The EyeThe Eye

Parts of the Eye:Parts of the Eye:

CCorneaornea IIrisris PPupilupil LLensens RRetinaetina

CorneaCornea- the outer, transparent - the outer, transparent dome-like structure that transmits dome-like structure that transmits and refracts light to the pupil.and refracts light to the pupil.

* It is the outside coating that * It is the outside coating that protects against dust, eyelashes protects against dust, eyelashes etc.*etc.*

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Cat Cornea

IrisIris- a colored muscle that controls the - a colored muscle that controls the amount of light that enters the eye by amount of light that enters the eye by expanding (opens) and contracting (closes)expanding (opens) and contracting (closes)

In dark areas it opens wide and closes in In dark areas it opens wide and closes in brightly lit areas.brightly lit areas.

PupilPupil– the opening of the Iris that lets – the opening of the Iris that lets light into the inner parts of the eye.light into the inner parts of the eye.

Open=DilateOpen=Dilate Close=ConstrictClose=Constrict

hole

Lens- Lens- refracts light rays into your refracts light rays into your eye and focuses them on your eye and focuses them on your retina.retina.

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RetinaRetina– Located on the back of the inside of Located on the back of the inside of

the eye. It sends signals to the brain the eye. It sends signals to the brain through nerves so we can see an through nerves so we can see an image.image.

Draw and Label the Draw and Label the EyeEye Using a sheet of notebook paper, Using a sheet of notebook paper,

draw draw the eye.the eye. Using the diagram on the screen or Using the diagram on the screen or

in your book in your book pg.519 pg.519 You must You must make it colorfulmake it colorful and and label label

the partsthe parts we have learned about. we have learned about. Beside the part Beside the part define its function.define its function.

Turn in to tray.Turn in to tray.

TOTD: Identify the starred parts of the diagram and define.