Blind

 reduces your HIT and FLEE rate by 25% and also graphically reduces range of your visibility. It also goes by the term Dark.

Abilities
The following abilities inflict :
 * [Blind Attack] - An NPC-exclusive skill that inflicts by chance.
 * Vermilion on the Beach
 * Wall of Fog
 * Full Buster
 * Raid
 * Adoramus

Cure
can be cured through the following methods:
 * Green Potion, Panacea, Royal Jelly and Cure can undo the effect.
 * Jam Pancake, Honey Pancake, Mushroom Pancake, Caviar Pancake, and Sour Cream Pancake can remove the effect.
 * Having high VIT and LUK will reduce amount of time this ailment affects you, as well as chance of being affected.
 * INT also reduces the chance and duration.
 * Typing "/effect" will disable reduced visibility effect, but HIT and FLEE will still be reduced.
 * Battle Chant instantly removes all buffs and status effects from the Paladin who uses it, including Blind.
 * One of Battle Chant's random effects removes all abnormal status effects from party members, including Blind status.
 * One of Battle Chant's random effects grants 60 seconds of immunity to all status effects to party members, including Blind status.
 * Dispel removes this ailment.
 * Mercenary's skill Benediction can undo the effect.
 * Royal Guard's King's Grace can remove the effect.

Prevention
The following lists ways that can be prevented:
 * Sunglasses increases resistance to status by 5%.
 * Purple Glasses increases resistance to status by 10%.
 * Geek Glasses increases resistance to status by 15%.
 * Eye Mask adds immunity to.
 * Dark Blinder adds immunity to and 2% tolerance to Stun effect.

Patches

 * Patch (2014 Feb. 05)
 * The items "Cure Free" and "Throw Cure Free" are added to the abnormal recovery list of [Darkness] and [Confusion].
 * Patch (2013)
 * Blind bug has been fixed.
 * Patch (2013 Apr.)
 * A bug cropped up in Ragnarok Online, which causes the status to continue long after the visual effect has worn off.