The client having the intraocular pressure measured asks the nurse why this is necessary every year. What is the nurse's best response?
A. "Elevated eye pressure can cause high blood pressure."
B. "If eye pressure is too high, your eyes will bulge forward enough that your lids can't cover them and they will dry out."
C. "Elevated eye pressure can press on blood vessels in the eye, keeping eye nerves from getting enough oxygen, which will lead to blindness."
D. "Increased eye pressure causes the tear ducts to become blocked so that you have insufficient tears. It is the tears that protect the cornea from abrasions."
C
Intraocular pressure is the pressure generated by the fluids inside the globe of the eye. As intra-ocular pressure increases above normal, it compresses the blood vessels and the optic nerves. As the blood vessels are compressed, oxygenation to the internal eye structures, including the nerves and photoreceptors, is diminished. The nerves and photoreceptors require a constant supply of oxygen and will die if blood flow is inadequate, leading to blindness.
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