--- product_id: 59495577 title: "Advanced Focus String – Vision Training Tool for Shooters | Dry Fire Accuracy Trainer with Front Sight Beads | Navy Seal Video Lessons Included" brand: "chris sajnog" price: "£17.17" currency: GBP in_stock: true url: https://www.desertcart.co.uk/products/59495577-advanced-focus-string-vision-training-tool-for-shooters-dry-fire store_origin: GB region: Great Britain --- # Advanced Focus String – Vision Training Tool for Shooters | Dry Fire Accuracy Trainer with Front Sight Beads | Navy Seal Video Lessons Included **Brand:** chris sajnog **Price:** £17.17 **Availability:** ✅ In Stock ## Quick Answers - **What is this?** Advanced Focus String – Vision Training Tool for Shooters | Dry Fire Accuracy Trainer with Front Sight Beads | Navy Seal Video Lessons Included by chris sajnog - **How much does it cost?** £17.17 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/59495577-advanced-focus-string-vision-training-tool-for-shooters-dry-fire) ## Best For - chris sajnog enthusiasts ## Why This Product - Trusted chris sajnog brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Description Aiming Sight Scope for Hunting ## Technical Specifications | Specification | Value | |---------------|-------| | Brand | Chris Sajnog | | Color | Black | | Sport | Hunting | | Item Weight | 0.07 Kilograms | | Compatible Devices | Handgun | | Mounting Type | Picatinny Mount | | Night vision | No | | Reticle Type | SOLID_BLACK | | UPC | 642554625089 | | Item Package Dimensions L x W x H | 6.46 x 4.09 x 0.67 inches | | Package Weight | 0.07 Kilograms | | Brand Name | Chris Sajnog | | Part Number | 4350070883 | ## Product Details - **Brand:** Chris Sajnog - **Color:** Black - **Sport:** Hunting - **Item Weight:** 0.07 Kilograms - **Compatible Devices:** Handgun - **Mounting Type:** Picatinny Mount - **Night vision:** No - **Reticle Type:** SOLID_BLACK - **UPC:** 642554625089 ## Images ![Advanced Focus String – Vision Training Tool for Shooters | Dry Fire Accuracy Trainer with Front Sight Beads | Navy Seal Video Lessons Included - Image 1](https://m.media-amazon.com/images/I/71mgbOQ9FoL.jpg) ## Questions & Answers **Q: Can someone please give me an overview on how this works? Thanks!** A: It is "Brock string eye exercise". The clinical use are exercises over a period of time to train the eye muscles to work together and exercise the muscles that focus the. I never seen a claim that helps aging eyes focus on close work, but It it seem to help me 35 years ago. My son was having reading problems in school and Brocks exercises were one of many things tried on him he didn't particularly care to do. I did them with him every night for a month. I don't think it helped his reading but sure heled my problems with eye strain form 18 hour day at a computer terminal. I have used a few times over the years for treating too much time at screen and i think it works for me. I'm 77 and can still see the sights with out glasses. **Q: how do i attach the string to my corneas?** A: Hi. The string does not attach to your face or any body parts. Checkout the instructions. I have found the focus string to be a good training tool. Good luck. https://s3-us-west-1.amazonaws.com/chrissajnogshares/Chris+Sajnog%E2%80%99s+Front+Sight+Focus+String+Directions.pdf **Q: Should I start with the regular focus string and move up to the advanced one or should I just start off with the advanced focus string?** A: Start off with one of each and one for each of your friends! Kidding. (kinda) They each have their advantages, but if you're using it for shooting I'd get the advanced one. If you want some variety down the road then get the regular one. If it's not for shooting, I'd go the other way around. **Q: I got a string, with beads on it and no instructions. What am i supposed to do with this please?.** A: Hi. Try this link to the pdf instructions. https://s3-us-west-1.amazonaws.com/chrissajnogshares/Chris+Sajnog’s+Front+Sight+Focus+String+Directions.pdf I use the focus string. I think it is an excellent training tool. Chris Sajnog’s training is right on. Good luck. ## Frequently Bought Together - Chris Sajnog Advanced Focus String - Firearms Vision Training Tool - Train Your Eyes at Home, to Shoot Faster with Both Eyes Open + Free Online Video Instructions with Navy Seal Sniper Instructor - Vibra-TITE 213 VC-3 Threadmate Threadlocker, -65 to 165 Degree F, 5mL Tube, Red - KNINE OUTDOORS Torque Screwdriver Wrench Driver Set 10-70 Inch Pounds lbs for Maintenance with T-bar Handle, 40 Hex Bits, 1/4" Socket, Shaft Extension, for Tools, Bike Repairing and Mounting, Orange --- ## 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.co.uk/products/59495577-advanced-focus-string-vision-training-tool-for-shooters-dry-fire](https://www.desertcart.co.uk/products/59495577-advanced-focus-string-vision-training-tool-for-shooters-dry-fire) --- *Product available on Desertcart Great Britain* *Store origin: GB* *Last updated: 2026-04-28*