Hutchinson’s Pupil

Hutchinson’s Pupil

Hutchinson’s pupil is unilateral pupillary dilatation ipsilateral to a supratentorial (usually extrinsic) space-occupying lesion, which may be the earliest sign of raised intracranial pressure. It reflects involvement of peripheral pupilloconstrictor fibers in the oculomotor (III) nerve, perhaps due to compression on the margin of the tentorium.

Cross References

Anisocoria; Mydriasis; Oculomotor (III) nerve palsy