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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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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 • Changes the size as the iris muscles move to cover and uncover the lens.
Cornea • The clear outer covering of the eye • behind which is a fluid
Muscle • The muscles within the eye socket, comprising the 7 muscles. • It helps close and open the eye socket.
Lens • The part of the eye that focuses an object on the back of the eye. • The lens is a clear object
Retina • The back of the eye. • Contains millions of receptors for light.
Optic Nerve • Where all the nerve cells leave the eye • It’s where all the nerves are tied together
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.