Lens
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lens PowerPoint PPT Presentation


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h. iris. lens. pupil. cornea. Blind spot. muscle. Optic nerve. retina. Iris. A colored circular muscle opens and closes, forming larger and smaller circles to control the amount of light getting into the eye. Pupil. The opening in the eye

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Lens

h

iris

lens

pupil

cornea

Blind spot

muscle

Optic nerve

retina


Lens

Iris

  • A colored circular muscle

  • opens and closes, forming larger and smaller circles to control the amount of light getting into the eye.


Pupil

Pupil

  • The opening in the eye

  • Changes the size as the iris muscles move to cover and uncover the lens.


Cornea

Cornea

  • The clear outer covering of the eye

  • behind which is a fluid


Muscle

Muscle

  • The muscles within the eye socket, comprising the 7 muscles.

  • It helps close and open the eye socket.


Lens

Lens

  • The part of the eye that focuses an object on the back of the eye.

  • The lens is a clear object


Retina

Retina

  • The back of the eye.

  • Contains millions of receptors for light.


Optic nerve

Optic Nerve

  • Where all the nerve cells leave the eye

  • It’s where all the nerves are tied together


Blind spot

Blind Spot

  • The portion of the retina through which the optic nerve exits and where there are no receptors for light waves.

  • You can not pick up light waves with the blind spot.


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