{"version":"1.0","provider_name":"Best Eye Hospitals","provider_url":"https:\/\/www.besteyehospitals.com\/blog","author_name":"dreye","author_url":"https:\/\/www.besteyehospitals.com\/blog\/author\/dreye\/","title":"optic nerve head: Definition, Uses, and Clinical Overview - Best Eye Hospitals","type":"rich","width":600,"height":338,"html":"<blockquote class=\"wp-embedded-content\" data-secret=\"kkim4QEsqa\"><a href=\"https:\/\/www.besteyehospitals.com\/blog\/optic-nerve-head-definition-uses-and-clinical-overview\/\">optic nerve head: Definition, Uses, and Clinical Overview<\/a><\/blockquote><iframe sandbox=\"allow-scripts\" security=\"restricted\" src=\"https:\/\/www.besteyehospitals.com\/blog\/optic-nerve-head-definition-uses-and-clinical-overview\/embed\/#?secret=kkim4QEsqa\" width=\"600\" height=\"338\" title=\"&#8220;optic nerve head: Definition, Uses, and Clinical Overview&#8221; &#8212; Best Eye Hospitals\" data-secret=\"kkim4QEsqa\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\" class=\"wp-embedded-content\"><\/iframe><script type=\"text\/javascript\">\n\/* <![CDATA[ *\/\n\/*! This file is auto-generated *\/\n!function(d,l){\"use strict\";l.querySelector&&d.addEventListener&&\"undefined\"!=typeof URL&&(d.wp=d.wp||{},d.wp.receiveEmbedMessage||(d.wp.receiveEmbedMessage=function(e){var t=e.data;if((t||t.secret||t.message||t.value)&&!\/[^a-zA-Z0-9]\/.test(t.secret)){for(var s,r,n,a=l.querySelectorAll('iframe[data-secret=\"'+t.secret+'\"]'),o=l.querySelectorAll('blockquote[data-secret=\"'+t.secret+'\"]'),c=new RegExp(\"^https?:$\",\"i\"),i=0;i<o.length;i++)o[i].style.display=\"none\";for(i=0;i<a.length;i++)s=a[i],e.source===s.contentWindow&&(s.removeAttribute(\"style\"),\"height\"===t.message?(1e3<(r=parseInt(t.value,10))?r=1e3:~~r<200&&(r=200),s.height=r):\"link\"===t.message&&(r=new URL(s.getAttribute(\"src\")),n=new URL(t.value),c.test(n.protocol))&&n.host===r.host&&l.activeElement===s&&(d.top.location.href=t.value))}},d.addEventListener(\"message\",d.wp.receiveEmbedMessage,!1),l.addEventListener(\"DOMContentLoaded\",function(){for(var e,t,s=l.querySelectorAll(\"iframe.wp-embedded-content\"),r=0;r<s.length;r++)(t=(e=s[r]).getAttribute(\"data-secret\"))||(t=Math.random().toString(36).substring(2,12),e.src+=\"#?secret=\"+t,e.setAttribute(\"data-secret\",t)),e.contentWindow.postMessage({message:\"ready\",secret:t},\"*\")},!1)))}(window,document);\n\/\/# sourceURL=https:\/\/www.besteyehospitals.com\/blog\/wp-includes\/js\/wp-embed.min.js\n\/* ]]> *\/\n<\/script>\n","description":"The optic nerve head is the visible \u201cfront end\u201d of the optic nerve inside the eye. It is the spot where retinal nerve fibers exit the eye to carry visual signals to the brain. Clinicians also call it the optic disc, and it is routinely assessed during eye exams and imaging. Its appearance can provide clues about glaucoma, optic nerve disease, and increased pressure around the brain."}