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 their hands, and is sentenced to death. Moiraine, Lan, and Nynaeve rescue Egwene and Perrin, and all are reunited with Rand and Mat. Thereafter Moiraine determines that Mat must travel to Tar Valon, the Aes Sedai's center of power, to overcome the influence of Shadar Logoth. Loial warns Moiraine of a threat to the Eye of the World, a pool of Saidin untouched by the Dark One's influence, which is confirmed by vivid and disturbing dreams Mat, Rand, and Perrin have had. The Eye of the World is protected by Someshta (the Green Man) and contains one of the seven