Hey /an/ I just picked up this one year old cat from the pound and she has this in the corner of her left eye, what gives? They gave me some antibiotics and told me it should clear up and it to a common cold to a human.
We had a cat that had an infected tearduct. Mucus and other nasty shit would build up in the corner of his eye. Only way they told us it could be fixed was to basically drill a new duct.
Anyway, that's what it sort of looks like, is a problem with her tearduct.