A nurse in an ophthalmology clinic is interviewing a client who was referred by his primary care provider for suspicion of cataracts. Which of the following findings is consistent with manifestations of cataracts?
Loss of peripheral vision
A decreased ability to perceive colors
Loss of central vision
Seeing bright flashes of light and floaters
The Correct Answer is B
Choice A reason: This is incorrect because loss of peripheral vision is not a manifestation of cataracts, but of glaucoma. Glaucoma is a condition that causes increased pressure inside the eye and damage to the optic nerve, which can lead to loss of vision in the outer edges of the visual field. The nurse should assess the client's intraocular pressure and visual field test results to rule out glaucoma.
Choice B reason: This is correct because a decreased ability to perceive colors is a manifestation of cataracts. Cataracts are a condition that causes clouding or opacity of the lens, which is the transparent structure behind the pupil that focuses light onto the retina. Cataracts can reduce the clarity and contrast of vision and make colors appear faded or yellowish. The nurse should ask the client about any changes in color perception or brightness of objects.
Choice C reason: This is incorrect because loss of central vision is not a manifestation of cataracts but of macular degeneration. 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. The nurse should assess the client's visual acuity and fundoscopic examination results to rule out macular degeneration.
Choice D reason: This is incorrect because seeing bright flashes of light and floaters is not a manifestation of cataracts but of retinal detachment. Retinal detachment is a condition that occurs when the retina, which is the layer of tissue at the back of the eye that converts light into nerve impulses, separates from its underlying support tissue. Retinal detachment can cause sudden flashes of light, floaters, or shadows in the visual field. The nurse should refer the client to an ophthalmologist immediately if retinal detachment is suspected.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
Choice A Reason: This is the correct choice. Using the rule of nines, each arm accounts for 9 percent of TBSA, each leg accounts for 18 percent of TBSA, and front and back are equally divided. Therefore, burns on both sides of both arms and legs equal to (9 + 9) x 2 + (18 + 18) x 2 = 36 percent of TBSA.
Choice B Reason: This choice is incorrect. Using the rule of nines, burns on both sides of both arms and legs equal to 36 percent of TBSA, not 54 percent. To get 54 percent of TBSA, one would have to add burns on both sides of head and neck (9 percent), chest (9 percent), and abdomen (9 percent).
Choice C Reason: This choice is incorrect. Using the rule of nines, burns on both sides of both arms and legs equal to 36 percent of TBSA, not 27 percent. To get 27 percent of TBSA, one would have to subtract burns on both sides of one leg (18 percent).
Choice D Reason: This choice is incorrect. Using the rule of nines, burns on both sides of both arms and legs equal to 36 percent of TBSA, not 18 percent. To get 18 percent of TBSA, one would have to divide burns on both sides of both arms and legs by two.
Choice E Reason: This choice is incorrect. Using the rule of nines, burns on both sides of both arms and legs equal to 36 percent of TBSA, not 9 percent. To get 9 percent of TBSA, one would have to divide burns on both sides of both arms and legs by four.
Correct Answer is D
Explanation
Choice A Reason: Culture is not a diagnostic test that uses an ultraviolet light source, but a laboratory test that involves growing microorganisms from a sample of body fluid or tissue. Culture can help identify the type and sensitivity of the infection-causing agent.
Choice B Reason: KOH is not a diagnostic test that uses an ultraviolet light source, but a chemical test that involves applying potassium hydroxide to a sample of skin, hair, or nail. KOH can help diagnose fungal infections by dissolving the keratin and revealing the fungal elements under a microscope.
Choice C Reason: Diascopy is not a diagnostic test that uses an ultraviolet light source, but a physical test that involves applying pressure to a lesion with a glass slide or lens. Diascopy can help differentiate between blanchable and non-blanchable lesions, such as erythema or petechiae.
Choice D Reason: Wood's is a diagnostic test that uses an ultraviolet light source, also known as a Wood's lamp or black light. Wood's can help observe color changes to the skin that are not visible under normal light, such as fluorescence or hypopigmentation. Wood's can help diagnose conditions such as tinea capitis, vitiligo, or erythrasma.
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