By the end of this topic, you will be able to explain the mechanism of pupillary light reflex.
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Topics:
0:00 | Start
0:48 | How do we see?
1:48 | Neurological examination of pupils
3:05 | Interpreting pupillary response
4:00 | abnormal pupillary reflex
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Describe the different pathologies associated with abnormal pupillary light reflexes. Review the management considerations for patients with pathological pupillary light reflex abnormalities. Explain the potential clinical impact that the early detection of an abnormal pupillary light reflex can have on a patient, and how the systematic approach could help evaluate and treat patients with abnormal pupillary reflexes to improve outcomes.

In the critical care unit, Pupillary light reflex is used to assess brainstem function. Abnormal pupillary light reflex can be found in optic nerve injury, oculomotor nerve damage, brain stem lesions, such as tumors, and medications like barbiturates.

The room lights should be dim, barely allowing you to see the iris and pupil. Keep the transilluminator ready and prepare the patient emotionally by explaining what are you going to do and what are the intended benefits of this test. Encourage patients to relax and alleviate their anxiety, if any.