--- title: Using the Brock String Test to Strengthen Your Eyes description: The Brock String Test is designed to test and treat visual perception problems. 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Using the Brock String Test to Strengthen Your Eyes # Using the Brock String Test to Strengthen Your Eyes ![Image of Cognitive FX Team](https://www.cognitivefxusa.com/hubfs/Rounded-C-R.jpg) Cognitive FX Team • Updated on 24 January, 2019 • Medically Reviewed by [Dr. Alina Fong](https://www.cognitivefxusa.com/blog/author/dr-alina-fong-phd) [mailto:?subject=Check%20out%20https://www.cognitivefxusa.com/blog/using-the-brock-string-test%20&body=Check%20out%20https://www.cognitivefxusa.com/blog/using-the-brock-string-test&media=https://info.cognitivefxusa.com/hubfs/Using%20the%20Brock%20String%20Test%20to%20Strengthen%20Your%20Eyes.png](mailto:?subject=Check%20out%20https://www.cognitivefxusa.com/blog/using-the-brock-string-test%20&body=Check%20out%20https://www.cognitivefxusa.com/blog/using-the-brock-string-test&media=https://info.cognitivefxusa.com/hubfs/Using%20the%20Brock%20String%20Test%20to%20Strengthen%20Your%20Eyes.png) ###  What is the Brock String Test?  The Brock String Test is designed to test and treat visual perception problems. This is important because these problems can contribute to headaches, blurry vision, balance problems, and more. Symptoms that can be caused by a concussion. The Brock String Test really looks at two different things: convergence and suppression. Convergence is when both eyes are looking forward and an object is moving closer and you have to almost cross your eyes. If you are not converging then one eye remains looking forward instead of meeting with the other eye. If this is one of your problems then you may be seeing double. Suppression is when your brain has decided to ignore the signals from one of your eyes that are bring transmitted up to the brain. In this case, you will just see one field of vision, and it may be influencing your balance and your peripheral vision. ### How Can I use the Brock String Test to Help my Eyes?  The Brock String Test is an exercise you can do a few minutes a day to help re-train your eyes and help them to work properly with both convergence and suppression. So this test not only helps you understand if your eyes are working properly but it is the exercise that can strengthen them and help them to both converge and work together again for better focus, and less suppression.   We use this with many of our patients during EPIC Treatment, and many times it is a take home exercise that we encourage our patients to continue [after treatment](https://www.cognitivefxusa.com/taking-awareness-with-you).  [![Support after EPIC Treatment](https://no-cache.hubspot.com/cta/default/2921058/7f85b140-b973-4491-a25c-3ebeb1588f74.png)](https://cta-redirect.hubspot.com/cta/redirect/2921058/7f85b140-b973-4491-a25c-3ebeb1588f74) --- ![Image of Cognitive FX Team](https://www.cognitivefxusa.com/hs-fs/hubfs/Rounded-C-R.jpg?height=150&name=Rounded-C-R.jpg) ### About the author [Cognitive FX Team](https://www.cognitivefxusa.com/blog/author/cognitive-fx-team) The "Cognitive FX Team" is a collaborative ensemble of distinguished doctors, therapists, and practitioners. Our experts are pioneers in the field of neuroimaging and concussion treatment. With extensive experience and a strong commitment to patient care, our team excels in utilizing cutting-edge technologies, such as functional MRI (fMRI), to provide personalized diagnostic and treatment strategies. Our renowned professionals have published groundbreaking research, developed innovative neuroimaging biomarkers, and conducted thousands of individualized patient assessments. We take pride in our holistic approach to patient care, focusing on physical, cognitive, and emotional aspects of recovery. As leaders in the industry, the Cognitive FX Team is dedicated to advancing the science of concussion diagnosis and treatment to provide our patients with the highest level of care and support. [Follow me on Facebook ](https://www.facebook.com/cognitivefx) ## Related Posts ![post-concussion-syndrome-sleep-what-to-do](https://www.cognitivefxusa.com/hs-fs/hubfs/post-concussion-syndrome-sleep-what-to-do.png?height=175&name=post-concussion-syndrome-sleep-what-to-do.png) ### Post Concussion Syndrome & Sleep: Why You’re Suffering and What to Do About It ![Image of Dr. Alina Fong, Ph.D.](https://www.cognitivefxusa.com/hs-fs/hubfs/Alina_150px.webp?height=70&name=Alina_150px.webp) [Dr. Alina