Bring Archbishop Benedictus the Cursed Eye of Paleth. Benedictus is in the Cathedral of Light, in the city of Stormwind.
I can't lift the curse from the Eye of Paleth. The Eyes were crafted by Human Priests, so you'll have to go to Stormwind to find someone who can help you. Speak with Archbishop Benedictus. He is head of the Cathedral of Light in Stormwind. He can help.
I hope, for your sake.