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Human sight

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  • Where do your tears come from?
    Lacrimal glands
  • What are the 3 layers of the eyeball?
    Sclera, choriod and retina
  • What happened to the image formed on the retina?
    It’s inverted
  • What’s the name of the white part of the eye?
    Sclera
  • How much does the human eye weigh?
    About 7 grams
  • Which parts of the eye help keep the eye clean?
    The eyelid and the eyelashes
  • What’s the name of the colored part of the eye?
    Iris
  • What parts of the eye do light rays have to pass through before they get to the lens?
    The cornea, the aqueous lens and the pupil
  • Which part of the eye enlarges or contracts depending on the amount of light that comes in?
    The pupil
  • What is it called when the lens becomes more rounded to focus on objects nearer and flatter to focus on objects farther?
    Accommodation
  • Which part of the eye helps it focus?
    The cornea
  • What is the jelly like part of the eye that helps keep its form called?
    Vitreous humour
  • How does the eyelid help keep the eye clean?
    By opening and closing many times
  • What controls eye movement ?
    Extraocular muscles
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