Aura_ss Visual disturbances are most commonly associated with migraine headache. These symptoms can also be related to local eye conditions, such as glaucoma, which can produce a halo effect around objects. Visual disturbances may be warning signs of a stroke, and are termed "transient ischemic attacks." Although these ischemic attacks more commonly occur in older individuals, they can be confused with migraine-related disorders. In migraine, visual disturbances can occur before or during the headache. They may be related to the headache itself, in which case the occurrence of blurred vision and increased headache related to light, or photophobia, are most common.