From what you described, the one thing that comes to mind is a vitreous floater. They are quite common and look like a little dark or cloudy spot that moves around in your vision but only is seen in certain situations, certain lighting conditions and certain background conditions. It can be a bothersome symptom and it comes and goes. Floaters can sometimes be a sign of degeneration of the vitreous gel, a detachment of the vitreous gel, detachment of the retina, and or bleeding from the retina into the vitreous. It can be just a normal part of aging (most commonly) or a sign of a serious retinal condition, so you really need to see an ophthalmologist to make sure your eyes are healthy.
MJK MD
Dear newportmom,
I would recommend that you seek the care of a neuro-ophthalmologist to determine whether the symptoms are of concern.
Dr. Feldman
Sandy T. Feldman, M.D., M.S.
ClearView Eye and Laser Medical Center
San Diego, California