The description 'Pupils are equal, round, and reactive to light' is an example of which assessment?

• A. Pupillary assessment
• B. Vital sign assessment
• C. Respiratory assessment
• D. Movement assessment

Answer: (A)

Assessing pupil response is a pupillary assessment. Checking that the pupils are equal, round, and reactive to light quickly gauges basic neurological function, specifically the pathways that control eye constriction (the optic nerve sensing light and the oculomotor nerve triggering constriction). When pupils are equal and round and respond to a light cue, it suggests normal-brainstem function at that moment. This quick check is a standard part of a neurological screen used in wilderness first aid to spot potential brain injury or changes in mental status.

This differs from a vital signs check, which focuses on heart rate, blood pressure, respiration, and temperature; from a respiratory assessment, which centers on breathing; or from a movement assessment, which evaluates motor function. In practice, you may hear the shorthand PERRL—Pupils Equal, Round, React to Light—as a concise way to describe this observation.