ESSEN OF HUMAN ANAT & PHYS PKG OCC
ESSEN OF HUMAN ANAT & PHYS PKG OCC
4th Edition
ISBN: 9781323766910
Author: Marieb
Publisher: PEARSON C
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Chapter 8, Problem 7MC

Convergence

a. requires contraction of the medial rectus muscles of both eyes.

b. is needed for near vision.

c. involves transmission of impulses along the abducens nerves.

d. can promote eyestrain.

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Because fibers of the optic nerve that originate in the nasal halves of each retina cross over at the optic  chiasma, each lateral geniculate receives input from a.both the right and left sides of the visual field of both eyes. b.the ipsilateral visual field of both eyes. c.the contralateral visual field of both eyes. d.the ipsilateral field of one eye and the contralateral field of the other eye.
If someone is born with dense cataracts on both eyes, and the cataracts are removed years later, what happens?A. The person remains permanently blind.B. The person gradually recovers all aspects of vision.C. The person gains some vision, but remains impaired on object recognition, motion vision, and depth perception.D. The person gains almost all aspects of vision, but remains greatly impaired on color perception.
Paralysis of a medial rectus muscle would affect (a) accommodation,(b) refraction, (c) depth perception, (d) pupil constriction.

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ESSEN OF HUMAN ANAT & PHYS PKG OCC

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