Amy went in for her annual eye exam. Her eye doctor told her she needed further testing. He wanted to do extraocular muscle tests on her before he gave her a new prescription for glasses
a. What are these studies and what do they show?
Students' answers should include the following:
a.
• Corneal light reflex test—assesses the alignment of the eyes
• If the light is uneven, it may be due to muscle weakness or paralysis.
• Cover–uncover test—assesses the extraocular muscle function
• If there is any movement, it may indicate muscle weakness.
• Positions test—tests cardinal position of gaze to assess muscle strength and cranial nerve function
• If asymmetrical, it may indicate weakness in extraocular muscles or dysfunction of the cranial nerve that innervates that muscle.
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