{"id":10785,"date":"2012-01-19T09:49:00","date_gmt":"2012-01-19T17:49:00","guid":{"rendered":"https:\/\/dornsife.usc.edu\/news\/stories\/usc-scientists-keep-their-eyes-on-peripheral-vision\/"},"modified":"2023-04-19T11:20:23","modified_gmt":"2023-04-19T18:20:23","slug":"usc-scientists-keep-their-eyes-on-peripheral-vision","status":"publish","type":"post","link":"https:\/\/dornsife.usc.edu\/news\/stories\/usc-scientists-keep-their-eyes-on-peripheral-vision\/","title":{"rendered":"USC Scientists Keep Their Eyes on Peripheral Vision"},"content":{"rendered":"\n\n\n    \n            \n\n  \n    \n\n\n\n\n\n\n<div\n  class=\"cc--component-container cc--article-hero \"\n\n  \n  \n  \n  \n  \n  \n  >\n  <div class=\"c--component c--article-hero\"\n    \n      >\n\n    \n<div class=\"inner-wrapper\">\n  \n  \n  <div class=\"text-wrapper\">\n          <nav aria-label=\"Breadcrumb\" class=\"breadcrumbs\">\n        <ul>\n                      <li><a href=\"\/news\/stories\/\">News<\/a><\/li>\n                      <li><a href=\"\/news\/stories\/\/?category=faculty\">Faculty<\/a><\/li>\n                  <\/ul>\n      <\/nav>\n    \n              \n<div class=\"f--field f--page-title\">\n\n    \n  <h1>USC Scientists Keep Their Eyes on Peripheral Vision<\/h1>\n\n\n<\/div>\n    \n    \n           <strong class=\"author-field\"><span >By<\/span><a href=\"mailto:communication@dornsife.usc.edu\">Robert Perkins<\/a><\/strong>\n    \n          <span class=\"post-date-field\">January 19, 2012<\/span>\n      <\/div>\n<\/div>\n\n\n  <\/div><\/div>\n\n  \n    \n\n\n\n\n\n\n<div\n  class=\"cc--component-container cc--social-share \"\n\n  \n  \n  \n  \n  \n  \n  >\n  <div class=\"c--component c--social-share\"\n    \n      >\n\n    \n  <div class=\"content-wrapper\">\n    <span class=\"a2a_kit a2a_kit_size_32 addtoany_list\" style=\"line-height: 32px;\">\n      <span class=\"title\">\n        Share\n      <\/span>\n                        <a class=\"a2a_button_copy_link\" target=\"_blank\" 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visually-hidden\">Email<\/span>\n          <\/a>\n                  <\/span>\n  <\/div>\n\n  <\/div><\/div>\n  \n\n  \n    \n\n\n\n\n\n\n<div\n  class=\"cc--component-container cc--rich-text \"\n\n  \n  \n  \n  \n  \n  \n  >\n  <div class=\"c--component c--rich-text\"\n    \n      >\n\n    \n      \n<div class=\"f--field f--wysiwyg\">\n\n    \n  <p>Two USC scientists are bringing peripheral vision into focus, showing  that the way the brain sharpens its attention while the eyes are in  motion leads to false assumptions about how objects should look.<\/p>\n<p>The eye&rsquo;s photoreceptors&nbsp;&mdash; the cells that detect light &mdash; are  clustered at the center of the field of vision, leaving the periphery  like a low-resolution camera. USC Dornsife neuroscientist Bosco S. Tjan and USC  graduate student Anirvan S. Nandy theorized that peripheral vision  is hindered by the visual experience formed in the brain during eye  movements.<\/p>\n<p>Their paper was published online on Jan. 8 in<em> Nature Neuroscience<\/em>.<\/p>\n<p>According to the researchers, a single neural signal directs the eyes  to look at an object of interest in the periphery and causes the brain  to start paying attention to that object. Unless they are tracking an  object &mdash; such as a police officer&rsquo;s penlight during a sobriety test &mdash;  human eyes do not tend to move in fluid motions. Instead, they jump from  one point of focus to another in a jerky fashion called &ldquo;saccadic&rdquo; eye  movement.<\/p>\n<p>Those movements bring an object into the center of the field of  vision. The brain actually starts paying attention to that object &mdash;  &ldquo;turning on&rdquo; its ability to learn about it &mdash; shortly before the eyes  move and lock on to it.<\/p>\n<p>The researchers said this makes the version of the visual world that the brain learns from the periphery appear smeared.<\/p>\n<p>&ldquo;Parts of the brain that process peripheral vision assume these  smears were typical of the physical world and make corresponding  perceptual errors that cannot be explained by merely seeing the world in  low resolution,&rdquo; said Tjan, associate professor of psychology.<\/p>\n<p>Vision is based, in part, on assumptions made by the brain. For  example, if you look at a coffee mug, your brain sees one side of it and  assumes that the rest is completely round &mdash; when in fact the back side  that you do not see could be almost any shape at all, to a certain  point.<\/p>\n<p>&ldquo;For the brain to see things, generally speaking, it has to make assumptions about the world,&rdquo; Tjan said.<\/p>\n<p>(Mis)guided by the peripheral vision&rsquo;s smeared version of the world,  the brain would have a hard time recognizing objects in the periphery  and be more prone to error. Tjan and Nandy&rsquo;s theory explained a wealth  of empirical data on peripheral vision gathered in the last few decades.<\/p>\n<p>Tjan said he hopes their work will help inform therapy for patients  suffering from diseases like macular degeneration, in which damage to  the retina costs patients sight at the center of the field of vision.<\/p>\n<p>Macular degeneration is, for the moment, irreversible. Patients with  macular degeneration are retaught how to see by focusing their attention  outside the center of their field of vision &mdash; a difficult task, given  the poor quality of the image with which they are left.<\/p>\n<p>&ldquo;At least for now, the best we can hope for is to train a patent to  use [his or her] periphery. But to do that, we need to know why the  periphery is so much worse,&rdquo; Tjan said.<\/p>\n<p>The research was supported by the National Eye Institute of the National Institutes of Health.<\/p>\n\n\n\n<\/div>\n\n\n  <\/div><\/div>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":0,"featured_media":10788,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[10],"tags":[975,255,112,95],"class_list":["post-10785","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-faculty","tag-bosco-tjan","tag-neurosciences","tag-psychology","tag-social-sciences"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>USC Scientists Keep Their Eyes on Peripheral Vision<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, 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