Correct Answer: A

Rationale: The correct answer is A: allergies. The symptoms described such as chronic watery eyes, sneezing, and clear nasal drainage are classic signs of allergies. The presence of a transverse line across the bridge of the nose, dark blue shadows under the eyes, and a double crease on the lower eyelids are typical physical exam findings in children with allergic rhinitis. These signs are known as Dennie-Morgan lines, allergic shiners, and allergic crease respectively. Allergies are the most likely cause based on the symptoms and physical exam findings. Sinus infection (choice B) typically presents with purulent nasal discharge and facial pain. Nasal congestion (choice C) usually involves nasal stuffiness and may not present with the specific eye findings mentioned. An upper respiratory infection (choice D) may present with fever, cough, and nasal discharge, but the eye findings described are not characteristic of an upper respiratory infection.

Correct Answer: B

Rationale: The correct answer is B: shadow or diminished vision in one quadrant or one half of the visual field. Retinal detachment can cause a shadow or reduced vision specifically in one quadrant or one half of the visual field due to the detachment of the sensory retina from the underlying retinal pigment epithelium. This occurs because the detached retina disrupts the normal function of the photoreceptor cells leading to visual disturbances in that specific area. A: Loss of central vision is not a typical sign of retinal detachment, as it usually affects peripheral vision initially. C: Loss of peripheral vision can occur in retinal detachment, but it is not a defining characteristic as the detachment typically affects a specific quadrant or half of the visual field. D: Sudden loss of pupillary constriction and accommodation is not directly related to retinal detachment but may be seen in other eye conditions like acute angle-closure glaucoma.

Correct Answer: D

Rationale: The correct answer is D because the description of a red-purple, maculopapular, blotchy rash behind the ears and on the face is characteristic of a condition called Koplik spots, which are associated with measles. Measles is a highly contagious viral infection that presents with symptoms such as cough, runny nose, high fever, and a widespread rash. The presence of Koplik spots in the mouth is a classic early sign of measles. Choices A, B, and C are incorrect because they do not align with the specific description of the patient's mouth spots or other expected signs of measles. It's essential for the nurse to recognize the unique features of Koplik spots to promptly identify and manage measles infection.

Correct Answer: D

Rationale: The correct answer is D because intraocular pressure is primarily determined by the amount of aqueous humor produced and the resistance to its outflow at the angle of the anterior chamber. When there is an imbalance in the production and outflow of aqueous humor, it can lead to an increase in intraocular pressure, which can result in conditions like glaucoma. Choices A, B, and C are incorrect because they do not directly influence intraocular pressure. The thickness or bulging of the lens (A) is related to accommodation for near vision, the posterior chamber accommodating fluid (B) is not a primary factor in determining intraocular pressure, and the contraction of the ciliary body (C) affects the shape of the lens for focusing rather than intraocular pressure regulation.

Correct Answer: C

Rationale: The correct answer is C because it demonstrates cultural sensitivity and respect for the patient's comfort. Placing the nurse's thumbs on either side of the trachea and tilting the patient's head forward is a non-threatening and non-invasive approach to examining the thyroid. This position allows the nurse to assess the thyroid gland without causing discomfort or intimidation to the patient. Choice A is incorrect because having the nurse's hands placed firmly around the neck from behind may be perceived as invasive and threatening to the patient. Choice B is incorrect because having the nurse's thumbs on the patient's neck with eyes averted toward the ceiling may come across as awkward and unprofessional. Choice D is incorrect because tilting the patient's head backward can cause discomfort and may not be culturally sensitive as it can be perceived as invasive.