{"version":"1.0","provider_name":"Revista Brasileira de Oftalmologia","provider_url":"https:\/\/www.rbojournal.org\/en\/","title":"Levels of Evidence: What Should Ophthalmologists Know? - Revista Brasileira de Oftalmologia","type":"rich","width":600,"height":338,"html":"<blockquote class=\"wp-embedded-content\" data-secret=\"oOsoZdloJE\"><a href=\"https:\/\/www.rbojournal.org\/en\/article\/levels-of-evidence-what-should-ophthalmologists-know\/\">Levels of Evidence: What Should Ophthalmologists Know?<\/a><\/blockquote><iframe sandbox=\"allow-scripts\" security=\"restricted\" src=\"https:\/\/www.rbojournal.org\/en\/article\/levels-of-evidence-what-should-ophthalmologists-know\/embed\/#?secret=oOsoZdloJE\" width=\"600\" height=\"338\" title=\"&#8220;Levels of Evidence: What Should Ophthalmologists Know?&#8221; &#8212; Revista Brasileira de Oftalmologia\" data-secret=\"oOsoZdloJE\" 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.rbojournal.org\/wp-includes\/js\/wp-embed.min.js\n\/* ]]> *\/\n<\/script>\n","description":"Facing an enormous influx of information from medical research, clinicians need to differentiate robust study findings from spurious ones. The levels of evidence are an important component of Evidence-Based Medicine. Understanding the levels helps the Ophthalmologist to prioritize information and make right clinical decisions. The aim of this article is to describe the hierarchy of studies regarding their scientific evidence focusing on ophthalmology."}