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Published bySolomon Maxwell
Modified over 6 years ago
Year 9 @E Science
Cornea Transparent outer covering of the eye It is convex in shape to allow the light that passes through it to be refracted Cornea
Pupil Black part of our eye Allows the light to enter into the eye Changes size to vary the amount of light that can enter the eye Bright light – small Dim light – large, dilated Pupil
Iris Coloured part of the eye that surrounds the pupil Contains muscles that change the size of the pupil depending on the amount of light in the environment Iris
Lens Biconvex shaped lens Refracts the light so that it focuses on the retina at the back of the eye Muscles change its shape to help us focus both near and far Lens
Retina Surface at the back of the eye Contains the photoreceptors that receive the light Rods – detect black and white and movement Cones – detect colour Retina
Optic nerve Receives all the information from the photoreceptors in the retina Sends the information to the brain for processing Optic nerve
Aqueous humour Found between the cornea and the lens Maintains the curved shape of the cornea to allow for the appropriate degree of refraction Nourishes the cornea and lens Aqueous humour
Vitreous humour Found between the lens and retina Jelly like substance that maintains the shape of the eye and keeps the retina in place Vitreous humour
Video https://www.youtube.co m/watch?v=syaQgmxb5i 0 https://www.youtube.co m/watch?v=syaQgmxb5i 0
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18.4 Seeing Light Pg
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