A client's canal of Schlemm in the right eye is believed to be blocked. The nurse recognizes that the canal of Schlemm is an important structure because it:
1. supports the retina in place.
2. assists the iris in controlling the size of the pupil.
3. produces tears that help lubricate the eye.
4. provides a means for drainage of aqueous humor.
Correct Answer: 4
Rationale 1: The vitreous humor is the gel-like substance that helps to maintain the shape of the eyeball and keeps the retina in place.
Rationale 2: The smooth muscle fibers of the iris change the diameter of the pupil.
Rationale 3: The lacrimal apparatus produces tears and helps to protect the eye.
Rationale 4: The canal of Schlemm is an opening in the trabecular meshwork or spongy connective tissue that drains the aqueous humor from the anterior chamber into the venous system.
Global Rationale: The canal of Schlemm is an opening in the trabecular meshwork or spongy connective tissue that drains the aqueous humor from the anterior chamber into the venous system. The vitreous humor is the gel-like substance that helps to maintain the shape of the eyeball and keeps the retina in place. The smooth muscle fibers of the iris change the diameter of the pupil. The lacrimal apparatus produces tears and helps to protect the eye.
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