Human eye of the size of the pupil, regulation and suppression of the hormone melatonin and entrainment of the body clock. The eye is not shaped like a perfect sphere, rather it is a fused two-piece unit, composed of the anterior segment and the posterior segment. The anterior segment is made up of the cornea, iris and lens. The cornea is transparent and more curved, and is linked to the larger posterior segment, composed of the vitreous, retina, choroid and the outer white shell called the sclera. The cornea is typically about 11.5 mm (0.3 in) in diameter, and 1/2 mm (500
The Eye of the World seals on the Dark One's prison, the Dragon banner of Lews Therin Telamon, and the Horn of Valere. At the civilized world's border, the group enters the Blight (the polluted region under the Dark One's control) to protect the Eye. After a pursuit they meet the Green Man and he reveals the Eye. The group is then confronted by the Forsaken Aginor and Balthamel. As battle ensues, Balthamel and the Green Man slay each other. Soon after, Rand defeats Aginor and uses the Eye to decimate the Trolloc army and defeat Ba'alzamon. As a result, Moiraine concludes that Rand is