Blind (3.5e Flaw)
From D&D Wiki
You are blind.
Prerequisite: Your race must have functional eyes.
Effect: You are permanently blinded. Because you have grown accustomed to this state, the associated penalties to AC and skill checks are halved. You can move at three-quarters speed.
Roleplaying Ideas: Was the character's sight lost for some reason after birth (possibly during game-play), or was the character born without it? Are the characters eyes actually missing, or are they still there stare out blankly?