{"id":19854,"date":"2021-11-04T09:06:18","date_gmt":"2021-11-04T09:06:18","guid":{"rendered":"https:\/\/www.optometrists.org\/?page_id=19854"},"modified":"2022-01-05T11:32:01","modified_gmt":"2022-01-05T11:32:01","slug":"how-is-a-brock-string-used","status":"publish","type":"page","link":"https:\/\/www.optometrists.org\/vision-therapy\/guide-to-vision-therapy\/vision-therapy-faqs\/how-is-a-brock-string-used\/","title":{"rendered":"How Is a Brock String Used?"},"content":{"rendered":"<h2><b>The Brock string is a helpful tool when it comes to diagnosing and treating a variety of vision problems.\u00a0<\/b><\/h2>\n<p><em>A Brock string is used by some optometrists to help diagnose and treat some <a href=\"https:\/\/www.optometrists.org\/vision-therapy\/guide-vision-and-learning-difficulties\/the-17-key-visual-skills\/\">visual skills<\/a> issues.<\/em><\/p>\n<p>The Brock string is a white string around 10 to 15 feet long that contains several colored beads along the length of the string.<\/p>\n<p>The Brock string exercise is commonly used in vision therapy for vergence problems, such as <a href=\"https:\/\/www.optometrists.org\/vision-therapy\/vision-therapy-for-children\/convergence-insufficiency-2\/top-7-faqs-on-convergence-insufficiency\/\">convergence insufficiency,<\/a> <a href=\"https:\/\/www.optometrists.org\/vision-therapy\/vision-therapy-for-lazy-eye\/lazy-eye-faqs\/\">amblyopia (lazy eye)<\/a> and <a href=\"https:\/\/www.optometrists.org\/vision-therapy\/vision-therapy-for-lazy-eye\/lazy-eye-faqs\/\">strabismus (eye turn),<\/a> to improve double vision, blurred vision, headaches, visual discomfort, dizziness and imbalance.<\/p>\n<h2><b>How is the Brock string used in vision therapy?<\/b><\/h2>\n<p>The Brock string exercise is primarily used to improve convergence and suppression.<\/p>\n<p><b>Convergence<\/b> occurs when both eyes are focused on the same object or image at the same time. Convergence insufficiency makes it difficult to maintain focus on a near object or image and can lead to double vision and eye strain.<\/p>\n<p><b>Suppression<\/b> occurs when the brain decides to ignore the visual signals coming from one eye in order to avoid double vision. This can lead to a permanent lazy eye or strabismus, if not treated early on.<\/p>\n<p><b>The goal of the Brock string exercise is to improve binocular vision, eye teaming and eye coordination, at all distances.\u00a0<\/b><\/p>\n<p><strong><a href=\"https:\/\/www.optometrists.org\/practice-search\/\">Contact an eye doctor near you<\/a> to learn more about vision therapy.<\/strong><\/p>\n<p><strong>SEE RELATED: <\/strong><a href=\"https:\/\/www.optometrists.org\/vision-therapy\/guide-to-vision-therapy\/what-is-vision-therapy\/do-all-optometrists-provide-vision-therapy\/\">Do All Optometrists Provide Vision Therapy?<\/a><\/p>\n\n\t<div class=\"practice-search-widget\">\n\t\t<h3>Find a Vision Therapy Eye Doctor Near You<\/h3>\n\t\t\n\t<form class=\"practice-search-form practice-search-form-widget\" action=\"https:\/\/www.optometrists.org\/practice-search\/results\/\" method=\"get\">\n\n\t\t<input type=\"hidden\" name=\"distance\" value=\"100\" class=\"practice-search-distance\">\n\t\t<input type=\"hidden\" name=\"page\" class=\"practice-search-page\">\n\t\t<input type=\"hidden\" name=\"address_latitude\"><input type=\"hidden\" name=\"address_longitude\">\n\n\t\t<input type=\"text\" name=\"address\" class=\"practice-search-address\" placeholder=\"City, Surburb or Address\" value=\"\">\n\n\t\t\n\t\t\t<input type=\"hidden\" name=\"distance\" value=\"100\" class=\"practice-search-distance\">\n\n\t\t\n\n\t\t<button type=\"submit\" class=\"practice-search-button\">\n\t\t\t\t\t\t\t\t\t<svg width=\"19\" height=\"19\" viewBox=\"0 0 19 19\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path fill-rule=\"evenodd\" clip-rule=\"evenodd\" d=\"M10.6796 0.130005C9.15708 0.130059 7.66615 0.5646 6.38198 