A client's chart indicates that they are legally blind. Which of the following is the definition of legally blind?
Full vision loss in at least one eye
The best-corrected vision in the better eye of 20/200 or less
Inability to see clearly from 200 feet away without corrective lenses
Bilateral visual impairment of 20/60 or greater
The Correct Answer is B
Choice A Reason: This is incorrect because full vision loss in one eye does not necessarily mean that the person is legally blind. Legal blindness depends on the visual acuity and visual field of both eyes.
Choice B Reason: This is correct because legal blindness is defined by the World Health Organization (WHO) as having a visual acuity of 20/200 or worse in the better eye with the best possible correction, such as glasses or contact lenses. This means that the person can see at 20 feet what a normal person can see at 200 feet.
Choice C Reason: This is incorrect because inability to see clearly from 200 feet away without corrective lenses may indicate nearsightedness or myopia, but not legal blindness. Nearsightedness can be corrected with lenses or surgery.
Choice D Reason: This is incorrect because bilateral visual impairment of 20/60 or greater does not meet the criteria for legal blindness. Visual impairment is defined by WHO as having a visual acuity of less than 20/60 but better than 20/200 in the better eye with the best possible correction.

Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
Choice A Reason: This is incorrect because a referral to a sleep study program is not the most appropriate plan of care for a blind client who has difficulty with sleep. A sleep study program is used to diagnose and treat sleep disorders such as sleep apnea, narcolepsy, or restless legs syndrome.
Choice B Reason: This is incorrect because assisting the client to see if a night shift job is available is not a helpful plan of care for a blind client who has difficulty with sleep. A night shift job can disrupt the circadian rhythm and worsen the sleep quality and quantity of the client.
Choice C Reason: This is incorrect because institution of opioids and sedatives is not a safe plan of care for a blind client who has difficulty with sleep. Opioids and sedatives can cause addiction, dependence, tolerance, and withdrawal symptoms. They can also impair the respiratory and cognitive functions of the client.
Choice D Reason: This is the correct choice because education about non-24 disorder is an essential plan of care for a blind client who has difficulty with sleep. Non-24 disorder is a condition where the internal clock of the body does not synchronize with the 24-hour day-night cycle. It can cause irregular sleep patterns, daytime fatigue, and mood disturbances. It is more common in blind people who lack light perception. The nurse should educate the client about the causes, symptoms, and treatments of non-24 disorder.
Correct Answer is C
Explanation
Choice A Reason: The test does not assess for sun protection factor, but rather for contact dermatitis. Sun protection factor is a measure of how well a sunscreen protects the skin from ultraviolet radiation, which can cause sunburn and skin damage.
Choice B Reason: The test is not inconclusive, but rather positive for some allergens and negative for others. The test involves applying small patches of different substances to the skin and observing for any reactions after 48 hours.
Choice C Reason: This is the correct choice. The presence of erythema indicates you are allergic to the allergen, as it shows inflammation and irritation of the skin due to an immune response. Erythema is redness of the skin that can be accompanied by itching, swelling, or blisters.
Choice D Reason: The areas that did not turn red do not indicate low risk for skin cancer, but rather no reaction to the allergen. Skin cancer is a malignant growth of abnormal cells in the skin that can be caused by various factors, such as genetic mutations, exposure to carcinogens, or immunosuppression.
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