When a character is afflicted with Blindness it can mean true Blindness from the loss of an eye, manipulation, deep darkness, poison, or simply being blindfolded properly. However it happens, characters will have DISADV on (or be unable to perform at the GM's discretion) many actions which require sight. A common example is attacking. All attacks made by the blinded character have DISADV and all enemy attacks made against them have ADV.
Blindness I: Significant eye irritation causes heavy tearing and discomfort for 1d6 rounds. An Earth saving throw against the Area DC may be made every round to negate the effects.
Blindness II: Temporary Blindness lasting for one hour where the character can only see vague shadows and and bright lights.
Blindness III: Permanent full blindness unless a Remedy is concocted to counteract the affliction. Potions such as these are extremely rare and details vary with each.
Blindness I: Earth 3
Blindness II: Earth 5
Blindness III: Earth 7