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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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Presentation Transcript
slide1

h

iris

lens

pupil

cornea

Blind spot

muscle

Optic nerve

retina

slide2
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.
slide6
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.