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    Ati Lpn Polizzoti Med Surg Proctored Exam

    A nurse is collecting data from a client experiencing a change in vision. Which of the following statements indicates that the client might be developing cataracts?

    Explanation & Rationale

    Choice A rationale The inability to see objects from the sides of the eyes describes a loss of peripheral vision, which is a classic clinical manifestation of glaucoma. In glaucoma, increased intraocular pressure causes progressive damage to the optic nerve fibers, typically starting with those responsible for peripheral fields. Cataracts involve the central lens and do not specifically target peripheral vision in this manner; instead, they create a generalized clouding that affects the entire visual field. Choice B rationale Difficulty seeing objects in the middle part of the visual field indicates a central scotoma, which is the primary characteristic of macular degeneration. The macula is the central portion of the retina responsible for sharp, detailed vision. When it deteriorates, central vision is lost while peripheral vision remains intact. Cataracts do not cause a localized central void; they cause a diffuse opacification of the lens, leading to an overall reduction in clarity. Choice C rationale Dark spots moving around in the visual field are known as floaters, which are often caused by vitreous humor changes or retinal detachment. These occur when shadows are cast on the retina by debris within the vitreous gel. While people with cataracts might see shadows if the opacity is dense, floaters are not a primary diagnostic sign of cataract development. They are more indicative of posterior segment issues rather than lens opacification. Choice D rationale Cataracts are characterized by the progressive clouding of the crystalline lens, which scatters light as it enters the eye. This results in blurry, hazy, or dim vision because the light cannot focus sharply on the retina. The denaturation of lens proteins creates an opaque barrier, making it feel as if the client is looking through a frosted window. This generalized blurriness and increased sensitivity to glare are the most common early reports of cataract formation.

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