The twitching of the eye is also called myokymia. This is an involuntary eyelid muscle contraction that usually affects the lower eyelid. The exact cause of this is still unknown. This twitch sometimes develops during times of increased stress. It is also associated with high caffeine intake, too much fatigue or excessive squinting. This can also happen when the person is reading too much or working in front of a computer for long duration of hours.

This eyelid twitch is also a sign that you need to take a break and relax from time to time. This twitch will go away on its own after a good night's rest but there are also stubborn twitches that may last as long as three weeks.

If there are twitching on both eyes, it is possible that a person has blehphorospasm. This is a chronic condition that is common in women after age of 50. It can also progress into repeated forceful closing of the eyes. There is no definite cause for this but this become worsens when there is stress, bright lights, watching too much TV, and fatigue.

You can relieve this by applying warm compress to the twitching eyes and gently massaging the eyelid with fingers. But for twitches that last longer than 2-3 days, an over the counter oral or topical eye drops which are also antihistamines can offer relief.

Movements around the eyes are oftentimes associated with tics or twitches, that may cause spasms in certain muscle groups. Motor tics often occur within the face, particularly around the eyelids, although they can affect any part of the body. Some of these tics and twitches can be temporary, but others could be initiated by a tic disorder that typically requires some form of treatment or changes in the lifestyle. Tics are classified as a movement that is repetitive and followed by a number of repeated occurrences of the same action, such as blinking of the eyes, shrugging of the shoulders, twitching of the eyes or nose. Tics can also include vocalizations charaterized by repetitively uttered sounds. Tics are often caused by stress or lack of sleep. While tics are not involuntary movements, they can be suppressed for some time, but most individuals with this affliction eventually give in to perform the tic due to growing discomfort if they fail to do so. Twitches, on the other hand, are isolated and not repetitive actions. They cannot be controlled, as tics can, and are thus involuntary movements. Twitching of the eyelid is a common type of twitch that could be attributed to the misfiring of certain cells within the brain. Like tics, twitches can be caused by stress and lack of sleep, as well as dry eyes, uncomfortable light conditions, or excess caffeine intake.

I had a frustrating twitch a couple of months ago that started to bother me after a couple of hours, so I did some research on it. In general, yes, twitches can sometimes be caused by stress. Basically, when humans had to watch out for predators in the wild, stress would cause their muscles to go on "high alert", so to speak. Muscles that are more ready for action are also more prone to twitch. The article said that, if anything, it is more normal for you to have occasional muscle twitches than for you *not* to have occasional muscle twitches. Everyone goes through high stress periods in modern day life, so it makes sense to me.

I've done a bit of searching and I can't seem to find the article I was reading though, so it might be best to consider my post more anecdotal than 100% guaranteed factual.

The twitch around our eyes is caused by fatigue and can come from too much stress. So the way to prevent it is to relax and rest.

One of the common reasons of muscle twitch is the amount of stress and anxiety. which is also known as benign fasciculation syndrome.Benign can mean the muscle twitch isn't really serious. Fasciculation is the medical term for muscle twitching. Syndrome means that typically, a lot of muscle twitching is also accompanied by muscle cramps, muscle aches and some tingling. Other causes could be :

Lack of sleep and fatigue
Dehydration
Muscular dystrophy
Multiple sclerosis
Weak Muscles

Source : http://www.whatcauses.net/what-causes-muscle-twitching.html