Quiz 1C
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Questions and Answers

What is the purpose of adapting the nerve ending on the lid margin to GP lenses?

  • To maintain exposure of the limbus
  • To allow the patient to get used to the GP lenses (correct)
  • To prevent waste products from contaminating the tear layer
  • To decrease tear exchange under the lens

    • Why is it important for the diameter of the lens to cover the entire cornea and go over the limbus?

  • To prevent irritation of the limbal region (correct)
  • To ensure exposure of the limbus which is good for eye health
  • To allow for 0.5mm movement of the lens
  • To diminish the limbal area ability to produce stem cells

    • What happens if a 14mm diameter lens is too large for a patient?

  • The edges of the lens will not sit properly under the upper and lower lid margin (correct)
  • The lens will displace upward, exposing the inferior limbal region
  • The lens will not adapt to the patient's eye
  • The patient will experience air bubbles in areas where base curve is excessively steep

    • What is the purpose of adding a flattening factor to the flat K value when determining base curve for a contact lens?

    <p>To match the base curve to corneal curvature</p> Signup and view all the answers

    What is the consequence of a base curve steeper than the corneal curvature?

    <p>Air bubbles in areas where base curve is excessively steep</p> Signup and view all the answers

    When a lens blinks, how much movement do we ideally want?

    <p>0.5mm of movement</p> Signup and view all the answers

    What is the primary reason for wanting 0.5mm movement when a lens blinks?

    <p>To allow for healthy tear exchange under the lens</p> Signup and view all the answers

    Why might a soft contact lens be a poor fit for a patient with larger HVID and/or steeper corneal curvature?

    <p>It does not consider sagittal depth of the cornea</p> Signup and view all the answers

    Why might custom diameter lenses be needed for patients with larger or smaller HVID?

    <p>To match diameter to cover entire cornea and go over limbus</p> Signup and view all the answers

    What is the main reason for considering whether to fit a patient with soft or GP lenses?

    <p>The patient's comfort level</p> Signup and view all the answers

    What is a drawback of GP lenses compared to soft lenses?

    <p>They are initially less comfortable</p> Signup and view all the answers

    What is a potential problem associated with reusable lenses?

    <p>They can lead to protein deposits causing conjunctivitis</p> Signup and view all the answers

    What is the effect of wearing soft lenses for occasions that they do not need to be worn?

    <p>Less distinct quality of vision</p> Signup and view all the answers

    Why is Atropine drop by itself not as effective?

    <p>It does not provide as much success as other options</p> Signup and view all the answers

    What is a benefit of GP lenses compared to soft lenses?

    <p>They are less likely to be abused by patients</p> Signup and view all the answers

    What is a potential drawback of wearing GP lenses?

    <p>'The patient's comfort level' is initially affected</p> Signup and view all the answers

    What is the main consideration for patients buying multi-package lenses?

    <p>'Backup lenses' for occasions when they do not need to wear soft lenses</p> Signup and view all the answers

    Why is the autoimmune reaction more of an issue with reusable lenses?

    <p>'Protein deposits' causing giant papillary conjunctivitis with these lenses</p> Signup and view all the answers

    What makes GP lenses a good option when quality of vision matters?

    <p>'Variety of diameters and base curves' available with these lenses</p> Signup and view all the answers

    Why do patients buy multi-package soft lenses?

    <p>'Backup lenses' for occasions when they do not need to wear soft lenses.</p> Signup and view all the answers

    Why are soft lenses more comfortable from the very beginning?

    <p>The 'patient's comfort level' can adapt to it.</p> Signup and view all the answers

    What is the primary reason for considering whether to fit a patient with soft or GP lenses?

    <p>The comfort level of the patient when wearing the lenses</p> Signup and view all the answers

    Why are soft lenses more comfortable from the very beginning?

    <p>They adhere less to the surface of the eyes</p> Signup and view all the answers

    What is a potential problem associated with reusable lenses?

    <p>The autoimmune reaction causing protein deposits and giant papillary conjunctivitis</p> Signup and view all the answers

    What makes GP lenses a good option when quality of vision matters?

    <p>They provide more distinct quality of vision</p> Signup and view all the answers

    What is the consequence of a base curve steeper than the corneal curvature?

    <p>Less comfortable experience for the patient initially</p> Signup and view all the answers

    Why do patients buy multi-package soft lenses?

    <p>To have a back-up pair of lenses</p> Signup and view all the answers

    What is the purpose of adapting the nerve ending on the lid margin to GP lenses?

    <p>To minimize the discomfort caused by the presence of the lens</p> Signup and view all the answers

    Why might custom diameter lenses be needed for patients with larger or smaller HVID?

    <p>To cover the entire cornea and go over the limbus</p> Signup and view all the answers

    What happens if a 14mm diameter lens is too large for a patient?

    <p>The edges of the lens will irritate the stem cells on the limbal region</p> Signup and view all the answers

    What is a potential drawback of wearing GP lenses?

    <p>Risk of exposure of the inferior limbal region during blinking</p> Signup and view all the answers

    What is a drawback of soft lenses compared to GP lenses?

    <p>Greater likelihood of air bubbles due to base curve mismatch</p> Signup and view all the answers

    What is a potential problem associated with reusable lenses?

    <p>Risk of contamination of the posterior tear layer</p> Signup and view all the answers

    What is a benefit of GP lenses compared to soft lenses?

    <p>Reduced risk of exposure of the limbal region during blinking</p> Signup and view all the answers

    Why are soft lenses more comfortable from the very beginning?

    <p>They require minimal adaptation period for wearers</p> Signup and view all the answers

    What is the main consideration for patients buying multi-package lenses?

    <p>The convenience and ease of continuous wear</p> Signup and view all the answers

    What is a potential drawback of wearing soft lenses for occasions that they do not need to be worn?

    <p>Increased chance of contamination of the tear layer</p> Signup and view all the answers

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