The Human eye

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Slide 1

The Human Eye Learn the parts that make up the human eye and what their job is. Click here to start

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The Pupil: This part controls the amount of light that can pass through the Iris to the lens. In bright light, it gets smaller and in low light it gets larger. A

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The Cornea: This part protects the front of the eye and stops grit etc. damaging the lens B

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C Aqueous Humor: A layer of fluid that helps protect the eye from damage and also helps the eye to keep it’s shape

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D Cilliary Muscles: These connect to the lens by the suspensory ligaments and stretch or relax the lens to focus light onto the Retina

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E The Schlera: A tough protective layer around the eye. Keeps everything together and helps the eye keep it’s shape

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The Optic Nerve: This part carries electrical signals from the Retina to the Brain F

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G The Fovea: This is a dense collection of cones (light collecting cells) in the middle of the Retina

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H The Retina: This is the part of the eye that contains light sensitive cells called Rods (white light) and Cones (red, green or blue light)

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I Vitreous Humor: A jelly like substance that protects the eye and helps it keep it’s shape

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J The lens: The part of the eye that focuses light onto the Retina. It makes sure a sharpe image is received by the Brain

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The Iris: A protective layer that controls the amount of light getting into the eye. This is the part that gives you your Eye Colour K

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The eye receives light that is reflected off an objects. This light passes through the Pupil and is focused by the lens. The light is focused onto the Retina which contains light sensitive cells called Rods and Cones. These cells convert the light they receive into electrical messages that are then passed to the brain via the Optic Nerve. The brain converts these electrical messages or nerve impulses into the Image that we see.

Summary: An Interactive PowerPoint for revising parts of the Human Eye

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