1.0Humanitas.nethttps://humanitas-net.humweb.webiz.team/pl/Emichahttps://humanitas-net.humweb.webiz.team/pl/author/emicha/rich600338<blockquote class="wp-embedded-content" data-secret="yQpxDQ8v6p"><a href="https://humanitas-net.humweb.webiz.team/pl/wiki/eye-fatigue-eyestrain-2/">Eye Fatigue (Eyestrain)</a></blockquote><iframe sandbox="allow-scripts" security="restricted" src="https://humanitas-net.humweb.webiz.team/pl/wiki/eye-fatigue-eyestrain-2/embed/#?secret=yQpxDQ8v6p" width="600" height="338" title="“Eye Fatigue (Eyestrain)” — Humanitas.net" data-secret="yQpxDQ8v6p" frameborder="0" marginwidth="0" marginheight="0" scrolling="no" class="wp-embedded-content"></iframe><script> /*! This file is auto-generated */ !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); //# sourceURL=https://humanitas-net.humweb.webiz.team/wp-includes/js/wp-embed.min.js </script> Eye fatigue or eyestrain is a condition that occurs when the muscle of the eyeball (internal and external muscles of the eye) gets tired from intense use. Each time an object is observed up close, in order to focus, activate both external and internal muscles of the eye by subjecting them to a real effort. […]