A nurse is caring for a client who reports a decrease in central vision. The nurse should identify that this is a manifestation of which of the following visual impairments?
Macular degeneration
Glaucoma
Diabetic retinopathy
Cataract
The Correct Answer is A
Choice A Reason: This is correct because macular degeneration is a condition that affects the macula, which is the central part of the retina that is responsible for sharp and detailed vision. Macular degeneration can cause blurred or distorted central vision, difficulty reading or recognizing faces, or dark spots in the visual field.
Choice B Reason: This is incorrect because glaucoma is a condition that affects the optic nerve, which is the nerve that connects the eye to the brain and carries visual signals. Glaucoma can cause increased pressure inside the eye, damage to the optic nerve, and loss of peripheral vision.
Choice C Reason: This is incorrect because diabetic retinopathy is a condition that affects the blood vessels in the retina, which is the layer of tissue at the back of the eye that converts light into nerve impulses. Diabetic retinopathy can cause bleeding, swelling, or leakage of fluid in the retina, and loss of vision in any part of the visual field.
Choice D Reason: This is incorrect because cataract is a condition that affects the lens, which is the transparent structure behind the pupil that focuses light onto the retina. Cataract can cause clouding or opacity of the lens, and reduced vision in all parts of the visual field.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
Choice A reason: This is incorrect because slow cautious behaviors are more consistent with a stroke involving the right hemisphere. The right hemisphere controls spatial awareness, creativity, and intuition. A stroke affecting this hemisphere can cause impulsivity, poor judgment, and denial of deficits.
Choice B reason: This is incorrect because loss of depth perception is more consistent with a stroke involving
the right hemisphere. The right hemisphere controls visual-spatial perception, which includes depth perception, distance estimation, and object recognition. A stroke affecting this hemisphere can cause difficulty in navigating space, judging distances, and identifying objects.
Choice C reason: This is incorrect because the overestimation of abilities is more consistent with a stroke involving
the right hemisphere. The right hemisphere controls emotional regulation, self-awareness, and insight. A stroke affecting this hemisphere can cause euphoria, lack of insight, and unrealistic expectations.
Choice D reason: This is the correct answer because hemianopsia is consistent with a stroke involving
the left hemisphere. The left hemisphere controls language, logic, and analysis. A stroke affecting this hemisphere can cause hemianopsia, which is the loss of vision in half of the visual field. This can affect reading, writing, and communication skills.
Correct Answer is D
Explanation
Choice A Reason: This is incorrect because nystagmus is not a response to stimuli, but a condition that causes involuntary eye movements. Nystagmus can be caused by various factors, such as inner ear disorders, brain lesions, or drug toxicity, but not necessarily by cervical spine injury.
Choice B Reason: This is incorrect because decorticate positioning is a response to stimuli that indicates damage to the cerebral cortex or the corticospinal tract. Decorticate positioning is characterized by flexion of the arms and extension of the legs. It does not indicate cervical spine injury, which affects the spinal cord below the brainstem.
Choice C Reason: This is incorrect because lack of any response to stimuli can indicate various levels of brain damage or coma, but not specifically cervical spine injury. Lack of any response can also be influenced by other factors, such as sedation, hypothermia, or shock.
Choice D Reason: This is correct because decerebrate positioning is a response to stimuli that indicates damage to the brainstem or the upper cervical spine. Decerebrate positioning is characterized by extension and outward rotation of the arms and legs. It indicates a severe and life-threatening injury that can impair vital functions, such as breathing and blood pressure.
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