Player > Feats > Blind-Fight
You are skilled at attacking opponents you can’t clearly see.
In melee, every time you miss because of concealment, you can reroll your miss chance percentile roll one time to see if you actually hit.
You aren’t flat-footed against melee attacks from creatures you can’t see, and you can withdraw from creatures you can’t perceive. You don’t need to attempt Acrobatics checks to move at full speed while blinded.