Better idea for Teemo blind
Instead of outright blinding and making attacks miss, the screen fades to black for a couple seconds and you only see your powers, health and mana bars, and items. The map is dark, vision is dark, you can still attack you just can't see anything. Think of it as an improved nearsight. That way it doesn't shut any champ up and all champs, melee, marksman, and mage, are all effected by it.