How are the results of the indirect PLR commonly designated?

The results of the indirect pupillary light reflex (PLR) are commonly designated after the illuminated pupil. This designation refers to the physiological response observed in the opposite eye when light is directed into one eye. When light shines into a single eye, both pupils typically constrict, an effect known as consensual reflex. Therefore, when assessing the results of the indirect PLR, it will be described in terms of the reaction of the pupil that is not directly illuminated, which indicates the functioning of the optic nerve and the pathways involved in the reflex.

This designation is crucial for evaluating neurological function in canines, as it provides insight into the integrity of the visual system and can help diagnose potential issues in the eye or the neural pathways. Other options do not relate to the results of the indirect PLR; for instance, vascular injection does not pertain to pupillary responses, eye color does not affect PLR outcomes, and age may influence physiology but is not a naming convention for reflex responses.