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Chapter 14 The Human Eye How Do We See? 25 March 2017

Published byWyatt Calhoun Modified over 10 years ago

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Presentation on theme: "Chapter 14 The Human Eye How Do We See? 25 March 2017"— Presentation transcript:

1 Chapter 14 The Human Eye How Do We See? 25 March 2017
Biology Matters textbook page 278 Figure 14.7 Figure 14.7 page 278

2 How Do We See? Light rays are refracted through the cornea and the aqueous humour onto the lens 1 lens cornea object aqueous humour Copyright © Marshall Cavendish International (Singapore) Pte. Ltd. Copyright © Marshall Cavendish International (Singapore) Pte. Ltd. 25 March 2017 25 March 2017 2 2

3 How Do We See? Light rays are refracted through the cornea and the aqueous humour onto the lens The lens causes further refraction 1 lens cornea object 2 aqueous humour Copyright © Marshall Cavendish International (Singapore) Pte. Ltd. Copyright © Marshall Cavendish International (Singapore) Pte. Ltd. 25 March 2017 25 March 2017 3 3

4 How Do We See? Light rays are refracted through the cornea and the aqueous humour onto the lens The lens causes further refraction 1 lens Rays converge to focus on retina cornea object 2 retina 3 aqueous humour Copyright © Marshall Cavendish International (Singapore) Pte. Ltd. Copyright © Marshall Cavendish International (Singapore) Pte. Ltd. 25 March 2017 25 March 2017 4 4

5 How Do We See? Light rays are refracted through the cornea and the aqueous humour onto the lens The lens causes further refraction 1 lens Rays converge to focus on retina cornea object 2 retina 3 aqueous humour image 4 The image on the retina stimulates either the rods or the cones, depending on the intensity of the light Copyright © Marshall Cavendish International (Singapore) Pte. Ltd. Copyright © Marshall Cavendish International (Singapore) Pte. Ltd. 25 March 2017 25 March 2017 5 5

6 How Do We See? Light rays are refracted through the cornea and the aqueous humour onto the lens The lens causes further refraction 1 lens Rays converge to focus on retina cornea object 2 retina 3 aqueous humour image 4 The image formed is inverted laterally inverted diminished in size The image on the retina stimulates either the rods or the cones, depending on the intensity of the light Copyright © Marshall Cavendish International (Singapore) Pte. Ltd. Copyright © Marshall Cavendish International (Singapore) Pte. Ltd. 25 March 2017 25 March 2017 6 6

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