DP5 between myopia and hyperopia and outline how “distinguish technologies can be used to correct these conditions” Feature Myopia Hyperopia Cause of condition The ciliary muscles do The ciliary muscles does not relax enough causing not contract enough, the lens to be not fully leaving the lens still elongated causing too elongated, causing not much refraction enough refraction. Where image focuses Too short of the retina Past the Retina objects focus Close Objects Distant Objects correctly Diagram of lens used for Concave Lens Convex Lens correction DP6 how the production of two different images of a view can “explain result in perception” Some animals have forward facing eyes. This means that there is considerable overlap between the views on the left and the right. Because the two eyes are a few centimetres apart, each eye sees a slightly different view of an object. The images formed by each eye are superimposed by the brain, and because each view is slightly different, objects appear to have depth as well as height and breadth, that is we see in three dimensions. This is known as stereoscopic or binocular vision. This type of vision also makes it possible to judge distances of near objects. Climbing animals such as monkeys and predators such as cats have forward facing eyes, but grazing animals such as horses have eyes on the side of the head so they have a wider field of view. SC DP1 choose equipment or resources and perform a first-hand “plan, investigation to model the process of accommodation by passing rays of light through convex lenses of different focal lengths” A biconvex lens is shaped as shown in the diagram below. Convex lenses magnify images by causing rays of light to converge. The lens in the human eye is a convex lens. When parallel rays of light are passed through a convex lens, they will converge at a point, known as the focal point. The focal length of a lens is the distance of the focal point from the centre of the lens. Convex Lens SC DP2 information from secondary sources to describe changes “analyse in the shape of the eye’s lens when focusing on near and far objects” SC DP3 and analyse information from secondary sources to “process describe cataracts and the technology that can be used to prevent blindness from cataracts to discuss the implications of this technology for society”
DP5 “distinguish between myopia and hyperopia and outline how technologies can be used to correct these conditions” Feature Myopia Hyperopia Cause of condition The ciliary muscles do not relax enough causing the lens to be not fully elongated causing too much refraction The ciliary muscles does not contract enough, leaving the lens still elongated, causing not enough refraction. Where image focuses Too short of the retina Past the Retina objects focus correctly Close Objects Distant Objects Diagram of lens used for correction Concave Lens Convex Lens DP6 “explain how the production of two different images of a view can result in perception” Some animals have forward facing eyes. This means that there is considerable overlap between the views on the left and the right. Because the two eyes are a few centimetres apart, each eye sees a slightly different view of an object. The images formed by each eye are superimposed by the brain, and because each view is slightly different, objects appear to have depth as well as height and breadth, that is we see in three dimensions. This is known as stereoscopic or binocular vision. This type of vision also makes it possible to judge distances of near objects. Climbing animals such as monkeys and predators such as cats have forward facing eyes, but grazing animals such as horses have eyes on the side of the head so they have a wider field of view. SC DP1 “plan, choose equipment or resources and perform a first-hand investigation to model the process of accommodation by passing rays of light through convex lenses of different focal lengths” A biconvex lens is shaped as shown in the diagram below. Convex lenses magnify images by causing rays of light to converge. The lens in the human eye is a convex lens. When parallel rays of light are passed through a convex lens, they will converge at a point, known as the focal point. The focal length of a lens is the distance of the focal point from the centre of the lens. Convex Lens SC DP2 “analyse information from secondary sources to describe changes in the shape of the eye’s lens when focusing on near and far objects” SC DP3 “process and analyse information from secondary sources to describe cataracts and the technology that can be used to prevent blindness from cataracts to discuss the implications of this technology for society”
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