I see a couple variations in a couple different books with these, but I am listing these as they are in the Stedman’s Medical Abbreviations, Acronyms & Symbols (fourth edition).
As easy as these might seem, these acronyms can still be a little tricky:
PERL – pupils equal and reactive to light
PERLA, PEARLA – pupils equal and reactive to light and accommodation
PERRL – pupils equal, round, reactive to light
PERRLA – pupils equal, round, reactive to light and accommodation
PERRRLA – pupils equal, round, regular, reactive to light and accommodation
Hope that gives you a cheat sheet reference to go by.