Oculomotor Nerve (CN III), Trochlear Nerve (CN IV), Abducens Nerve (CN VI)
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The Oculomotor nerve (CN III), Trochlear nerve and Abducens Nerve (CN VI) are involved in movements of the eye.
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Asking the patient to keep their head perfectly still directly in front of you, you should draw two large joining H’s in front of them using your finger and ask them to follow your finger with their eyes. It is important the patient does not move their head.
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Always ask if the patient experiences any double vision, and if so, when is it worse?
Abducens
As previously mentioned, the abducens nerve is tested in the same manner as the oculomotor and trochlear nerves, again in eye movements.
