Overview of the Eye Structures
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Questions and Answers

What is the role of the iris in the eye?

  • To contain pigment cells that give the eye its color
  • To provide adjustable refraction to focus light
  • To control the size of the pupil (correct)
  • To transmit light from the cornea to the lens

    • What is the primary function of the pupil?

  • To allow light to enter and stimulate the retina (correct)
  • To provide a fixed refraction to focus light
  • To control the size of the iris
  • To control the color of the eye

    • What is the innervation of the sphincter pupillae muscle?

  • Parasympathetic nervous system (correct)
  • Both sympathetic and parasympathetic nervous systems
  • Sympathetic nervous system
  • Neither the sympathetic nor parasympathetic nervous systems

    • Which muscle group in the iris is responsible for pupil dilation (mydriasis)?

    <p>Dilator pupillae</p> Signup and view all the answers

    Which structure in the eye provides adjustable refraction to focus light onto the retina?

    <p>Lens</p> Signup and view all the answers

    What is the function of the cornea in the eye?

    <p>To provide fixed refraction to focus light onto the retina</p> Signup and view all the answers

    What is the innervation of the dilator pupillae muscle group in the iris?

    <p>Sympathetic nervous system</p> Signup and view all the answers

    Which of the following is the primary function of the pupil?

    <p>To allow light to enter and stimulate the retina</p> Signup and view all the answers

    What is the primary function of the lens in the eye?

    <p>To provide adjustable refraction to focus light onto the retina</p> Signup and view all the answers

    Which muscle group in the iris is responsible for pupil constriction (miosis)?

    <p>Sphincter pupillae</p> Signup and view all the answers

    What is the innervation of the sphincter pupillae muscle group in the iris?

    <p>Parasympathetic nervous system</p> Signup and view all the answers

    Which structure in the eye provides fixed refraction to focus light onto the retina?

    <p>Cornea</p> Signup and view all the answers

    What is the function of the iris in the eye?

    <p>To control the size of the pupil</p> Signup and view all the answers

    Which structure in the eye provides adjustable refraction to focus light onto the retina?

    <p>Lens</p> Signup and view all the answers

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