Protein secretions known as MUC5AC coming from the upper eyelid cells partly compose the mucus layer that normally occur to maintain eye moisture. This mucus is also referred to as “tear film” by medical practitioners. Findings revealed that the participants who had the most time in front of screens possess MUC5AC levels which are near those of patients with dry eye. Want to preserve healthy eyes? Watch the video. Original Source: Staring At Screens All Day Changes Your Eyes, Study Finds by Kathryn Doyle via Huffington Post Featured photo credit: Staring At Screens All Day Changes Your Eyes, Study Finds/Huffington Post via huffingtonpost.com