Cornea - Outer transparent surface of the eye, Dispersion - Splitting light into a spectrum, IncidentRay - Light ray that hits a surface, Iris - Coloured ring of muscle that controls the size of the pupil in the eye, Lens - Part of the eye that focuses light onto the retina, Opaque - An object that does not allow light through, PrimaryColours - 3 colours, red, blue and green, that combine to give all the other visible colours, Pupil - The hole in the eye that allows light in, ReflectedRay - Light ray tht bounces off a surface, Refraction - The bending of light when it moves from one material to another of different density, Retina - Light sensitive surface at the back of the eye, Spectrum - A range of light colours, Transparent - A material that allows light to pass through it,

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