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
Heart's Desire (The Outer Limits) Heart's Desire (The Outer Limits) "Heart's Desire" is an episode of "The Outer Limits" television show (new series). It was first aired on 28 February 1997, during the third season. It is set in the town of Heart's Desire in the Oregon Territory in 1872. In the episode, a visitor from another world takes over the body of a human preacher. He gives four outlaws a special energy power, which they can use to destroy anything they wish as long as they "want it more than anything else". The first outlaws to be given these powers are two friends, Frank