Anatomy of the Eye: Vascular Layer and Ciliary Body
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Questions and Answers

What is the main function of the circularly arranged sphincter pupillae?

  • Increases pupil diameter
  • Supports nonvisual retina
  • Reinforces light-absorbing property of the choroid
  • Decreases pupil diameter (correct)

    • Which muscle is responsible for dilating the pupil?

  • Circularly arranged sphincter pupillae
  • Radially arranged dilator pupillae (correct)
  • Optic part of the retina
  • Nonvisual part of the retina

    • What is the main function of the pigmented layer in the retina?

  • Reinforces light-absorbing property of the choroid (correct)
  • Increases pupil diameter
  • Supporting cells
  • Decreases pupil diameter

    • Which part of the retina extends over the ciliary body and iris?

    <p>Nonvisual retina</p> Signup and view all the answers

    What are the two functional parts of the optic part of the retina?

    <p>Neural layer and pigmented layer</p> Signup and view all the answers

    Which muscle decreases its diameter to constrict or contract the pupil?

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

    What is responsible for the 'red eye' reflection in flash photography?

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

    Which part of the eye connects the choroid with the circumference of the iris?

    <p>Ciliary body</p> Signup and view all the answers

    What fills the anterior segment of the eyeball, suspensory ligament, and ciliary body?

    <p>Aqueous humor</p> Signup and view all the answers

    Which structure on the internal surface of the ciliary body secretes aqueous humor?

    <p>Ciliary processes</p> Signup and view all the answers

    What is the central aperture in the iris called?

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

    What controls the thickness and focus of the lens in the eye?

    <p>Ciliary body</p> Signup and view all the answers

    What nerve provides innervation to the cornea?

    <p>Ophthalmic nerve (CN V1)</p> Signup and view all the answers

    Which layer of the eyeball is responsible for nourishing the avascular cornea?

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

    What causes severe pain when small foreign bodies are in contact with the cornea?

    <p>Drying of the corneal surface</p> Signup and view all the answers

    Where is the limbus of the cornea located?

    <p>At the junction of sclera and cornea</p> Signup and view all the answers

    Which layer forms the largest part of the vascular layer of the eyeball?

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

    What is responsible for supplying the light-sensitive layer of the retina with oxygen and nutrients?

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

    What is the function of the central retinal artery in the retina?

    <p>Supplies blood to the neural layer of the retina</p> Signup and view all the answers

    Which structure appears darker at the posterior pole of the eyeball?

    <p>Macula lutea</p> Signup and view all the answers

    How are the layers of the developing retina separated in the embryo?

    <p>By intraretinal space</p> Signup and view all the answers

    What is the significance of detachment of the retina?

    <p>Detachment can lead to loss of vision and requires medical attention</p> Signup and view all the answers

    What is the function of an ophthalmoscope in examining the eye?

    <p>To view the fundus of the eye</p> Signup and view all the answers

    Where do retinal arteries and veins radiate from over the fundus in the eye?

    <p>From the optic disc</p> Signup and view all the answers

    What is the function of the fibrous layer of the eyeball?

    <p>Offers resistance and gives shape to the eyeball</p> Signup and view all the answers

    Which part of the eye is visible through the transparent bulbar conjunctiva as 'the white of the eye'?

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

    How does the convexity of the cornea compare to that of the sclera?

    <p>The cornea has greater convexity than the sclera</p> Signup and view all the answers

    From where does the cornea receive its nourishment?

    <p>Lacrimal fluid and aqueous humor</p> Signup and view all the answers

    Which part of the eye covers the posterior five sixths of the eyeball?

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

    What provides attachment for both extrinsic and intrinsic muscles of the eye?

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

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