Ocular migraine is sometimes called retinal migraine. A retinal migraine is a rare condition with symptoms of repeated bouts of short-lasting, diminished eyesight or blindness. These visual disturbances occur with or without headache. Unlike aura migraines, retinal migraines will affect only one eye, not both. But the loss of vision in one eye may be caused by some other more serious condition. So if you experience vision loss in one eye, see a doctor right away for prompt treatment.