The assessment of pupil reactivity involves using a penlight or similar tool to shine light into each eye and observing the response. The pupils should constrict (become smaller) when exposed to light and dilate (become larger) when the light is removed. The findings are then recorded using a scoring system, typically ranging from 0 to 2 for each eye:
0: No reactivity 1: Sluggish or delayed reactivity 2: Normal reactivity
