You are skilled at attacking opponents that you cannot clearly perceive.
Prerequisites
Normal: Regular attack roll modifiers for invisible attackers trying to hit you apply, and you lose your Dexterity bonus to AC. The speed reduction for darkness and poor visibility also applies.
Special: The Blind-Fight feat is of no use against a character who is the subject of a blink spell.
Benefit
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.
An invisible attacker gets no advantages related to hitting you in melee. That is, you aren’t flat-footed against the attacks, and the attacker doesn’t get the usual +2 bonus for being invisible. The invisible attacker’s bonuses do still apply for ranged attacks, however.
You do not need to make Acrobatics skill checks to move at full speed while blinded or unable to see.