Which visual defect is not related to ocular migraines?

In the context of ocular migraines, visual disturbances typically include phenomena such as wavy lines, spots of light, and zigzagging lights. These symptoms arise due to temporary changes in the visual cortex or the retinal pathways, which can lead to distortions in vision.

Increased pupil size, or mydriasis, is not a symptom associated with ocular migraines. While mydriasis can occur due to various factors, including the influence of certain medications or nervous system reactions, it does not relate directly to the typical visual distortions caused by an ocular migraine. This indicates that while visual disturbances are a hallmark of ocular migraines, changes in pupil size reflect different physiological processes that are not specifically connected to the migraine's visual symptoms. Thus, recognizing the difference between visual symptoms and unrelated physiological changes is crucial in understanding the nature of ocular migraines.