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The human eye pp1
The human eye pp1
The human eye pp1
The human eye pp1
The human eye pp1
The human eye pp1
The human eye pp1
The human eye pp1
The human eye pp1
The human eye pp1
The human eye pp1
The human eye pp1
The human eye pp1
The human eye pp1
The human eye pp1
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The human eye pp1

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For this assignment I made a powerpoint explaining the human eye and how it works.

For this assignment I made a powerpoint explaining the human eye and how it works.

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Transcript

  • 1. By: Emily Hundt
    The Human Eye
  • 2. Diagram of the human eye
    http://63.240.118.132/images/Senior%20Site/Section%201/eye-diagram.jpg
  • 3. Eye parts
    Iris
    Round, colored part of the eye ball
    Helps control the amount of light that enters the eye
    Lens
    Clear structure in the eye
    Focuses light rays to the retina
    http://www.medterms.com/script/main/art.asp?articlekey=4044
  • 4. Eye Parts
    Pupil
    Dark hole of the eye
    Controls how much light goes in the eye
    Retina
    Nerve layer
    Lines back of eye
    Creates urges that travel through the optic nerve to the brain
    http://www.medterms.com/script/main/art.asp?articlekey=4044
  • 5. Eye parts
    Cornea
    Clear outer layer of the eye
    Focuses light in the eye
    Optic Nerve
    The nerve that connects the eye to the brain
    Carries impulses formed by the retina to the visual cortex of the brain
    http://www.medterms.com/script/main/art.asp?articlekey=4044
  • 6. What is needed to see?
    If you guessed light, you are correct.
    The human eye can not see without some sort of light source.
  • 7. Are all parts of the eye important for seeing?
    The answer: Yes. Each part of the eye plays a different role, and each are equally important.
    For example: The optic nerve connects to the brain so you can remember things you see.
    The lens focuses the light rays to the retina.
    The pupil controls the amount of light that enters the eye.
    All are very important for seeing clearly.
  • 8. What does it mean to be blind?
    People who are blind can not see.
    Some blind people can see only shapes, bright lights, and dull lights.
    One is considered blind if their vision is no better than 20/200.
  • 9. What does it meanto be blindcontinued
    Some are born blind
    Some become blind
    Causes of blindness is if the optic nerve is not functioning or is damaged.
    When the cornea or the lens gets clouded over, it does not let light in. This also causes blindness.
  • 10. Rods and cones
    Both are parts of the retina
    Rods work in dim light
    Cones are used in bright light
    Both are used for seeing colors
  • 11. Cones
    Cones are sensitive to color
    They are less sensitive to light
    The cones are accountable for high resolution vision.
  • 12. Rods
    Not sensitive to color
    Responsible for dark-adapted vision
    Rods are good motion sensor.
  • 13. What is 20/20 vision?
    “Normal vision”
    Can see at twenty feet what most people can see at twenty feet
    Does not mean perfect vision, it only means the clarity of vision at a specific distance.
  • 14. Work citedPictures
    Slide 3-Lens picture-
    Slide 3-Iris picture-
    Slide 4-Pupil picture-
    Slide 4-Retina picture-
    Slide 5-Cornea picture-
    Slide 5-Optic Nerve picture-
    http://excelens.in/images/newsletter/newsletter_clip_image003.jpg
    http://fc02.deviantart.net/fs27/f/2008/042/0/0/Iris_Eye_Macro_Stock_by_zpyder.jpg
    http://www.atlanta2020.com/wp-content/uploads/2011/08/DilatedPupil.jpg
    http://www.topnews.in/healthcare/sites/default/files/retina.jpg
    http://www.rustoneyeinstitute.com/images_content/cornea.jpg
    http://www.daviddarling.info/images/optic_nerve.jpg
  • 15. Work CitedInformation
    Adler, Irving, and Ruth Adler. Your Eyes. New York:
    The John Day Company, 1962. Print.
    2. "Definition of Iris." MedicineNet.com. MedicineNet,
    2011. Web. 10 Oct 2011.
    <http://www.medterms.com/script/main/art.asp?art
    iclekey=4044>.
    "Visual Acuity: What is 20/20 Vision?." American
    Optometric Association . American Optometric
    Association, 2011. Web. 10 Oct 2011.
    <http://www.aoa.org/x4695.xml>.
    4. http://hyperphysics.phy-
    astr.gsu.edu/hbase/vision/rodcone.html#c4

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