1.38258C5.09781 2.20057 4.07373 3.36803 3.43004 4.74783C2.78634 6.12763 2.54976 7.66246 2.74808 9.17205C2.9464 10.6816 3.57139 12.1033 4.54964 13.27L0.729639 17.08C0.6364 17.1732 0.562439 17.2839 0.511979 17.4058C0.461519 17.5276 0.435547 17.6581 0.435547 17.79C0.435547 17.9219 0.461519 18.0524 0.511979 18.1743C0.562439 18.2961 0.6364 18.4068 0.729639 18.5C0.917942 18.6883 1.17334 18.7941 1.43964 18.7941C1.5715 18.7941 1.70207 18.7681 1.82389 18.7177C1.94571 18.6672 2.0564 18.5932 2.14964 18.5L5.99964 14.62C7.35406 15.6038 8.98566 16.1324 10.6596 16.13C12.7814 16.13 14.8162 15.2871 16.3165 13.7869C17.8168 12.2866 18.6596 10.2517 18.6596 8.13C18.6596 6.00827 17.8168 3.97344 16.3165 2.47315C14.8162 0.97286 12.7814 0.130005 10.6596 0.130005H10.6796ZM10.6796 14.13C9.49295 14.13 8.33291 13.7781 7.34622 13.1188C6.35952 12.4595 5.59049 11.5225 5.13636 10.4261C4.68224 9.32975 4.56342 8.12335 4.79493 6.95946C5.02644 5.79558 5.59788 4.72648 6.437 3.88736C7.27611 3.04825 8.34521 2.4768 9.5091 2.24529C10.673 2.01378 11.8794 2.1326 12.9757 2.58673C14.0721 3.04085 15.0092 3.80989 15.6685 4.79658C16.3277 5.78328 16.6796 6.94332 16.6796 8.13C16.6796 9.7213 16.0475 11.2474 14.9223 12.3726C13.7971 13.4979 12.2709 14.13 10.6796 14.13Z\" fill=\"#fff\"\/><\/svg>\n\t\t\t\t\t<\/button>\n\n\t\t<button type=\"button\" class=\"practice-search-use-my-location\">\n\t\t\tSearch near me\n\t\t<\/button>\n\n\n\t<\/form>\n\n\n\n\t\t<\/div>\n\n\t\n<h2><b>How to perform a Brock string exercise?<\/b><\/h2>\n<ol>\n<li>Hold the Brock string with two hands, one at the beginning and the other at the end of the Brock string.<\/li>\n<li>Hold the one hand up to your nose and stretch the Brock string out by holding the other hand away from you.<\/li>\n<li>Look at the bead closest to you, it should appear singular, with two shorter strings leading up to it, and two longer strings leading away from it. The two strings should form an &#8220;X&#8221; as they enter and exit the bead. If this bead appears to be double, you may have a convergence problem.\u00a0 If that is the case, move the nearest bead farther away until it appears as a single bead. As the task grows easier, gradually move this bead closer and closer until it is one inch away from the bridge of your nose.<\/li>\n<li>Switch your focus from one bead to the next while maintaining awareness that the center of the X has now shifted and there are still two white strings.<\/li>\n<li>\u00a0All beads other than the one at the center of the X should appear doubled.<\/li>\n<li>Repeat this exercise as per your doctor\u2019s instructions, varying the placements of the fixation beads.<\/li>\n<\/ol>\n<p>As you practice, try to be aware of other objects around you and in your peripheral vision.<\/p>\n<p><strong><a href=\"https:\/\/www.optometrists.org\/practice-search\/\">Contact an eye doctor near you<\/a> to learn more about vision therapy.<\/strong><\/p>\n<p><strong>LEARN MORE:<\/strong> <a href=\"https:\/\/www.optometrists.org\/vision-therapy\/guide-to-vision-therapy\/\">Guide to Vision Therapy<\/a><\/p>\n<p><i>While the Brock string has numerous applications, it is not a do-it-yourself exercise; you will obtain the best results under the supervision of a vision therapy optometrist<\/i>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The Brock string is a helpful tool when it comes to diagnosing and treating a variety of vision problems.\u00a0 A Brock string is used by<\/p>\n","protected":false},"author":1206,"featured_media":19856,"parent":1438,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"template-article.php","meta":{"footnotes":""},"categories":[],"tags":[],"class_list":["post-19854","page","type-page","status-publish","has-post-thumbnail","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v23.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>How Is a Brock String Used? 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