By: Stephanie M. Faura

THE HUMAN EYE

This is how an eye looks like when your looking at a person

This is the parts ofthe eye

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

THE EYE

• 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• Christiaan Huygens (1629–1695) said that light was

waves• Sir Isaac Newton (1642–1727) thought that light was a

stream of particles

LIGHT

These are Sun rays

• 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

CORNEA

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

PUPIL

• 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

LENS

• 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

IRIS

The iris

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

VITREOUS HUMOR

Vitreous Humor

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

RETINA

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

ROD CELLS

• Used for seeing color in bright conditions

CONE 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

BIPOLAR CELLS

• Connected to the Bipolar cells

GANGLION CELLS

• 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

AXONS

• Branch-like structures on neurons• Detect chemical signals

DENDRITES

• Collects nerve impulses • Carries them to the brain• Interprets them as an image

OPTIC NERVE

• 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

URLS FOR PICTURES

• http://webpath.follettsoftware.com/resource/viewurl?encodedUrl=fwOzSY0hxFtQpQi_F8kSfBerL-u6EwFwLNhdxAWvZ5w&version=1&appsignature=Destiny&appversion=12.0.6.2+%2812_0_AU2_RC2%29

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RECORCES

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RECORCES 2