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 Silence The Eye of Silence The Eye of Silence (), 1943–44, is a painting by German dadaist and surrealist Max Ernst. For "The Eye of Silence" Ernst employed a technique called decalcomania to create arbitrary textures on the canvas, which he then reworked to resemble rock formations and forms of animals, plants, and architecture. The imagery on the surrealist canvas has been described as a primordial-like landscape, "in which rock-hard and gelatinous formations coexist under a forbidding sky." "The Eye of Silence" has also been described as, "part vegetation, part rock and part bejewelled baroque palace. A fusion of animal, mineral