AbstractThe pupillary light reflex (PLR) is a routinely utilized clinical test to quickly assess integrity of subcortical light perception pathways in patients. While interpretation is simple for ophthalmologists, interestingly discrepancy occurs in annotation of the test results, especially for the consensual response. An email survey sent to diplomates of either the American or European Colleges of Veterinary Ophthalmologists (ACVO and ECVO, respectively), requesting use of a ‘direct/consensual’ annotation convention, showed 58% of respondents preferred one convention while 39% preferred a different convention. The majority preferred convention was different between ACVO and ECVO respondents. Standardization of PLR annotation convention across specialists is recommended for clarity in medical record keeping and communication among colleagues.