Eye focus twitches slightly when switching gaze horizontally -- ideas?

Do you ever feel off balance? Stand with your feet together and close your eyes then shake your head from side to side like you would while editing. Do you feel like you'll fall over? It's a sign of vertigo. Nystagmus (the eye thing) is related to vertigo, which is related to an inner ear problem. What happens when you go from a sitting to laying position? Have you had an ear infection recently? You should see your doctor. Vertigo can be helped with physical therapy, but you'll want to find out what's causing it or it wont get better, IF that's what you have.