the eye

    Cards (14)

    • What is the primary function of the eye?

      To detect light as a sensory receptor
    • How does the brain process information from the eye?

      It sends electrical impulses along sensory neurons to the brain
    • What are the main parts of the eye involved in focusing light?
      • Iris (controls light entry)
      • Cornea (initial light focus)
      • Lens (fine-tunes focus)
      • Retina (contains receptor cells)
    • What role do rods and cones play in the retina?

      They detect light and form an image
    • What happens to the image in the retina?

      Nerves in the retina convert the image into electrical impulses
    • What is the pathway of signals from the retina to the brain?

      Signals are sent along the optic nerve
    • How does the eye lens adjust for focusing on objects at different distances?

      • Distant objects: lens is less curved
      • Near objects: lens is more curved
    • What are common eye problems?
      • Colour blindness
      • Cataracts
      • Long-sightedness
      • Short-sightedness
    • What is long-sightedness and how is it corrected?

      It is the inability to focus on near objects, corrected with converging lenses
    • What is short-sightedness and how is it corrected?

      It is the inability to focus on distant objects, corrected with diverging lenses
    • What occurs in cataracts?

      The lens becomes cloudy, preventing light from passing through properly
    • How are cataracts corrected?

      By replacing the cloudy lens with a clear artificial lens
    • What causes colour blindness?

      It occurs when one of the color-detecting receptors (red, green, blue) does not work
    • Who is most likely to inherit colour blindness?

      It is most likely inherited by males