Why do we cry? The three types of tears (TED-Ed video)

Whether we cry during a sad movie, while chopping onions, or completely involuntarily, our eyes are constantly producing tears. Alex Gendler tracks a particularly watery day in the life of Iris (the iris) as she cycles through basal, reflex and emotional tears.Read more here: http://ed.ted.com/lessons/why-do-we-cry-the-three-types-of-tears-alex-gendler Posted at Clinical Cases and Images. Stay updated and subscribe, follow us on Twitter and connect on Facebook.
Source: Clinical Cases and Images - Category: Journals (General) Tags: Ophthalmology TED Talks Source Type: news