Ophthalmology Quiz: Lens Displacement and Intraocular Lens Tilting
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Questions and Answers

What type of eye problem does astigmatism belong to?

  • Cataracts
  • Color blindness
  • Glaucoma
  • Refractive errors (correct)
  • Which of the following is a common effect of astigmatism on vision?

  • Blurry vision (correct)
  • Increased color perception
  • Enhanced depth perception
  • Improved night vision
  • What is a significant visual symptom associated with astigmatism?

  • Bionic vision
  • Infrared vision
  • Ultraviolet vision
  • Distorted vision (correct)
  • Which term best describes the impact of astigmatism on vision clarity?

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

    What effect does astigmatism have on the sharpness of visual perception?

    <p>Reduces it</p> Signup and view all the answers

    Which condition is described as the tilting of the intraocular lens (IOL)?

    <p>Subluxation of the crystalline lens</p> Signup and view all the answers

    What is the term used to describe external pressure on the cornea or globe?

    <p>Lid tumor</p> Signup and view all the answers

    Which term represents the displacement of the refractive element of the 1-crystalline lens?

    <p>Tilting of the intraocular lens (IOL)</p> Signup and view all the answers

    What does subluxation refer to in the context provided?

    <p>Tilting of the intraocular lens (IOL)</p> Signup and view all the answers

    Which scenario involves external pressure on the cornea or globe?

    <p>Lid tumor</p> Signup and view all the answers

    Which degree of astigmatism is eye strain often more common and worse in?

    <p>Lower degree</p> Signup and view all the answers

    How does eye strain severity compare between lower and higher degrees of astigmatism?

    <p>More severe in lower degree</p> Signup and view all the answers

    What symptom is commonly associated with eye strain in astigmatism?

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

    Which type of pain is typically experienced alongside eye ache in astigmatism?

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

    In general, what is the relationship between eye strain and the severity of astigmatism?

    <p>Eye strain is worse in lower astigmatism</p> Signup and view all the answers

    What is the purpose of sclera buckling in the context of retinal detachment?

    <p>To stabilize the retina</p> Signup and view all the answers

    Which condition is usually treated with keratoconus surgery?

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

    What kind of corneal issue is associated with the growth of pterygium?

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

    In the context mentioned, what does 'sclera buckling' specifically target?

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

    Which of the following is a common consequence of corneal scarring?

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

    In irregular astigmatism, how are the two principal meridians of maximum and minimum curvature positioned?

    <p>At angles other than 90°</p> Signup and view all the answers

    What is a defining characteristic of irregular astigmatism?

    <p>Principal meridians at non-90° angles</p> Signup and view all the answers

    How can irregular astigmatism be distinguished from regular astigmatism?

    <p>By the alignment of the two principal meridians</p> Signup and view all the answers

    What is the orientation relationship between the principal meridians in irregular astigmatism?

    <p>Non-orthogonal</p> Signup and view all the answers

    Why is irregular astigmatism sometimes referred to as Bi-Oblique astigmatism?

    <p>Because the principal meridians cross obliquely</p> Signup and view all the answers

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