The Human Eye Overview
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Questions and Answers

What is the function of the iris in the human eye?

  • To identify objects by their smell
  • To form an image on the retina
  • To control the size of the pupil (correct)
  • To enable us to see colors
  • What is the role of the cornea in the human eye?

  • To enable us to identify colors
  • To control the size of the pupil
  • To form an image on the retina
  • To let light enter the eye (correct)
  • How does the human eye function in comparison to a camera?

  • It identifies objects by their smell
  • It provides adjustment of focal length required to focus objects
  • It forms an image on a light-sensitive screen called the retina (correct)
  • It controls the size of the pupil
  • Which sense organ is considered the most significant, according to the text?

    <p>The human eye</p> Signup and view all the answers

    What is the main function of the crystalline lens in the human eye?

    <p>To provide finer adjustment of focal length required to focus objects on the retina</p> Signup and view all the answers

    What enables us to see the wonderful world and colors around us, according to the text?

    <p>The human eye</p> Signup and view all the answers

    What is the membrane called that has an enormous number of light-sensitive cells?

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

    What is the process called by which the brain interprets the electrical signals sent via optic nerves?

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

    What enables us to see distant objects clearly?

    <p>Relaxation of ciliary muscles</p> Signup and view all the answers

    What is the minimum distance at which objects can be seen most distinctly without strain called?

    <p>Least distance of distinct vision</p> Signup and view all the answers

    What is the condition called when the crystalline lens of old individuals becomes milky and cloudy?

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

    Which refractive defect is also known as near-sightedness?

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

    What can correct the refractive defect of myopia or near-sightedness?

    <p>Suitable spherical lenses</p> Signup and view all the answers

    What is the condition called when the eye gradually loses its power of accommodation?

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

    For a normal adult with normal vision, what is the farthest point upto which the eye can see objects clearly called?

    <p>&quot;Far point&quot; of the eye</p> Signup and view all the answers

    What can cause partial or complete loss of vision due to a milky and cloudy crystalline lens in old individuals?

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

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