There are various causes for eye twitching or spasm. The type of work you do is important. If you use the computer a lot, eye muscle fatigue sets in. Any vitamin B complex deficiency causes a similar complaint. Have you refractive error checked to see if you need glasses or a change of prescription. Use a cold compress over the area a few times a day. As long as the twitching is restricted to the eye area and does not involve other areas you may try the above and it should resolve in a few days.