The Great Green Eye

But Sauron was not of mortal flesh, and though he was robbed now of that shape in which had wrought so great an evil, so that he could never again appear fair to the eyes of Men, yet his spirit arose out of the deep and passed as a shadow and a black wind over the sea, and came back to Middle-earth and to Mordor that was his home. There he took up again his great Ring in Barad-dur, and dwelt there, dark and silent, until he wrought himself a new guise, an image of malice and hatred made visible; and the Eye of Sauron the Terrible few could endure.The Eye: that horrible growing sense of a hostile will that strove with great power to pierce all shadows of cloud and earth, and flesh, and to see you: to pin you under its deadly gaze, naked, immovable.

But Irmo, master of vision, resting in his forest sought out Yavanna, Queen of the Earth and Giver of Fruits, so that they may curse Sauron, Melkors first lieutenant. And being great in the knowledge of the kelvar and olvar and their sublime wishes, they wished to protect these from the dark forges of Minas-Morgul. Narry did they sleep nor eat till they had wrought a spell that combined the dreams of Lorien and the prevailing wisdom of Yavanna; a spell so powerful, for powerful it must be so that Melkor can not undue it, that it drew the gaze of the Eye to the subjects of the spouse of Aulë! And with time - unable to disentangle the bane - the Lidless Eye turned into various hues of green.

And after the passing of ages the Great Eye could bear no more the curse and decided ´twould be best if he fell into the void!
After the fall of the Eye the Atani forebade any such object that portraid the evil of ancient times.
But this parchment survived for my great-great-grandsire took it from the great library in Minas Tirith along with a talon of an accursed fell beast.

The first part is taken from the Silmarillion; the second and third part I wrote!

Don´t forget to comment!