The nurse is reviewing in age-related changes in the eye for a class. Which of these physiologic changes is responsible for presbyopia?
Decreased adaptation to darkness
Loss of lens elasticity
Decreased distance vision abilities
Degeneration of the cornea
The Correct Answer is B
A. Decreased adaptation to darkness: This change is related to decreased rod function but is not responsible for presbyopia.
B. Loss of lens elasticity: Correct. Presbyopia is caused by the age-related loss of elasticity in the lens, which reduces the ability to focus on near objects.
C. Decreased distance vision abilities: This may occur with other conditions like myopia but does not cause presbyopia.
D. Degeneration of the cornea: This can affect vision but is not responsible for presbyopia.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A. Pupillary dilation when looking at a far object: While dilation occurs with distance, the question specifically refers to near vision.
B. Pupillary constriction when looking at a near object: Accommodation is the process by which the eyes adjust to focus on near objects, which includes pupillary constriction and lens thickening.
C. Changes in peripheral vision: This describes visual field testing, not accommodation.
D. Involuntary blinking in bright light: This describes the corneal reflex, not accommodation.
Correct Answer is D
Explanation
A. Constipation: This involves hardened stool in the colon, causing localized distention but no free fluid.
B. Splenomegaly: Enlargement of the spleen causes a palpable mass in the left upper quadrant but no free fluid.
C. Distended bladder: This causes suprapubic distension but does not produce a fluid wave.
D. Ascites: A positive fluid wave test indicates free fluid in the abdominal cavity, a hallmark sign of ascites. The test is performed by tapping one side of the abdomen and observing for a wave-like transmission of fluid to the opposite side.
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