Correct Answer: A

Rationale: The correct answer is A: otosclerosis. Otosclerosis is a condition where abnormal bone growth in the middle ear causes hearing loss. In this case, the patient's symptoms of progressive hearing loss improving with louder sounds suggest conductive hearing loss, which is commonly seen in otosclerosis. Other choices are incorrect because presbycusis is age-related hearing loss, trauma to the bones would typically result in sudden hearing loss, and frequent ear infections are more likely to cause temporary hearing loss rather than progressive loss.

Correct Answer: B

Rationale: The correct answer is B: assess for middle ear infection as a possible cause. Sensorineural hearing loss is usually caused by damage to the inner ear or the nerve pathway to the brain. Middle ear infection can sometimes lead to conductive hearing loss, but it's important to rule out this possibility during assessment. Speaking loudly (A) is not effective for sensorineural hearing loss. Asking about medications (C) may be relevant but not as crucial as assessing for a possible cause. Looking for external ear obstruction (D) is more relevant for conductive hearing loss, not sensorineural.

Correct Answer: B

Rationale: The correct answer is B: It is the most common type of glaucoma. Open-angle glaucoma is indeed the most common type, accounting for about 90% of all glaucoma cases. In open-angle glaucoma, the drainage angle of the eye remains open, but the trabecular meshwork becomes blocked over time. This leads to increased intraocular pressure, which can damage the optic nerve and result in vision loss. A, C, and D are incorrect: A: The symptoms mentioned (sensitivity to light, nausea, halos around lights) are more commonly associated with acute angle-closure glaucoma, not open-angle glaucoma. C: Immediate treatment is not necessarily needed for open-angle glaucoma as it progresses slowly, and treatment can vary based on the severity of the condition. D: Vision loss in open-angle glaucoma typically starts with the loss of peripheral vision, not central vision.

Correct Answer: C

Rationale: The correct answer is C: Hydrocephalus. The nurse suspects hydrocephalus due to the symptoms presented by the infant: enlarged cranium, small face, dilated scalp veins, and "setting sun" eyes. Hydrocephalus is the abnormal accumulation of cerebrospinal fluid in the brain, leading to increased intracranial pressure and characteristic physical signs such as an enlarged head. Craniotabes (A) is softening of the skull bones, not associated with these symptoms. Microcephaly (B) is characterized by a smaller head size, opposite to what is described in the question. Caput succedaneum (D) is swelling of the soft tissues of the infant's scalp, which is unrelated to the symptoms mentioned.

Correct Answer: A

Rationale: The correct answer is A: poor vision. In the 20/80 visual acuity notation, 20 represents the test distance in feet, and 80 represents the line on the eye chart that the patient can read. Therefore, a person with 20/80 vision can only see at 20 feet what a person with normal vision can see at 80 feet. This indicates poor vision as the patient's visual acuity is significantly below normal. Summary: - Choice B (acute vision) is incorrect as 20/80 vision indicates poor vision, not exceptional sharpness. - Choice C (normal vision) is incorrect as 20/80 vision is below normal range. - Choice D (presbyopia) is incorrect as presbyopia is a condition related to aging and difficulty focusing on close objects, not specifically indicated by 20/80 vision.