Yes, it is possible.......And other medical ailments also.
As said, I posted numerous medical journal links, etc. on this.....Over a year ago, they are on another orb topic.....
What it means: An ocular migraine (also called an "ophthalmic migraine," "optical migraine," or "migraine aura") produces this disturbed vision, with or without an accompanying headache. Changes in blood flow to the brain are thought to be the cause.
More clues: The visual distortion starts in the center of the field of vision. It might appear as a bright dot, dots, or a line that can seem to move and disrupt your ability to see properly, as if you were looking through a pocked or cracked window. It's painless and causes no lasting damage. Individuals seem to have different triggers (ranging from chocolate, caffeine, and alcohol to stress). A headache, possibly severe enough to cause nausea, sometimes follows.
What to do: If you're driving, pull over until the phenomenon passes (usually within an hour). Do have an eye specialist check it out if vision impairment lasts more than an hour or so, to rule out serious problems such as a retinal tear; or if you also experience other symptoms elsewhere that could indicate stroke or seizure (such as fever, loss of muscle strength, or speech impairment).
Edited by Sakari, 24 April 2012 - 11:08 PM.