Hello Pharmgirlkelly and welcome to NeuroTalk.
MS is a disease of the Central Nervous System(CNS) which includes the brain, spinal cord and optic nerves. Lesions (scaring) can show up anywhere within the CNS.
MRIs of the brain and spinal cord are best when a person is suspected of having MS. A spinal cord lesion can cause symptoms from that point down.
Yes you can have symptoms on both sides at the same time.
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eye symptoms (weird lights for about 20 minutes in one eye) several years ago.
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Visual disturbances that last only 20 to 30 minutes are usually caused by migraines. Visual disturbances can be part of an Ocular migraine.
http://www.allaboutvision.com/condit...r-migraine.htm