As intracranial pressure rises, the pupil of the eye, ipsilateral to the lesion, becomes dilated and unresponsive to light because of pressure on the:

Question

Quizplus · Accepted Answer

The dilation and unresponsiveness of the pupil occur due to pressure on the parasympathetic fibers of cranial nerve III (oculomotor nerve), which are responsible for constricting the pupil. As intracranial pressure increases, these fibers are compressed, leading to pupil dilation.

As Intracranial Pressure Rises, the Pupil of the Eye, Ipsilateral