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Listed under: Science > Life > Animal structure and function > Body systems > Nervous system > Sense organs > Eyes

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BTN: Colour blindness - seeing the world differently

TLF-IDM018671

The ability to see colours is an important human trait, but did you know some people's colour vision is impaired. View this clip to discover what it means to be colourblind and how it happens. Find out also about the extraordinary colour vision of the dunnart, and why it is important for this nocturnal marsupial.

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How does the retina work?

TLF-IDM019617

When electrons in your retina absorb photons of light they don't emit light, they cause a molecule to change shape - and that lets you see colour!