CORNEA - Thick transparent layer that protects the eye., IRIS - Coloured ring of muscle that controls the size of the pupil., PUPIL - Hole where light passes through., LENS - Focus the light rays on the retina., RETINA - Layer of light sensitive cells that changes light into electrical signals., CONES - Cells of the retina that perceives colors., OPTIC NERVE - Carries the electrical signals to the brain.,

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