P3.1- The Eye 0.0 / 5 ? PhysicsLight and OpticsGCSEAQA Created by: chocolatehousesCreated on: 25-04-15 14:15 Light converges on the retina 1 of 15 Path of rays is changed by the eye by refraction (carried out by the cornea and the lens) 2 of 15 Ciliary muscles change the shape of the lens 3 of 15 Which keep the image focussed on retina if the distance alters 4 of 15 contracted muscles= loose ligament=lens more rounded= focus on nearby objects 5 of 15 relaxed ciliary muscles= lens flattened=focus on distant objects 6 of 15 Far point is at infinity 7 of 15 You need glasses when the lens doesn't focus the image exactly on the retina 8 of 15 Myopia is short sighted 9 of 15 So... the image is formed before the retina which leads to a blurred image 10 of 15 And it's corrected by a diverging lens- the rays diffract outwards slightly so that the lens focusses on the retina 11 of 15 Hyperopia is long sight 12 of 15 So.. the image is focussed behind the retina qhich also leads to a blurred image 13 of 15 Corrected by a converging lens 14 of 15 For questions involving cameras the film is the light sensetive thing 15 of 15
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