Brock String Train Vision, Athletic Performance, and More!

You’ll simply love just how easy this Brock String is to use! This Brock String is 6 feet long and comes 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.

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 5 tight-fitted beads, this Brock 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.

What People Say!

Heather Mason
Heather Mason
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My 9 year old daughter has tried everything to help with her lazy eye. Eye patches, eye exercises, everything! Her doctor recommended doing this for 5-10 minutes a day for 4 days a week for 5 months. In that 5 months my daughter's lazy eye is completely corrected itself, and her vision is 20/20! Such a simple tool that has made a HUGE difference!
John Q. Public
John Q. Public
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I read a lot of reviews that mentioned the beads being loose on the string, but I did not find that to be the case. The string is good quality and the beads fit well and stay in place, yet are easy to position. The item comes with directions and I received an email from the seller with a pdf of the same sheet, which I appreciated.
Nicole Marie
Nicole Marie
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I bought these for my daughter who was diagnosed with CI. Her optometrist recommended getting some for at home therapy. These work great. I saw a trick to help little ones- drill a hole in a popsicles stick (or tongue depressor) and feed the string through it. Then, your kiddo can hold the popsicle stick, with the end of the string attached, easier for your tracking practice.
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Frequently Asked Questions

Yes it comes with instructions both with the product and again digitally by email.
People used these for their daughter to help her eyes work together. It was suggested by her vision therapist. They played around with it also and they did get better at focusing.
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.
It does not come with a storage tin. This Brock String includes 5 beads on the string (which is superior to the standard 3 beaded string).
You can attach it to a wall using a tack or tape. We recommend starting with the string at eye-level height.
Package Dimensions ‏ : ‎ 5.24 x 4.41 x 0.59 inches; 0.63 Ounces