Identify and explain the functions of parts of the eye and correct myopia.

Welcome back Bontlee — missed you this week. Here are the answers to your questions: 2.6.1: Identify part F. Part F is the optic nerve. 2.6.2: State ONE function of part B. Part B is the lens. Its function is to focus light rays onto the retina. 2.6.3: Explain why the light rays must focus on part D rather than on part E. Light rays must focus on part D (the retina) because the retina contains photoreceptor cells (rods and cones) that convert light into electrical signals. If light focuses on part E (in front of the retina), the image formed on the retina will be blurry, leading to unclear vision. 2.6.4: Name the type of lens that is used to correct the visual defect shown in the diagram. The visual defect shown is myopia (nearsightedness), where light focuses in front of the retina. This is corrected using a concave lens. 2.6.5: Describe how the type of lens named in QUESTION 2.6.4 corrects the visual defect. A concave lens is a diverging lens. When placed in front of the eye, it causes the incoming parallel light rays to spread out slightly before they enter the eye. This divergence ensures that the eye's own lens then focuses these rays further back, precisely onto the retina (part D), correcting the blurry vision. 2.6.6: Name the TWO muscles found in part G. Part G is the iris. The two muscles found in the iris are the circular muscles (or sphincter pupillae) and the radial muscles (or dilator pupillae). Drop the next question 📸