Fong, Ph.D.](https://www.cognitivefxusa.com/blog/author/cognitive-fx-team) When you get a concussion, you may worry about when it’s safe to sleep. You might even have a friend or a family member wake you up every few hours. And while that is sometimes necessary (if you have... [Read the full article ](https://www.cognitivefxusa.com/blog/post-concussion-syndrome-sleep-what-to-do) ![Sleep Problems After a TBI: Causes & Treatment](https://www.cognitivefxusa.com/hs-fs/hubfs/tbi-sleep-problems-causes-and-treatment.jpg?height=175&name=tbi-sleep-problems-causes-and-treatment.jpg) ### Sleep Problems After a TBI: Causes & Treatment ![Image of Dr. Alina Fong, Ph.D.](https://www.cognitivefxusa.com/hs-fs/hubfs/Alina_150px.webp?height=70&name=Alina_150px.webp) [Dr. Alina Fong, Ph.D.](https://www.cognitivefxusa.com/blog/author/cognitive-fx-team) Sleep disturbances are a common yet often overlooked consequence of traumatic brain injuries (TBI). Many patients struggle with insomnia — having trouble falling asleep or waking up frequently during... [Read the full article ](https://www.cognitivefxusa.com/blog/tbi-sleep-problems-causes-and-treatment) ![](https://www.cognitivefxusa.com/hs-fs/hubfs/fMRI%20TIA.jpg?height=175&name=fMRI%20TIA.jpg) ### Cognitive Problems After TIA: Memory Loss, Brain Fog & Treatment Plans ![Image of Dr. Alina Fong, Ph.D.](https://www.cognitivefxusa.com/hs-fs/hubfs/Alina_150px.webp?height=70&name=Alina_150px.webp) [Dr. Alina Fong, Ph.D.](https://www.cognitivefxusa.com/blog/author/cognitive-fx-team) ## Introduction: When "Transient" Doesn't Mean Temporary If you're reading this, you or someone you love may have experienced what doctors call a "mini-stroke" or TIA (transient ischemic attack).... [Read the full article ](https://www.cognitivefxusa.com/blog/cognitive-problems-after-tia-memory-loss-brain-fog-treatment-plans) ![Yes, COVID Can Cause Long Term Problems. Here's What to Do.](https://www.cognitivefxusa.com/hs-fs/hubfs/covid-can-cause-long-term-problems.png?height=175&name=covid-can-cause-long-term-problems.png) ### Yes, COVID Can Cause Long-Term Problems. Here's What to Do. ![Image of Dr. Alina Fong, Ph.D.](https://www.cognitivefxusa.com/hs-fs/hubfs/Alina_150px.webp?height=70&name=Alina_150px.webp) [Dr. Alina Fong, Ph.D.](https://www.cognitivefxusa.com/blog/author/cognitive-fx-team) Long COVID is real. Data shared by the Centers for Disease Control and Prevention (CDC) from the[Household Pulse Survey](https://www.cdc.gov/nchs/covid19/pulse/long-covid.htm)(July/August 2022) show that more than 40% of adults in the United States have... [Read the full article ](https://www.cognitivefxusa.com/blog/covid-can-cause-long-term-problems) ![Computerized Concussion Testing-1](https://www.cognitivefxusa.com/hs-fs/hubfs/Computerized%20Concussion%20Testing-1.png?height=175&name=Computerized%20Concussion%20Testing-1.png) ### Computerized Concussion Testing ![Image of Cognitive FX Team](https://www.cognitivefxusa.com/hs-fs/hubfs/Rounded-C-R.jpg?height=70&name=Rounded-C-R.jpg) [Cognitive FX Team](https://www.cognitivefxusa.com/blog/author/cognitive-fx-team) ## Computerized Concussion Tests As concern about sports concussion has continued to rise over the last few years, there has been some hope that large-scale baseline testing, such as computerized... [Read the full article ](https://www.cognitivefxusa.com/blog/computerized-concussion-testing) ![What is NeuroVascular Coupling](https://www.cognitivefxusa.com/hs-fs/hubfs/What%20is%20NeuroVascular%20Coupling.png?height=175&name=What%20is%20NeuroVascular%20Coupling.png) ### What is NeuroVascular Coupling? ![Image of Cognitive FX Team](https://www.cognitivefxusa.com/hs-fs/hubfs/Rounded-C-R.jpg?height=70&name=Rounded-C-R.jpg) [Cognitive FX Team](https://www.cognitivefxusa.com/blog/author/cognitive-fx-team) Neuro refers to brain cells, also known as Neurons; Vascular means the blood supply or blood flow which is the same as the vascular system; and Coupling means connection. NeuroVascular Coupling (NVC)... [Read the full article ](https://www.cognitivefxusa.com/blog/what-is-neurovascular-coupling) #### Proven Results Improvement in 77% of Participants Published peer-reviewed research shows that Cognitive FX treatment leads to meaningful symptom reduction in post-concussion symptoms for 77% of study participants. Cognitive FX is the only PCS clinic with third-party validated treatment outcomes. 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