{"id":8728,"date":"2020-10-27T12:58:24","date_gmt":"2020-10-27T12:58:24","guid":{"rendered":"https:\/\/www.optometrists.org\/?page_id=8728"},"modified":"2021-08-01T08:58:51","modified_gmt":"2021-08-01T08:58:51","slug":"what-is-an-eye-stroke","status":"publish","type":"page","link":"https:\/\/www.optometrists.org\/general-practice-optometry\/guide-to-eye-conditions\/guide-to-blurry-vision-and-headaches\/when-is-blurred-vision-a-medical-emergency\/what-is-an-eye-stroke\/","title":{"rendered":"What Is an Eye Stroke?"},"content":{"rendered":"<h2><b>A retinal blood vessel occlusion,<\/b> <b>commonly referred to as an \u2018eye stroke\u2019 occurs when the blood vessels in the eye become narrowed or blocked.<\/b><\/h2>\n<p>The blood vessels in the body are responsible for carrying oxygen and nutrients to each and every body part. When the blood supply is cut off and can no longer reach a specific body part, a stroke can occur\u2014 leading to significant damage to that body part.<\/p>\n<p><b>When a stroke occurs in the eye, the <a href=\"https:\/\/www.optometrists.org\/general-practice-optometry\/eye-anatomy-the-back-of-the-eye\/\">retina<\/a> is primarily affected.\u00a0<\/b><\/p>\n<p>The retina is the light-sensitive tissue in the back of the eye that transfers visual information to your brain for interpretation and processing. This enables you to see images clearly.<\/p>\n<h2><b>How does an eye stroke affect vision?<\/b><\/h2>\n<p>The blood vessels in the eye that enter the retina via the optic nerve are called the \u2018central\u2019 blood vessels. As these blood vessels branch out into smaller blood vessels, they are referred to as \u2018branch\u2019 blood vessels.<\/p>\n<p>When the central or branch blood vessels in your retina become blocked, fluid can leak into the retina and cause swelling. This retinal inflammation is what ultimately impacts your ability to see.<\/p>\n<p>There are different types of eye strokes:<\/p>\n<ul>\n<li style=\"list-style-type: none;\">\n<ul>\n<li style=\"font-weight: 400;\"><b>Central retinal artery occlusion (CRAO)<\/b> occurs when the blockage is located in the retina\u2019s central artery.<\/li>\n<li style=\"font-weight: 400;\"><b>Branch retinal artery occlusion (BRAO)<\/b> occurs when the blockage is located within the retina\u2019s smaller branch arteries.<\/li>\n<li style=\"font-weight: 400;\"><b>Central retinal vein occlusion (CRVO)<\/b> occurs when the blockage is located in the main central retinal vein.<\/li>\n<li style=\"font-weight: 400;\"><b>Branch retinal vein occlusion (BRVO) <\/b>occurs when the blockage is located within one of the smaller retinal branch veins.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<ul><\/ul>\n<h2><b>Am I having an eye stroke?<\/b><\/h2>\n<p>Eye stroke symptoms can come on suddenly, or develop gradually over the course of a few hours or even days.<\/p>\n<p>Prompt treatment is essential in order to prevent permanent vision loss.<\/p>\n<p><b>Symptoms<\/b>:<\/p>\n<ul>\n<li style=\"font-weight: 400;\">Grey spots or floaters in your visual field<\/li>\n<li style=\"font-weight: 400;\">Eye pressure<\/li>\n<li style=\"font-weight: 400;\">Blurry vision that gets progressively worse<\/li>\n<li style=\"font-weight: 400;\">Gradual or sudden total vision loss<\/li>\n<\/ul>\n<p><b>The distinguishing symptom of an eye stroke is that it typically occurs in only one eye.\u00a0<\/b><\/p>\n<h2><b>Risk factors<\/b><\/h2>\n<p>While it isn\u2019t always possible to determine the cause of an eye stroke, researchers believe that certain factors and health conditions can increase your risk.