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Section 12.3
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1
What is an objective lens?
A)It is the lens in a telescope through which the observer views the object.
B)It is the lens through which light leaves a telescope.
C)It is the lens through which light enters a telescope.
D)It is the lens through which light enters and exits a telescope.
2
What is the name of a transparent, curved structure in the front of the eye that refracts light as it enters the eye?
A)cornea
B)retina
C)pupil
D)optic nerve
3
Which part of the eye is made of a layer of rod and cone cells that responds to light and initiates nerve impulses?
A)iris
B)cornea
C)optic nerve
D)retina
4
Which statement about myopia is true?
A)It refers to far-sightedness.
B)It is the condition in which the eye cannot focus on nearby objects.
C)The condition is caused by an eyeball that is too short.
D)Myopia can be corrected with the use of diverging lenses.
5
Which statement about hyperopia is true?
A)It refers to near-sightedness.
B)It refers to the eyes not being able to focus on distant objects.
C)Hyperopia can be corrected with the use of converging lenses.
D)The condition is caused by the eyeball being too long.
6
What is astigmatism?
A)It is a condition in which the lens of the eye becomes stiff and the ciliary muscles can no longer make the lenses change shape.
B)It refers to vision being blurred or distorted because of an incorrectly shaped cornea.
C)It refers to far-sightedness and the condition in which the eye cannot focus on nearby objects.
D)It refers to near-sightedness and the condition in which the eye cannot focus on far- away objects.





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