I get rapid eye movement as soon as meditation starts I saw a question about rapid eye movement when meditating, which from what I know is similar to REM sleep and the experience I had is a little bit different. As the title says I get the eye movement with in a few seconds and the only difference is the top of both my eyes hurt a little and can be distracting sometimes. Is it good that I can get this so fast?  Does it mean some kind of raise in consciousness or even more concentration may come soon? 

I have only recently noticed this this week and I meditate about 20 minutes.
In short this can be due to:


past fabrications surfacing rapidly and creating uncommon experiences
perhaps less likely but a possibility is Piti which sometimes create vibrating and / or pulsating experiences


Also see: eye movement during meditation

These experiences are neither good nor bad. Also do not get attached or averse to them. In additions concentrate on the task at hand than giving importance and distracting your self when there experiences do arise in your meditation session.