Basics of Ophthalmology for Dental Students
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Questions and Answers

Which part of the eye is responsible for admitting light into the eye and serving as the main refractive surface?

  • Sclera
  • Iris
  • Retina
  • Cornea (correct)
  • Which structure forms the colored part of the eye and contains a central opening called the pupil?

  • Ciliary body
  • Choroid
  • Iris (correct)
  • Retina
  • What is the main function of the uveal tract in the eyeball?

  • Nutrition (correct)
  • Protection
  • Refractive surface
  • Vascularization
  • The size of the eyeball is approximately:

    <p>24 mm in diameter</p> Signup and view all the answers

    Which part of the outer coat of the eyeball is posterior, white, opaque, and tough?

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

    In what direction can the eyeball move due to the presence of extraocular muscles?

    <p>In all directions</p> Signup and view all the answers

    Which part of the eye is pierced by the optic nerve?

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

    What is the diameter of the cornea?

    <p>$11$ mm</p> Signup and view all the answers

    What is the main function of extraocular muscles?

    <p>To allow free movement of eyeball in all directions</p> Signup and view all the answers

    Which layer of the eyeball is vascular, pigmented, and nutritive?

    <p>Uveal tract</p> Signup and view all the answers

    What forms the main refractive surface of the eye?

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

    What is the most common cause of iridocyclitis due to localized eye disease?

    <p>Corneal ulcers</p> Signup and view all the answers

    Which of the following is a symptom of iridocyclitis?

    <p>Blurring of vision</p> Signup and view all the answers

    What is the treatment for iridocyclitis?

    <p>Local corticosteroid eye drops and ointment</p> Signup and view all the answers

    What is the definition of optic neuritis?

    <p>Inflammation of the optic nerve</p> Signup and view all the answers

    Which condition is characterized by rapid diminution of vision and pain with ocular movements?

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

    What is the effect of oro-dental diseases on eye surgeries?

    <p>Lowering resistance of the eye to infections</p> Signup and view all the answers

    What is the definition of glaucoma?

    <p>Increase in intraocular pressure with optic nerve head affection</p> Signup and view all the answers

    What is a common symptom of acute primary glaucoma?

    <p>Colored haloes around lights</p> Signup and view all the answers

    What causes retinal detachment?

    <p>Separation of the neurosensory retina from the underlying choroid</p> Signup and view all the answers

    What is proptosis (exophthalmos)?

    <p>Protrusion of the eyeball forward</p> Signup and view all the answers

    What is squint (strabismus)?

    <p>Condition where the two visual axes are not parallel in any direction of gaze</p> Signup and view all the answers

    What causes orbital fractures?

    <p>Road traffic accidents, sports injuries, or civil violence</p> Signup and view all the answers

    Which muscle is responsible for raising the eyelid?

    <p>Levator palpebrae superioris</p> Signup and view all the answers

    What is the function of the choroid?

    <p>Highly pigmented and responsible for nutrition of adjacent structures</p> Signup and view all the answers

    Which part of the eye is most responsible for night vision?

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

    Which part of the eye is insensitive to light and is known as the 'blind spot'?

    <p>Optic disc</p> Signup and view all the answers

    Which structure is responsible for secreting the aqueous humor to control intraocular pressure?

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

    What is the function of the lacrimal gland?

    <p>Produces tears to keep the ocular surface moist</p> Signup and view all the answers

    Which part of the bony orbit separates the roof from the lateral wall?

    <p>Superior orbital fissure</p> Signup and view all the answers

    What is the clinical presentation of orbital cellulitis?

    <p>Localized pain in the eye, proptosis, and limited eye movements</p> Signup and view all the answers

    What causes orbital cellulitis?

    <p>Infection from oral cavity or dental infections</p> Signup and view all the answers

    What is a typical symptom of phlyctenular kerato-conjunctivitis?

    <p>Ocular pain and light sensitivity</p> Signup and view all the answers

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