Sight

In Glogpedia

by Hokeypokey
Last updated 5 years ago

Discipline:
Science
Subject:
Human Anatomy
Grade:
6

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Sight

HOW DO U SEE COLOUR?!

Eye Diagram!!!

The human eye belongs to a group of eyes found in nature called "camera-type eyes." Instead of film, the human eye focuses light onto a light sensitive membrane called the retina.

What Causes Cataracts?The eye lens much like a camera. Light rays enter the eye, passing through the cornea, the aqueous humor -- transparent fluid in the front of the eye -- and then the pupil and into the lens. The lens bends the light rays to focus objects onto the retina lining the back of the eye. From there, the image passes through the retinal cells, into the optic nerve, and finally to the back of the brain which process the images.Cataracts occur when there is a buildup of protein in the lens that makes it cloudy. This prevents light from passing clearly through the lens, causing some loss of vision. Since new lens cells form on the outside of the lens, all the older cells are compacted into the center of the lens resulting in the cataract.Define Aqueous: like water; watery

EYE CHART

PINKEYEViral pinkeye is often caused by an adenovirus, which is a common respiratory virus that can also cause a sore throat or upper respiratory infection. The herpes virus can also cause viral pinkeye.Symptoms of pinkeye include:Redness in the white of the eye.Swelling of the eyelids.Itching or burning feeling of the eyelids.Swollen and tender areas in front of the ears.A lot of tearing.Clear or slightly thick, whitish drainage.Viral pinkeye symptoms usually last 5 to 7 days but may last up to 3 weeks and can become ongoing or chronic.

A TYPE OF INFECTION

HOW PINKEYE HAPPENDSMost cases of pinkeye are caused by:* Infections caused by viruses or bacteria. * Dry eyes from lack of tears or exposure to wind and sun.* Allergies

BY: SARA HIGGINS

PINKEYE

Parts of your eye:• The iris (the pigmented part)• The cornea (a clear dome over the iris)• The pupil (the black circular opening in the iris that lets light in)• The sclera (the white part)• The conjunctiva (a thin layer of tissue covering the front of the eye, except the cornea)

SIGHT


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