<\/p>\n<ul>\n<li>Older age: Above age 60<\/li>\n<li>Gender: Male<\/li>\n<li>Smoking<\/li>\n<li>Diabetes<\/li>\n<li><a href=\"https:\/\/www.optometrists.org\/general-practice-optometry\/eye-conditions\/glaucoma-guide\/glaucoma\/\">Glaucoma<\/a><\/li>\n<li>High blood pressure<\/li>\n<li>High cholesterol<\/li>\n<li>Cardiovascular disease<\/li>\n<li>Narrowing of the artery in the neck (carotid artery)<\/li>\n<li>Blood disorders<\/li>\n<\/ul>\n<p><b>If you are experiencing symptoms of an eye stroke, <a href=\"https:\/\/www.optometrists.org\/practice-search\/\">contact an eye doctor immediately<\/a>, even if your symptoms seem to be improving.\u00a0\u00a0<\/b><\/p>\n<p><strong>SEE RELATED:<\/strong> <a href=\"https:\/\/www.optometrists.org\/general-practice-optometry\/eye-conditions\/guide-to-blurry-vision-and-headaches\/when-is-blurred-vision-a-medical-emergency\/anterior-uveitis\/\">Anterior Uveitis<\/a><\/p>\n\n\t<div class=\"practice-search-widget\">\n\t\t<h3>Find an 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 is an eye stroke diagnosed?<\/b><\/h2>\n<p>An eye stroke is diagnosed during an <a href=\"https:\/\/www.optometrists.org\/general-practice-optometry\/comprehensive-eye-exams\/\">eye exam<\/a>. Your eye doctor will use specialized tools and imaging devices to obtain a clear view of your inner eye and identify signs of retinal fluid or damage.<\/p>\n<ul>\n<li style=\"font-weight: 400;\"><b><a href=\"https:\/\/www.optometrists.org\/general-practice-optometry\/guide-to-eye-exams\/eye-exams\/what-is-an-oct-eye-exam\/\">Optical coherence tomography<\/a> (OCT)<\/b> is a digital imaging test that can help your doctor detect the presence of retinal swelling.<\/li>\n<li style=\"font-weight: 400;\"><b>Fluorescein angiography<\/b> is used to highlight any blood vessel damage in your retina. During this test, a small amount of yellow dye (fluorescein) is injected into a vein in your arm. The dye travels through your bloodstream to your eyes. A camera then captures images of the retinal arteries as they are highlighted, to facilitate the identification of blocked arteries.<\/li>\n<li style=\"font-weight: 400;\"><b><a href=\"https:\/\/www.optometrists.org\/general-practice-optometry\/guide-to-eye-exams\/why-is-eye-pressure-important\/\">Tonometry<\/a> <\/b>is a test that measures the pressure within your eyes to detect the presence of glaucoma\u2014 which can cause an eye stroke.<\/li>\n<li style=\"font-weight: 400;\"><a href=\"https:\/\/www.optometrists.org\/general-practice-optometry\/guide-to-eye-exams\/eye-exams\/what-is-a-visual-acuity-test\/\"><b>Visual acuity<\/b> <b>tests <\/b><\/a>facilitate the identification of a refractive error and measure how well you are able to see, and if your vision has been affected.<\/li>\n<\/ul>\n<h2><b>How is an eye stroke treated?<\/b><\/h2>\n<p><b>Eye stroke treatments must be given within a few hours following the onset of symptoms in order to effectively protect your vision and prevent vision loss.