If you have ever had a migraine, you know that calling it a “bad headache” doesn’t come close to defining it. Migraines hit hard and last a long time–sometimes days. Accompanied often by nausea, dizziness, and sensitivity to light, they can be quite debilitating. An ocular migraine is a type of migraine that affects the function of the eyes, resulting in double vision, the presence of an aura or flashing lights. An ocular migraine is also called a visual, ophthalmic, monocular, or retinal migraine.

1. Symptoms

An ocular migraine can cause a change in vision, flashing lights or an aura that affects just one eye. In severe cases, temporary blindness can occur in one eye and last for up to an hour. It is often confused with the aura that occurs during some regular migraines but can be corroborated by covering one eye and noting whether the effect is present in one or both eyes.