Understanding Eye Defects and Corrections
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Questions and Answers

What is the main cause of myopia?

  • The eye's refractive power being too strong or the eyeball being too long (correct)
  • The shape of the cornea
  • The lens
  • The sensibility of receptors

    • What type of corrective lenses are needed for hypermetropia?

  • Bifocal lenses
  • Concave lenses
  • Prism lenses
  • Convex lenses (correct)

    • Which eye condition results in light rays being focused behind the retina?

  • Astigmatism
  • Myopia
  • Hypermetropia (correct)
  • Presbyopia

    • What is the common issue associated with astigmatism?

    <p>Blurry or distorted vision</p> Signup and view all the answers

    At what age does presbyopia typically start affecting individuals?

    <p>Around age 40-45</p> Signup and view all the answers

    What is Daltonism also known as?

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

    What is the main cause of myopia?

    <p>Weakness in the eye's refractive power</p> Signup and view all the answers

    Why does hypermetropia result in a confused image?

    <p>The eye's refractive power is too weak</p> Signup and view all the answers

    What is the primary reason for needing convex corrective lenses in hypermetropia?

    <p>To focus on close objects</p> Signup and view all the answers

    How does astigmatism affect vision?

    <p>It makes close objects seem blurry</p> Signup and view all the answers

    What is the typical age range at which individuals start experiencing presbyopia?

    <p>Around age 45</p> Signup and view all the answers

    What is the common term used for color blindness in some individuals?

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

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