Cornea - Refracts (bends) light as it enters the eye, Iris - Controls how much light enters the eye, Lens - Refracts light further to focus on the retina, Retina - Contains the light receptors: cones and rods. Rods are more sensitive, so help to see in dim light. The three types of cone cells help to see in colour., Optic nerve - Carries impulses between the eye and the brain, Sclera - Tough white outer layer of the eye; it helps to protect the eye from injury, The Pupil Reflex - The size of the pupil changes in bright and dim light. The reflex action contracts and relaxes the muscles., Cone Cells - Allows us to see in colour., Rod Cells - Allows us to see in low light (black and white only)., Fovea - Contains only cone cells; where the light is focused., Ciliary Muscle - Contracts and thickens the lens, or relaxes and stretches the lens, Suspensory Ligaments - Connected to the lens and ciliary muscles., Hyperopia - Long-sightedness, Myopia - Short-sightedness,
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The Eye
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Vpeake925
GCSE
Y11
Biology
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