Because tears don't come from there. I can't remember if I forgot to put in the standard color line for the eyelid or decided not to because it'd look too weird with how her eyebrows had to look. Or they might be there and I had that layer turned off for some reason. Dunno, its been awhile.
I get it why you made Applejack a snake. She was the element of honesty, but now that she has been transformed, her element had been reversed. And now she's got a "snake tongue" which means a good liar! xD