There is a real issue with teemo's blind not affecting things for the full duration.

When playing against Yi or a Tryndamere, I've noticed lots of times that they still hit even when it clearly says blinded above them. I know the perfect timed alpha strike will negate the blind entirely. I'm talking about after he uses it, blinding him, still says he's blinded above his head, and he still auto attacks a kill. Also tell me why a perfectly timed alpha strike will negate blind but a perfectly executed invis by teemo doesn't stop yi from alpha striking to him. Teemo still goes invis, but yi is brought to him and damage is done to teemo. This isn't right. I have played well over enough games with teemo to see it time and time again. The only real champs I see the blind glitching on is Tryndamere and Yi. Also if teemo blinds the gromp, he only misses one auto attack. It doesn't matter what level you blind is, you could have it maxed, and watch the gromp does not stay blinded as he should. Please look into these issues and fix.