Final answer:
Cranial nerve VI palsy would result in internuclear ophthalmoplegia, causing an inability to move the eyes laterally together, leading to double or blurred vision. This is due to damage to the abducens nerve that affects the lateral rectus muscle responsible for lateral eye movement.
Step-by-step explanation:
Cranial nerve VI palsy would result in a specific type of eye movement deficit known as an internuclear ophthalmoplegia. This is a deficit of conjugate lateral gaze, which means the eyes don't move together in the same direction when looking horizontally. Specifically, the lateral rectus muscle of one eye does not contract appropriately due to damage to the abducens nerve or the Medial Longitudinal Fasciculus (MLF) that is involved in coordinating eye movements. This condition leads to symptoms such as double or blurred vision and can impact the patient's ability to see objects to their right and left.
The abducens nerve, also known as the sixth cranial nerve, is responsible for the contraction of the lateral rectus muscle, which moves the eye laterally. Therefore, a palsy of the abducens nerve would create difficulties in the lateral movement of the eye on the affected side, leading to double vision or difficulty with eye coordination when looking to the side. The examination for such palsies involves checking for the range of motion of the eyes and the strength of the muscles involved. Internuclear ophthalmoplegia is different from conditions that may affect other elements of the visual system or other cranial nerves involved in eye movements, such as the optic nerve or the facial nerve.