P A R T S O F Viviana Guzman 4/28/14 Life science Period 5 T H E E Y E WHAT IS THE EYE? • The eye is each of a pair of globular organs in the head through which people and vertebrate animals see, the visible part typically appearing almond-shaped in animals with eyelids. TEAM 1-ANATOMY:THE STRUCTURE OF THE EYE What are some of the parts of the eye? • The Iris is a flat, colored, ring-shaped membrane behind the cornea of the eye, with an adjustable circular opening (pupil) in the center. The Iris main job is to block the pupil and let just enough light in the pupil. If there's not enough light it allows the pupil to widen and open up more. Other then that the Iris is a beautiful creation of your eyes. It is a gorgeous, colorful, extraordinary piece of art. • The outer layer of our eye is called the Cornea. The cornea is the transparent layer forming the front of the eye. It is almost like a clear ball protecting the inside. • The crystalline Lens is the transparent, biconvex structure in the eye that, along with the cornea, helps to refract light to be focused on the retina. THE “WHITE” PART OF THE EYE • the “WHITE” PART OF THE EYE IS CALLED THE Conjunctiva is the mucous membrane that covers the front of the eye and lines the inside of the eyelids. EXAMPLE OF BAD AND HEALTHY CONJUNCTIVA TEAM 2-FOCUS • When the eye is relaxed and the interior lens is the least rounded, the lens has its maximum focal length for distant viewing . As the muscle tension around the ring of muscle is increased and the supporting fibers are thereby loosened, the interior lens rounds out to its minimum focal length LET'S SEE WHAT YOU KNOW SO FAR! • What is the eye? • Name four parts of the eye? • Which is the outer layer of your eye? 1. Iris 2. Pupil 3. Cornea • Do your cones in your eye allow you to see color? 1. True 2. false HOW EYE ACCOMMODATION WORKS WHAT'S IN THE BACK? w h a t ' s • I N T H E B A C K O F Y O U R E Y E ? in THE BACK OF YOUR EYE YOU HAVE WHAT IS CALLED THE RETINA. THE RETINA IS a layer at the back of the eyeball containing cells that are sensitive to light and that trigger nerve impulses that pass via the optic nerve to the brain, where a visual image is formed. DO YOU UNDERSTAND, YES, NO, MAYBE SO? • WHAT IS THE RETINA? • What is the “white” part of the eye called? 1. Conjunctiva 2. Iris 3. Cornea Got everything correct? Great!!