Health and Social Care Unit 4 - Sensory Systems - Eye 0.0 / 5 ? Health & Social CareEyeBTEC NationalAQA Created by: Lauren IvankoCreated on: 26-06-20 08:40 How does light enter the eye? Light is reflected by objects, we look at them and light travels as rays into our eyes 1 of 14 How do rays enter our eyes from distant objects? They enter our eyes as parallel lines and they need refraction 'bending' 2 of 14 What is the Pupil? Opening of the middle eye 3 of 14 What does the Pupil do? It allows light to enter the eye 4 of 14 What does the Iris do? Controls how much light can enter our eye, these are rings of muscles 5 of 14 What are Humours? These contain jelly like fluid that keeps the eye shaped and nourished 6 of 14 What is the Conjunctiva? This is a protective membrane 7 of 14 Where is the Cornea located? At the front of the eye 8 of 14 What does the Cornea do? It is transparent, which allows light to be let in 9 of 14 What is the Retina? This is a light sensitive surface at the back of the eye 10 of 14 What is the Macula? These are a group of concentrated cones, at the back of the eye in the center of the retina 11 of 14 What is the Optic Nerve? These are light sensitive cells, rods and cons are made up of this 12 of 14 What is the role of the Ciliary Muscle? These contract and stretch the lens to make it flatter and thinner 13 of 14 Where is the lens located? At the back of the pupil 14 of 14
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