Prior to valve surgery, I experienced absolutely NO ocular migraines, double vision, or anything else of note, other than the typical age-related presbyopia (I'm told that this means "old eyes." When I developed that condition, I needed reading glasses -- at age 19). After surgery, I have the occasional ocular migraine, with no pain, just sparkles. More often, though, I have short-duration double vision. Mine lasts from 10-15 seconds to maybe a minute or so, not long enough to be much of a problem. I find that sometimes I can relieve the double vision by focusing my eyes on something in the middle or far distance, which makes me think mine is somehow related to my eye muscles either cramping or something like that. Sometimes closing my eyes helps, but not while driving. . .