Migraine
Some who suffer from migraines see a visual aura or a fortification syndrome. It is similar to floaters but appears as a blurry or rainbow-colored small spot that later expands and covers half or most of the field of vision. For example, the spot may expand into a letter C or sickle shape with zigzag patterns. In some cases, visual auras appear as flashes of light or a frosted glass-like image that affects only a part of the visual field.
Migraine visual auras can last for ten to thirty minutes. Around 20% of those who suffer from migraines see this aura. Some who do not have a history of migraine or are unaware that they have this condition occasionally encounter this visual aura. They may not feel any headache but experience some lightheadedness and eye strain. Visual auras usually happen before a migraine attack, but they may also appear during an attack.
There are no treatments for the vision blurring brought about by visual auras. However, it is temporary and goes away in less than an hour. Addressing it is treating the migraine itself. Some can sleep through it, but others may find it difficult to nap.
