Eye

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## Contents

* 1 The eye and It's function
* 2 Facts about the eye
* 3 Funtions
* 4 Maintaining It's eyes
* 5 Structure

## The eye and It's function

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Your eyes are the sensory organs that allow you to see. Your eyes capture visible light from the world around you and turn it into a form your brain uses to create your sense of vision. Your brain doesn’t have sensory abilities of its own. It needs your eyes (and other senses, like hearing and touch)

## Facts about the eye

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* Eyes are able to process 36,000 pieces of information in a single hour.

* The human eye only sees three colors: red, blue and green.

* Most Vision Problems are Curable or Avoidable

* Eyes are Our Second Most Complex Organ

## Funtions

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Everything your eyes do starts with light from the outside world. Your eye structure lets light enter and pass through a series of clear components and sections, including the cornea, aqueous humor, lens and vitreous humor. Those structures bend and focus light, adjusting how far the light beams travel before they come into focus. When light lands on the cells of your retinas, those cells send signals to your brain. The signals are like coded messages describing everything they can about the light. That includes the color, how intense it is and any other relevant details. Your brain decodes and processes the signals and uses them to “build” the image you see.

## Maintaining It's eyes

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Eat healthy foods. Be sure to have plenty of dark, leafy greens like spinach, kale, and collard greens. Eating fish that are high in omega-3 fatty acids — like salmon, tuna, and halibut — is good for your eyes, too. Get active. Being physically active helps you stay healthy. It can also lower your risk of health conditions that can cause eye health or vision problems — like diabetes, high blood pressure, and high cholesterol. Quit smoking. Smoking isn’t just bad for your lungs — it can hurt your eyes, too! Smoking increases your risk of diseases like macular degeneration and cataracts

## Structure

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The eye sits in a protective bony socket called the orbit. Six extraocular muscles in the orbit are attached to the eye. These muscles move the eye up and down, side to side, and rotate the eye. The extraocular muscles are attached to the white part of the eye called the sclera. This is a strong layer of tissue that covers nearly the entire surface of the eyeball. The surface of the eye and the inner surface of the eyelids are covered with a clear membrane called the conjunctiva.Tears lubricate the eye and are made up of three layers. These three layers together are called the tear film. The mucous layer is made by the conjunctiva. The watery part of the tears is made by the lacrimal gland. The eye’s lacrimal gland sits under the outside edge of the eyebrow (away from the nose) in the orbit. The meibomian gland makes the oil that becomes another part of the tear film. Tears drain from the eye through the tear duct.