Jarvis Physical Examination and Health Assessment 9th Edition Test Bank Related

Review Jarvis Physical Examination and Health Assessment 9th Edition Test Bank related questions and content

A light is pointed at a patient's pupil, which contracts. It is also noted that the other pupil contracts as well, though it is not exposed to bright light. Which of the following terms describes this latter phenomenon?

  • A. Direct reaction
  • B. Consensual reaction
  • C. Near reaction
  • D. Accommodation
Correct Answer: B

Rationale: The correct term for the phenomenon described is "Consensual reaction" (Choice B). This occurs because the optic nerves from both eyes are connected, causing stimulation of one eye to result in a simultaneous response in the other eye due to the consensual pupillary reflex. The other choices are incorrect because:
A: Direct reaction refers to the pupil directly exposed to light contracting.
C: Near reaction refers to the pupillary response when focusing on a near object.
D: Accommodation refers to the ability of the eye to adjust focus for near and far objects, not pupil constriction.