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Iris
Test your knowledge of the iris. Taken from Dr. Remington's Clinical Anatomy and Physiology of the Visual System 3rd Edition.
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Last updated: January 14, 2013
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First submitted
January 14, 2013
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Answer
The most anterior layer of the iris is the anterior border layer. Inner to this layer is what?
Iris stroma
The anterior border layer is absent in oval shaped holes throughout the iris called what?
Iris crypts
One type of pigmented cell in the iris is the melanocyte, what is the other?
Clump Cell
The incomplete circular blood vessel found in the iris stroma inferior to the collarette is what?
Minor circle of the iris
Mydriasis is caused by activation of which autonomic nervous system?
Sympathetic
Hint
Answer
Which layer of the iris forms the pupillary ruff?
Posterior epithelium
A posterior synechia causes pupillary block and bowing outward of the iris. What is this outward bowing called?
Iris bombe
Name given to irides of different color in the same individual.
Heterochromia
The insertion point of the dilator muscle is what?
Sphincter muscle
This thin part of the iris is most susceptible to tearing in blunt trauma (as in iridodialysis).
Iris root
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