A patient is unable to differentiate between sharp and dull stimulation to both sides of her face. What does the nurse suspect?

A. Macular degeneration: The loss of central vision while maintaining peripheral vision is characteristic of macular degeneration, a common age-related condition that affects the macula, the central part of the retina responsible for sharp and detailed vision. Patients with this condition often struggle with tasks that require fine visual acuity, such as reading or recognizing faces.

B. Increased intraocular pressure or glaucoma: Glaucoma typically causes peripheral vision loss rather than central vision loss. Patients may not notice changes in their vision until the disease has progressed significantly, making this option less likely given the patient's symptoms.

C. Vision that is normal for someone her age: While age-related changes in vision are common, the specific symptoms described—difficulty reading, sewing, and recognizing faces—indicate a significant problem rather than a normal aging process. Conditions like macular degeneration should be considered when central vision loss is present.

D. The beginning stages of cataract formation: Cataracts generally cause blurred vision, glare, and difficulty with night vision. They typically affect overall vision rather than causing specific central vision loss while preserving peripheral vision. Therefore, while cataracts are common in older adults, they do not align with the symptoms described in this case.

A. To facilitate the movement of air through the nares: While the ciliated mucous membrane does help in the overall functioning of the nasal passages, its primary role is not to facilitate air movement but to filter and trap particles.

B. To filter coarse particles from inhaled air: The primary purpose of the ciliated mucous membrane in the nose is to trap and filter out coarse particles, such as dust, pollen, and microbes, from inhaled air. The cilia beat in a coordinated manner to move mucus and trapped particles towards the throat, where they can be swallowed or expelled, helping to keep the airways clear and protect the respiratory system.

C. To filter out odors: While the nasal cavity does play a role in detecting odors through the olfactory receptors located in the upper part of the nasal cavity, the ciliated mucous membrane itself is not primarily responsible for filtering odors.

D. To warm the inhaled air: The nasal passages do help warm inhaled air as it passes through, but this is more a function of the rich blood supply and the large surface area of the nasal cavity rather than the role of the ciliated mucous membrane specifically. The primary action of the ciliated mucous membrane is focused on filtering particles from the air.