The Human Eye By Kaitlyn Ferguson

Parts of the Eye

The Sclera is the outer, white layer of the eyeball. The sclera forms the supporting wall of the eye.

Your sclera can become inflamed, this is called Scleritis.

The optic nerve starts at the back of your eye and travels to your brain. this nerve sends signals to your brain.

Inflammation can occur in the optic nerve and spinal cord, causing Optic Neuritis.

Light enters through your eye through the cornea. The cornea is a transparent surface which protects your eye and helps focus light rays.

Your cornea can get Keratitis. This happens when bacteria is introduced to the eye. It's most commonly experienced by contact lens wearers, for if not cleaned properly they can bring bacteria into your eye.

The aqueous Humor is a clear fluid that fills the space between the lens and the cornea. It helps give the eye its shape and keep it functioning properly

Your eye can develop glaucoma. This is when the liquid produced by the aqueous humor builds up and causes pressure within the eye.

The vitreous humor is a jelly-like liquid tissue that fills the eyeball beyond the lens. It helps protect the eyeball.

The vitreous can experience Vitreous Detachment. With age, the vitreous humor becomes less of a jelly and more of a liquid, which causes it to move around. This can lead to it detaching from the retina.

The iris is a colored circle behind the cornea. It holds the pupil which opens and closes in order to take in light.

The iris can have Iritis, which is the inflammation of the iris. This can cause a number of things such as headache and blurry vision.

The ciliary muscle is the part of the eye that connects the iris to the choroid. The ciliary muscles help change the lens shape which effects light.

The ciliary muscle can develop cycloplegia, which results in the lens no longer being able to adjust to focus on nearby objects.

The retina is a layer of cells that lines the inside of the eye. This is where an image is formed.

The retina can experience retinal detachment which is when the retina is pulled away from the back of the eye

Rods and Cones are cells that allow you to see light, pigments, and colors. They can see red light, blue light, and green light.

Your rods and cones can develop Rod-Cone Dystrophy, which can impair hearing and vision.

Location

Rods and cones are located in the retina

Bibliography

"Optic Neuritis." Mayo Clinic. Mayo Foundation for Medical Education and Research, 04 Nov. 2016. Web. 04 May 2017.

Eye Diseases - Glaucoma. N.p., n.d. Web. 04 May 2017.

www.medicinenet.com+›+home+›+eyesight+center+›+eyesight+a-z+list+›+scleritis+index.

Credits:

Created with images by Conal Gallagher - "Eye" • Pexels - "blur close-up eye" • stokes91 - "eye" • hatcher10027 - "Tacking on the Styx - http://bookstore.authorhouse.com" • wwarby - "Eye" • hansvandenberg30 - "eye" • KirstentheBorg - "eye eyeball close-up" • hansvandenberg30 - "eye" • mustetahra - "My eye" • sweetron1982 - "swirl my eye" • wwarby - "Eye"

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