I read somewhere, maybe on here, that if you feel any emotion strong enough it'll make you cry because your body is trying to push out the excess hormones or something and that's why the chemical makeup of each emotions tears is different
Ehh... ths article kinda lost me at "psychic" tears.
There's no mention of the methodology, the collection, contamination controls, drying or even the means of photography.
An interesting idea, not much more that an exploratory study at best. It must be replicated for it to be science.
These pictures are real representatives of different emotions producing different tears. It's true with all continuous body fluids (e.g. sweat and saliva), hormones change them. Smell someone who's actively working out and someone who's been sitting in a hot room, both are sweaty but smell different and the dried residue of their sweat will also be different. You can buy a fertility like test for women that they just spit in, look at the dried saliva and depending on the way it looks when dry, the women can get an idea if she's ovulating.
http://www.smithsonianmag.com/science-nature/the-microscopic-structures-of-dried-human-tears-180947766/
There's no mention of the methodology, the collection, contamination controls, drying or even the means of photography.
An interesting idea, not much more that an exploratory study at best. It must be replicated for it to be science.
The smiling for overjoy is more emotional