I have a Strganer THings sticker card 12 of 20 "Barbara Holland" that looks like the ones I've seen online except these have a set of googly eyes glued to the front over the character's eyes.

Is this something real or did who ever sent me the card think it was something funny?

I've bought a lot of Stranger Things over the past couple years and have not seen anything out of the ordinary. I think it is a prank...

I've received a few cards like that myself recently; I (think) I got them with a couple of Kickstarter rewards, but I'm not exactly sure which ones at the moment? Maybe the Drive-In Double Feature NOTLD/LMOE promo set?

The drive in set, yes. Ok must have just been for yucks..