Human tears are surprisingly complicated. They are full of lysozyme to break down proteins and pathogens but they have been shown to have other anti-microbial activities. To figure out where these are coming from Mikel Azkargorta et. al., performed an in-depth peptidomics analysis of some human tears. Their analysis looks something like this:
Turns out 2 of the things they found look like (in modeling experiments) antimicrobial compounds we didn't know about before!