Hi, please consult Eye specialist to rule out nystagmus. Nystagmus i.e involuntary eye movements which can be caused by subsequent foveation of moving objects, pathology, sustained rotation or substance abuse.
“It is characterized by alternating smooth pursuit in one direction and saccadic movement in the other direction. The oscillations may occur in the vertical, horizontal or torsional planes, or in any combination”. Taken from website http://en.wikipedia.org/wiki/Nystagmus
Oh I forgot to put in that my eyes do tend to bounce up and down at times