\u00a0<\/b><\/p>\n<p>The most common treatments include:<\/p>\n<ul>\n<li style=\"font-weight: 400;\">Inhalation of a carbon dioxide-oxygen mixture to widen the arteries of the retina<\/li>\n<li style=\"font-weight: 400;\">Removal of ocular liquid to help the clot pass<\/li>\n<li style=\"font-weight: 400;\">Medication to break up the clot<\/li>\n<li style=\"font-weight: 400;\"><a href=\"https:\/\/www.optometrists.org\/general-practice-optometry\/eye-conditions\/guide-to-diabetes-and-the-eyes\/how-is-diabetic-retinopathy-treated\/how-do-anti-vegf-injections-work\/\">Anti-VEGF injections<\/a><\/li>\n<li style=\"font-weight: 400;\">Corticosteroid injections<\/li>\n<li style=\"font-weight: 400;\">Eye massage to help open the retinal arteries and veins<\/li>\n<li style=\"font-weight: 400;\">Laser treatment<\/li>\n<li style=\"font-weight: 400;\">Pan-retinal photocoagulation therapy<\/li>\n<\/ul>\n<h2><b>Complications from an eye stroke<\/b><\/h2>\n<p><b>Although some vision may be recovered following an eye stroke, most people experience some degree of vision loss.\u00a0<\/b><\/p>\n<p>In addition, other serious complications can arise, such as:<\/p>\n<ul>\n<li style=\"font-weight: 400;\"><a href=\"https:\/\/www.optometrists.org\/general-practice-optometry\/eye-conditions\/guide-to-diabetes-and-the-eyes\/diabetic-macular-edema\/\">Macular edema<\/a><\/li>\n<li style=\"font-weight: 400;\">Neovascularization<\/li>\n<li style=\"font-weight: 400;\">Neovascular glaucoma<\/li>\n<li style=\"font-weight: 400;\">Blindness<\/li>\n<\/ul>\n<h2><b>Can I prevent an eye stroke?\u00a0<\/b><\/h2>\n<p>While an eye stroke cannot always be prevented, you can lower your risk by making certain lifestyle choices:<\/p>\n<ul>\n<li style=\"font-weight: 400;\">Control diabetes and glucose levels<\/li>\n<li style=\"font-weight: 400;\">Treat glaucoma and maintain a normal eye pressure<\/li>\n<li style=\"font-weight: 400;\">Maintain a healthy blood pressure<\/li>\n<li style=\"font-weight: 400;\">Consume a healthy diet to keep your cholesterol levels within the optimal range<\/li>\n<li style=\"font-weight: 400;\">Quit smoking<\/li>\n<\/ul>\n<p><strong>LEARN MORE:\u00a0<\/strong>\u00a0<a href=\"https:\/\/www.optometrists.org\/general-practice-optometry\/eye-conditions\/\">Guide to Eye Conditions<\/a><\/p>\n<p>If you or a loved one is experiencing symptoms of an eye stroke, vision loss, or any visual changes, <a href=\"https:\/\/www.optometrists.org\/practice-search\/\"><strong>contact an eye doctor immediately<\/strong><\/a> for a proper diagnosis.<\/p>\n<p><i>Early treatment is essential to protect your vision and prevent any complicati<\/i><i>ons from an eye stroke.\u00a0<\/i><\/p>\n","protected":false},"excerpt":{"rendered":"<p>A retinal blood vessel occlusion, commonly referred to as an \u2018eye stroke\u2019 occurs when the blood vessels in the eye become narrowed or blocked. The<\/p>\n","protected":false},"author":4,"featured_media":8729,"parent":11598,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"template-article.php","meta":{"footnotes":""},"categories":[],"tags":[84,216,417,241,136],"class_list":["post-8728","page","type-page","status-publish","has-post-thumbnail","hentry","tag-adults","tag-disease","tag-eye-stroke","tag-glaucoma","tag-vision-problem"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v23.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>What Is an Eye Stroke? - Optometrists.org<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.optometrists.org\/general-practice-optometry\/guide-to-eye-conditions\/guide-to-blurry-vision-and-headaches\/when-is-blurred-vision-a-medical-emergency\/what-is-an-eye-stroke\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"What Is an Eye Stroke? - Optometrists.org\" \/>\n<meta property=\"og:description\" content=\"A retinal blood vessel occlusion, commonly referred to as an \u2018eye stroke\u2019 occurs when the blood vessels in the eye become narrowed or blocked. 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