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?

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.

Choice A reason: This is the correct answer because the Amsler grid test is performed to diagnose macular degeneration. The Amsler grid is a pattern of straight lines with a dot in the center. The client is asked to look at the dot and report any distortions or missing areas in the grid. This can indicate damage to the macula, which is the central part of the retina that provides sharp vision.

Choice B reason: This is incorrect because the Snellen chart test is not performed to diagnose macular degeneration. The Snellen chart is a chart of letters of different sizes that are read from a distance. The client is asked to read the smallest line they can see clearly. This can indicate visual acuity or sharpness of vision, but not macular degeneration.

Choice C reason: This is incorrect because the intraocular pressure test is not performed to diagnose macular degeneration. The intraocular pressure test measures the pressure inside the eye using a device called a tonometer. The client may feel a puff of air or a gentle touch on their eye. This can indicate glaucoma, which is a condition where increased pressure damages the optic nerve, but not macular degeneration.

Choice D reason: This is incorrect because the refraction test is not performed to diagnose macular degeneration. The refraction test measures how well the eye bends light rays using a device called a phoropter. The client looks through different lenses and reports which ones make their vision clearer. This can indicate refractive errors such as nearsightedness, farsightedness, or astigmatism, but not macular degeneration.