Seems like alot of the posts here refer to eyelid twitching/blinking. My problem is that since last Friday, my eyeball is twitching, so that if I focus on something, it is continually moving, but only in my left eye. By the end of the day my eye is very achy & all I want to do is shut mye eyes. As a photographer, this is quite a worry. Have others experienced this - is this fatigue based also?

Thanks,

Pete.