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The Human Eye

The Human Eye. By: Stephanie M. Faura. This is how an eye looks like when your looking at a person. This is the parts of the eye. The Eye. The eye is used for many things. Many people don’t know the wonders of the eye or how facinating it really is. Ligh t. Light is a kind of energy

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The Human Eye

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  1. The Human Eye By: Stephanie M. Faura

  2. This is how an eye looks like when your looking at a person This is the parts of the eye

  3. The Eye • The eye is used for many things. Many people don’t know the wonders of the eye or how facinating it really is.

  4. Light • Light is a kind of energy • Travels 186,000 miles per second • The light that you see from the sun was light that the sun gave out 8 minutes ago • When light travels between two places it travels in waves of energy • Light (waves) behave in four ways reflection, refraction, diffraction, and interference • ChristiaanHuygens (1629–1695) said that light was waves • Sir Isaac Newton (1642–1727) thought that light was a stream of particles

  5. These are Sun rays

  6. Cornea • The outer layer of the eye • Clear and Transparent • Provides about 70% of the eye's refractive power • Contains no blood vessels, damaging the cornea can be very painful • Has five layers: the epithelium, Bowman's membrane, the stroma, Descement's membrane, and endothelium

  7. Pupil • The pupil is a hole in the center of the iris • Where the lens is

  8. Lens • Transparent tissue • The lens is behind the pupil • Lens help to focus images on • the retina • Lens can change shape by • bending to focus on light

  9. Iris • The iris is the colored part of the eye just behind the cornea • Colors can vary between people • What is really fascinating about the iris is that it is like a fingerprint • The iris pattern is different for every person • Not even twins have a same looking iris The iris

  10. Vitreous humor • Gel-like substance • Between the lens and the retina • Also keeps the shape of the eye. Vitreous Humor

  11. Retina • Thin layer of tissue that contains nerve cells • Cells are responsive to light • In the back portion of the eye

  12. Rod Cells • They able to make you see black and white • Don’t see color • React to low light levels

  13. Cone Cells • Used for seeing color in bright conditions

  14. Bipolar cells • Graduated potentials is a signal that passes threw the bipolar cell to get to the ganglion cells • Bipolar cells are connected to horizontal cell

  15. Ganglion cells • Connected to the Bipolar cells

  16. Axons • Part of the neuron that transmits nervous impulses • Thickness of axons varies • Thick axons carry nerve impulses more quickly • Covered with a thick layer of the cell's fatty membrane

  17. Dendrites • Branch-like structures on neurons • Detect chemical signals

  18. Optic Nerve • Collects nerve impulses • Carries them to the brain • Interprets them as an image

  19. Urlsfor pictures • http://en.wikipedia.org/wiki/Eye • http://jsuniltutorial.weebly.com/the-human-eye-and-the-colourful-world.html • http://srxawordonhealth.com/2013/01/ • http://deskarati.com/2010/10/14/what-are-crepuscular-rays/ • http://www.stlukeseye.com/anatomy/pupil.html • http://www.classichousewife.com/2013/05/07/home-dissection-science-tools-review/ • http://www.dailymail.co.uk/sciencetech/article-2246888/The-eyes-The-iris-pictured-remarkable-incredible-close-shots.html • http://toadhaven.com/Toadhaven/Dissection.html • http://www.easynotecards.com/print_list/29843 • http://medical-dictionary.thefreedictionary.com/dendrite • http://www.georgiavisioncare.com/services_glaucoma_ophthalmologists.htm

  20. Recorces • http://webpath.follettsoftware.com/resource/viewurl?encodedUrl=fwOzSY0hxFtQpQi_F8kSfBerL-u6EwFwLNhdxAWvZ5w&version=1&appsignature=Destiny&appversion=12.0.6.2+%2812_0_AU2_RC2%29 • http://webpath.follettsoftware.com/resource/viewurl?encodedUrl=ckNX_h27bCFPSuZnn2QXdEpsP-uiSEFKB23kmGHFZRk&version=1&appsignature=Destiny&appversion=12.0.6.2+%2812_0_AU2_RC2%29 • http://ic.galegroup.com/ic/scic/ReferenceDetailsPage/ReferenceDetailsWindow?failOverType=&query=&prodId=SCIC&windowstate=normal&contentModules=&display-query=&mode=view&displayGroupName=Reference&limiter=&u=theparksch&currPage=&disableHighlighting=false&displayGroups=&sortBy=&source=&search_within_results=&p=SCIC&action=e&catId=&activityType=&scanId=&documentId=GALE|KDGLSU867104724 • http://webpath.follettsoftware.com/resource/viewurl?encodedUrl=plo2j1Ikxcj5uQozTp-kxRdoZY2O3Hq5UJCUu6hpiSc&version=1&appsignature=Destiny&appversion=12.0.6.2+%2812_0_AU2_RC2%29 • http://ic.galegroup.com/ic/scic/ReferenceDetailsPage/ReferenceDetailsWindow?failOverType=&query=&prodId=SCIC&windowstate=normal&contentModules=&display-query=&mode=view&displayGroupName=Reference&limiter=&u=theparksch&currPage=&disableHighlighting=false&displayGroups=&sortBy=&source=&search_within_results=&p=SCIC&action=e&catId=&activityType=&scanId=&documentId=GALE|GYDGGW095268854

  21. Recorces 2 • http://webpath.follettsoftware.com/resource/viewurl?encodedUrl=fwOzSY0hxFtQpQi_F8kSfIezj2YJ55uU9Om00Xyq_y8&version=1&appsignature=Destiny&appversion=12.0.6.2+%2812_0_AU2_RC2%29

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