[jmark]

You should get the sunglasses that are the most reflective. Then shine them up a bit. That way everyone can see your cards when you look at them.

Seriously, the only reason you should wear sunglasses is so you can stare at the cocktail waitresses without them knowing.

If you want to block tells you need to cover everything. I suggest buying a white sheet and cutting out the eyes or just get a ghost halloween costume. You also need one of those spy kid toys that makes your voice sound like a robot.