slightly turned inwards, rather than outwards?** A: If you believe the research, based on how it works, all eye muscles should be strengthened. I bough it to help me to hopefully correct my blurred Red Dot. It took about 8 weeks before I noticed a change. Good Luck. **Q: How long do you needto do this to get results?** A: I really don't know. I've been doing it for a few months--a regular, brief daily routine--along with remembering to be aware of seeing out of both eyes, rather than ignoring my lazy eye. Don't know how long it will take to get results -- but I think of the words of my meditation teacher when asked a similar question: "try it for a couple of years and see what you think . . ." Good luck and if it's not helping, check out the book, 'Fixing My Gaze'. There's some good information in there. **Q: Does this fix eye asymmetry?** A: Hi, This product is intended for convergence training where the eyes work together to perform convergence at each bead. ## Customer Reviews ### ⭐⭐⭐⭐⭐ … *by F***S on 6 June 2026* Bom ### ⭐⭐⭐⭐⭐ A good length of string. *by S***O on 1 September 2025* Broc strings require patience and consistency of use. This one, unlike most on the market, is actually of a decent length, long enough for those of us training our eyes to see at mid-distance. One word of caution: don't be tempted to remove or rearrange the balls, as it is almost impossible to thread them back on the string. Good value. Give it a try! ### ⭐⭐ Disappointing *by A***N on 9 May 2025* Instructions were not included as specified in the product details. Disappointing ## Frequently Bought Together - Brock String 10 Foot Vision Convergence Training Tool - Train Vision, Improve Strength & Athletic Performance, and More! - 2 Strabismus Correction Cards, Improve Visual Sense Amblyopia Coated Paper Training Cards with Red and Green Bars - 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.mx/products/254108556-brock-string-vision-convergence-insufficiency-training-tool-for-eye-muscle](https://www.desertcart.mx/products/254108556-brock-string-vision-convergence-insufficiency-training-tool-for-eye-muscle) --- *Product available on Desertcart Mexico* *Store origin: MX* *Last updated: 2026-08-10*