CL Quiz 1A

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Questions and Answers

What is the effect of sleeping with contact lenses (CL) at night, according to the text?

  • Reduced lack of oxygen and less swelling
  • No change in oxygen levels or swelling
  • Improved vision and reduced redness
  • Increased lack of oxygen and more swelling (correct)

Why are high spectacle prescriptions challenging to fit with lenses?

  • They result in dry eyes at the end of the day
  • They cannot correct distorted retinal images
  • They are incompatible with contact lenses
  • They cause excessive magnification or minification (correct)

What is the FDA classification of contact lenses (CL), as mentioned in the text?

  • Class 2 (correct)
  • Class 1
  • Class 4
  • Class 3

Why should contact lenses not be exposed to tap water or lake water?

<p>To avoid introducing germs to the eye (B)</p> Signup and view all the answers

What does a pupil diameter smaller than the contact lens (CL) size lead to, especially in dim light?

<p>Blur at night (B)</p> Signup and view all the answers

What is considered a wet eye based on tear breakup time (TBUT)?

<p>Greater than 13 seconds (A)</p> Signup and view all the answers

What is the average assumed vertex distance for corneal curvature?

<p>11-12 mm (A)</p> Signup and view all the answers

What condition makes a patient unsuitable for cosmetic contact lenses?

<p>Extreme dry eye (B)</p> Signup and view all the answers

How does pregnancy affect corneal sensitivity and contact lens wearing?

<p>Increases corneal sensitivity and discomfort with prior CL (C)</p> Signup and view all the answers

Which type of disease causes incomplete closure of the lids and contributes to dryness in the eye?

<p>~Thyroid disorders (A)</p> Signup and view all the answers

What is the effect of taking anti-histamines while wearing contact lenses?

<p>To dry out mucus production and may cause dry eyes with CL (A)</p> Signup and view all the answers

Why are cosmetic lenses not recommended for patients with recurrent epithelial basement layer disruption?

<p>Result in microvilli loss and worsen dryness symptoms (A)</p> Signup and view all the answers

What is the main benefit of contact lenses compared to spectacles?

<p>Improved peripheral vision (A)</p> Signup and view all the answers

Why wouldn't a patient with severe dry eye be a good candidate for contact lenses?

<p>The benefits do not outweigh the risks (C)</p> Signup and view all the answers

What is the most appropriate recommendation for minimizing the risk of wearing contact lenses?

<p>Educating patients on appropriate contact lens care (A)</p> Signup and view all the answers

Why is not everyone a candidate for LASIK surgery?

<p>Potential for recurrent corneal erosions post-surgery (D)</p> Signup and view all the answers

What is the main advantage of wearing daily disposable contact lenses?

<p>Enhanced comfort throughout the day (A)</p> Signup and view all the answers

Why is it important to replace the contact lens case every 3 months?

<p>To minimize the risk of contamination (C)</p> Signup and view all the answers

What is a potential consequence of sleeping with contact lenses in terms of oxygen delivery to the eye?

<p>Reduced oxygen delivery to the cornea (D)</p> Signup and view all the answers

Why is it important to assess ocular tissue when considering a patient for contact lens use?

<p>To evaluate if the patient is a good candidate for contact lenses (B)</p> Signup and view all the answers

What type of wear involves wearing contact lenses for 30 consecutive days?

<p>Continuous wear (D)</p> Signup and view all the answers

What wear schedule is recommended for the healthiest option to minimize exposure to debris from previous days?

<p>Dailies wear (A)</p> Signup and view all the answers

What risk factor is associated with abusing contact lenses by not replacing them regularly?

<p>Increased risk of inflammation and infections (D)</p> Signup and view all the answers

What can soft contact lenses induce if worn for extended periods?

<p>Increased risk of corneal swelling (B)</p> Signup and view all the answers

What is the consequence of sleeping with contact lenses at night, according to the text?

<p>Decreased oxygen delivery to the eye (D)</p> Signup and view all the answers

What is the main advantage of wearing silicone hydrogel contact lenses?

<p>Higher oxygen permeability (B)</p> Signup and view all the answers

Why are patients with extreme dry eye not suitable candidates for cosmetic contact lenses?

<p>Symptoms worsen with cosmetic lens wear (C)</p> Signup and view all the answers

How does pregnancy affect contact lens wearing?

<p>Uncomfortable wearing of prior lenses (D)</p> Signup and view all the answers

Why should contact lenses not be exposed to tap water or lake water?

<p>Potential introduction of germs to the eye (A)</p> Signup and view all the answers

What is the effect of taking anti-histamines while wearing contact lenses?

<p>Reduced mucus production (A)</p> Signup and view all the answers

What type of condition can prevent patients from being suitable for cosmetic contact lenses?

<p>All of the above (D)</p> Signup and view all the answers

What is the main reason a patient might choose to wear contact lenses for cosmetic purposes, despite the associated risks?

<p>To have a wider visual field compared to wearing spectacles (A)</p> Signup and view all the answers

Why might a patient with severe dry eye not be a good candidate for contact lenses?

<p>The patient might be at a higher risk of ocular surface complications (D)</p> Signup and view all the answers

What is the recommended wear schedule for minimizing exposure to debris from previous days when wearing contact lenses?

<p>Dailies wear (D)</p> Signup and view all the answers

Why is it important to replace the contact lens case every 3 months?

<p>To reduce the risk of contamination from the outside and spread to the contact lenses (D)</p> Signup and view all the answers

What is a potential consequence of sleeping with contact lenses in terms of oxygen delivery to the eye?

<p>Reduction in oxygen delivery, leading to corneal swelling (C)</p> Signup and view all the answers

What type of wear schedule involves wearing contact lenses for 6-7 consecutive days before taking them off?

<p>Extended wear (A)</p> Signup and view all the answers

What is a potential consequence of abusing contact lenses by not replacing them regularly?

<p>Putting the ocular surface at risk and increasing the chance of ocular complications (B)</p> Signup and view all the answers

What is a reason some patients might be unsuitable candidates for LASIK surgery?

<p>Risk of recurrent corneal erosions post surgery (D)</p> Signup and view all the answers

What is considered a dry eye based on tear breakup time (TBUT)?

<p>Having a TBUT of less than 9 seconds (D)</p> Signup and view all the answers

What type of disease causes incomplete closure of the lids and contributes to dryness in the eye?

<p>Thyroid Disease (A)</p> Signup and view all the answers

What is one potential effect of wearing soft contact lenses for extended periods?

<p>The patient may not notice corneal swelling due to reduced oxygen delivery at night (C)</p> Signup and view all the answers

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