PUPILS PERRL stands for what?

• A. Pupils Equal, Round, Reactive to Light
• B. Pupils Equal, Round, Readable to Light
• C. Pupils Equal, Rectangular, Reactive to Light
• D. Pupils Equal, Round, Responsive to Light

Answer: (A)

PERRL is a quick check of the nervous system focused on the pupils. It stands for Pupils Equal, Round, Reactive to Light. Pupils Equal means the two pupils are the same size, which suggests symmetric cranial nerve function. Round describes the typical shape; irregular or unevenly shaped pupils can indicate trauma or disease. Reactive to Light means both pupils constrict when light is shined into the eyes, showing a normal reflex pathway from the eye to the brain and back out to the eye. This combo is a simple, rapid way to screen for potential head injury or neurological issues in the field. The other phrasing options use terms that aren’t standard or describe a different concept (Readable, rectangular, or Responsive instead of Reactive to Light), so they don’t convey the same clinical meaning.