You know how to fight in melee without being able to see your foes.
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 (see Concealment).
An invisible attacker gets no advantages related to hitting you in melee. That is, you don’t lose your Dexterity bonus to Armor Class, and the attacker doesn’t get the usual +2 bonus for being invisible (see the Attack Roll Modifiers table and the Armor Class Modifiers table). The invisible attacker’s bonuses do still apply for ranged attacks, however.
You take only half the usual penalty to speed for being unable to see. Darkness and poor visibility in general reduces your speed to three-quarters normal, instead of one-half (see Hampered Movement).
Normal: Regular attack roll modifiers for invisible attackers trying to hit you (see the Attack Roll Modifiers table apply, and you lose your Dexterity bonus to AC. The speed reduction for darkness and poor visibility (see Hampered Movement) also applies.
Special: The Blind-Fight feat is of no use against a character who is the subject of a blink spell.
A fighter may select Blind-Fight as one of his fighter bonus feats.
Source: Player’s Handbook (version 3.5), page 89.