Soft Torics in Optics
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Questions and Answers

What percentage of the population has cylinders over 0.75DC?

  • 38% (correct)
  • 50%
  • 25%
  • 60%
  • What percentage of patients are not fitted with a toric lens when they should be?

  • 10% (correct)
  • 15%
  • 5%
  • 20%
  • What is the primary mechanism by which toric lenses rely on the blink reflex?

  • Cyclo-rotation of the eye
  • Nasal rotation of the lower lid
  • Vertical movement of the upper lid (correct)
  • Horizontal movement of the lower lid
  • What is a potential drawback of using prism ballast for stabilization?

    <p>Reduced oxygen transmission</p> Signup and view all the answers

    Which of the following is a characteristic of dynamic stabilization zones?

    <p>Edge is thinner</p> Signup and view all the answers

    What is the significance of knowing the stabilization design of a particular toric lens?

    <p>It can affect the performance of the lens on the eye</p> Signup and view all the answers

    What is a potential consequence of using a toric lens with a thick edge?

    <p>Reduced oxygen transmission</p> Signup and view all the answers

    What is an advantage of aspheric optics over torics?

    <p>Better for small cylinders</p> Signup and view all the answers

    What is a potential advantage of using daily disposables for toric lenses?

    <p>Reduced risk of neovascularisation</p> Signup and view all the answers

    What is the name of the design used in Acuvue Oasys for Astigmatism?

    <p>Precision Balance 8/4 design</p> Signup and view all the answers

    Why is the zipper effect important in toric lenses?

    <p>It assists in the orientation of the lens during blinking</p> Signup and view all the answers

    What is the primary advantage of dynamic stabilization zones?

    <p>They provide easier orientation of the lens</p> Signup and view all the answers

    Why may patients experience neovascularization with hydrogel prism-ballasted toric lenses?

    <p>Due to the low oxygen transmission</p> Signup and view all the answers

    What is a potential drawback of using toric lenses with a thick edge?

    <p>Reduced comfort</p> Signup and view all the answers

    Why are daily disposables an attractive option for toric lenses?

    <p>They eliminate the need for cleaning and maintenance</p> Signup and view all the answers

    What is the primary purpose of stabilization designs in toric lenses?

    <p>To orient the lens correctly</p> Signup and view all the answers

    Why is it important to know the stabilization design of a particular toric lens?

    <p>To troubleshoot issues with lens rotation</p> Signup and view all the answers

    What is the significance of the 10% statistic mentioned in the text?

    <p>10% of patients are not fitted with a toric lens when they should be</p> Signup and view all the answers

    How do aspheric optics compare to torics?

    <p>Aspheric optics are better for small cylinders</p> Signup and view all the answers

    What is the purpose of the Accelerated Stabilization Design (ASD) in toric lenses?

    <p>To assist in the orientation of the lens</p> Signup and view all the answers

    What is a characteristic of Soflens daily disposable toric lenses?

    <p>They are designed for early presbyopes</p> Signup and view all the answers

    What is the purpose of the 'zipper effect' in toric lenses?

    <p>To facilitate the stabilization of the lens</p> Signup and view all the answers

    What is a benefit of using daily disposables for toric lenses?

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

    What is a potential consequence of using a toric lens with a thick edge?

    <p>Reduced oxygen transmission</p> Signup and view all the answers

    What percentage of the population has cylinders over 2.00DC?

    <p>7%</p> Signup and view all the answers

    What is a characteristic of dynamic stabilization zones?

    <p>Thinner edge</p> Signup and view all the answers

    What is the significance of knowing the stabilization design of a particular toric lens?

    <p>To determine the best stabilization design for a patient</p> Signup and view all the answers

    What is a benefit of aspheric optics compared to torics?

    <p>Better for small cylinders</p> Signup and view all the answers

    What is the function of the upper lid in the 'zipper effect'?

    <p>To move up and down vertically</p> Signup and view all the answers

    What percentage of soft lenses are torics?

    <p>28%</p> Signup and view all the answers

    What percentage of patients may benefit from aspheric optics over torics?

    <p>7%</p> Signup and view all the answers

    What is a potential drawback of using prism ballast for stabilization?

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

    What is the primary mechanism by which dynamic stabilization zones rely on the blink reflex?

    <p>Upper lid moving up and down vertically</p> Signup and view all the answers

    What is a benefit of using daily disposables for toric lenses?

    <p>Reduced risk of neovascularization</p> Signup and view all the answers

    What is a characteristic of the Accelerated Stabilization Design (ASD) in toric lenses?

    <p>Thinner edges</p> Signup and view all the answers

    What is a potential consequence of using a toric lens with a thick edge?

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

    Why may gravity affect the performance of a prism-ballasted toric lens?

    <p>Gravity may rotate the lens</p> Signup and view all the answers

    What is a benefit of using aspheric optics compared to torics?

    <p>Better for small cylinders</p> Signup and view all the answers

    What is a characteristic of the 8/4 design in Acuvue Oasys for Astigmatism?

    <p>Dynamic stabilization zones</p> Signup and view all the answers

    What is a potential drawback of using SiHs compared to hydrogel torics?

    <p>Less common neovascularization</p> Signup and view all the answers

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