Finally I've found people who seem to have a similar problem like me.
Basically, I started getting "eye shakes" about two years ago, at the age of 20, usually while sitting down at the computer or reading a book. (Especially reading from the computer). They last a variable number of minutes to seconds, and are in-frequent. First one occurred during a very stressful period at university when I was under immense pressure.
I'm usually reluctant to visit the doctor and so have not seen anyone about it.
I don't have epilepsy but I have a family history of it (cousin died from it my great grandfather)
I've had about four "attacks" in the past year, but they seem to be getting less severe (I've been taking omega-3 fish oil supplements - as I heard they are good for reducing epileptic fits) and it seems to have helped. I do tend to "feel" them coming on. Its a weird kind of spinning feeling plus my head seems strange. Come to think, I've not had my eyes shake at all since taking the oils, I just get the weird headache/feeling.
I wish everyone the best with their eye issues