If you're wearing contacts, you might want to take a look at this. We're conducting a survey of our viewers! If you have time, please give us feedback: www.surveymonkey.com/r/SciShowSurvey2017 Hosted by: ---------- Support SciShow by becoming a patron on Patreon: www.patreon.com/scishow ---------- Dooblydoo thanks go to the following Patreon supporters: Kevin Bealer, Mark Terrio-Cameron, KatieMarie Magnone, Inerri, D.A. Noe, Charles Southerland, Fatima Iqbal, سلطان الخليفي, Nicholas Smith, Tim Curwick, Scott Satovsky Jr, Philippe von Bergen, Bella Nash, Chris Peters, Patrick D. Ashmore, Piya Shedden, Charles George ---------- Looking for SciShow elsewhere on the internet? Facebook: www.facebook.com/scishow Twitter: www.twitter.com/scishow Tumblr: scishow.tumblr.com Instagram: instagram.com/thescishow ---------- Sources: www.mirror.co.uk/news/uk-news/student-who-ripped-cornea-after-9161849 jezebel.com/student-keeps-contacts-in-for-six-months-amoeba-eats-1604319154 www.med.umich.edu/1libr/Ophthalmology/ContactLens/SignsofInfectionfromContactLenses.pdf www.allaboutvision.com/contacts/faq/cls-damage-eyes.htm www.allaboutvision.com/contacts/extended.htm www.ccmr.cornell.edu/faqs/why-are-eyeballs-wet/ www.masseyeandear.org/for-patients/patient-guide/patient-education/diseases-and-conditions/cornea/function www.d.umn.edu/~jfitzake/Lectures/DMED/Vision/Optics/Crying.html www.aao.org/eyenet/article/confronting-corneal-ulcers?july-2012 u.osu.edu/buckmdblog/2013/02/19/how-long-can-i-leave-my-contact-lenses-in/ www.aaojournal.org/article/S0161-6420(99)00027-5/fulltext www.ncbi.nlm.nih.gov/pubmed/12394550 www.ncbi.nlm.nih.gov/pubmed/3863808 www.ncbi.nlm.nih.gov/books/NBK234044/

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