A nurse is providing teaching to a group of clients about the changes that occur when clients experience cataracts. Which of the following statements should the nurse include in the teaching?
"Vision changes occur when pressure in the eye is increased due to a decrease of aqueous humor."
"Vision changes occur when blood vessels leak fluid or blood under a portion of the retina."
"Vision changes occur when the cloudy lens alters the passage of light through the eye."
"Vision changes occur when retinal tissue pulls away from the blood vessels in the eye."
The Correct Answer is C
A) "Vision changes occur when pressure in the eye is increased due to a decrease of aqueous humor." This statement describes a mechanism associated with glaucoma, not cataracts. In cataracts, vision changes occur due to the opacity or cloudiness of the lens, not changes in intraocular pressure.
B) "Vision changes occur when blood vessels leak fluid or blood under a portion of the retina." This statement describes a mechanism associated with retinal diseases like diabetic retinopathy, not cataracts. In cataracts, the lens becomes cloudy, affecting the passage of light through the eye.
C) "Vision changes occur when the cloudy lens alters the passage of light through the eye." This statement is correct. Cataracts cause the lens of the eye to become cloudy, which interferes with the passage of light through the eye. This results in vision changes such as blurred vision, glare, and difficulty seeing in low light conditions.
D) "Vision changes occur when retinal tissue pulls away from the blood vessels in the eye." This statement describes a mechanism associated with retinal detachment, not cataracts. In cataracts, the lens becomes opaque, but the retinal tissue remains intact.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. A decrease in systolic blood pressure greater than 10 mm Hg during inspiration: Pulsus paradoxus is an exaggerated decrease in systolic blood pressure during inspiration. Normally, there is a slight decrease in systolic blood pressure during inspiration due to increased intrathoracic pressure and decreased venous return to the heart. However, in conditions such as cardiac tamponade or severe asthma exacerbations, the decrease in systolic blood pressure during inspiration is more pronounced (>10 mm Hg), indicating impaired cardiac output and decreased left ventricular filling during inspiration.
B. A decrease in heart rate greater than 10/min when lying down: This finding is not indicative of pulsus paradoxus. Pulsus paradoxus primarily refers to changes in systolic blood pressure during inspiration rather than alterations in heart rate when lying down.
C. An increase in diastolic blood pressure greater than 10 mm Hg during inspiration: This finding is not indicative of pulsus paradoxus. Pulsus paradoxus is characterized by an exaggerated decrease in systolic blood pressure during inspiration, not changes in diastolic blood pressure.
D. An increase in heart rate greater than 20/min when standing: This finding is not indicative of pulsus paradoxus. Pulsus paradoxus primarily refers to changes in systolic blood pressure during inspiration rather than alterations in heart rate when standing.
Correct Answer is A
Explanation
A. Rheumatoid arthritis: Rheumatoid arthritis is an autoimmune condition characterized by chronic inflammation of the joints. Some research suggests a possible link between autoimmune disorders such as rheumatoid arthritis and Meniere's disease. Autoimmune conditions can affect the inner ear, leading to vestibular dysfunction and contributing to the development of Meniere's disease.
B. Bacterial pneumonia: Bacterial pneumonia is a respiratory infection caused by bacterial pathogens. There is no direct association between bacterial pneumonia and an increased risk of developing Meniere's disease. Meniere's disease primarily affects the inner ear and is not related to respiratory infections.
C. Macular degeneration: Macular degeneration is a degenerative eye disease that affects the central portion of the retina. There is no known association between macular degeneration and an increased risk of developing Meniere's disease. These conditions affect different parts of the body and are not related in terms of etiology or risk factors.
D. Osteoporosis: Osteoporosis is a condition characterized by loss of bone density, leading to an increased risk of fractures. There is no direct association between osteoporosis and an increased risk of developing Meniere's disease. These conditions affect different systems in the body and are not known to be related.
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