Final answer:
A blown or dilated pupil resulting from lesions to cranial nerve III (oculomotor nerve) is indicative of a neurological problem. It can manifest in ocular symptoms such as double vision and drooping eyelid, as well as neurological symptoms like headache and weakness on one side of the body.
Step-by-step explanation:
The clinical significance of a blown or dilated pupil resulting from lesions to cranial nerve III (oculomotor nerve) is an indication of a neurological problem.
When the oculomotor nerve is damaged, the affected pupil fails to constrict or respond to light. This can manifest in ocular symptoms such as double vision, drooping eyelid, and difficulty moving the eye, as well as neurological symptoms including headache, nausea, and weakness on one side of the body.