Eyelid Twitching

I still have no idea what caused my right eyelid to twitch last night... According to some medical explanation, it's due to stress, coffee, lack of sleep, staring at the computer screen for too long, etc...

What I wanna know is the superstitious side of it... I'm sure there is... Right eyelid twitching means a different thing from the left... What I don't know is, which side is good and which side is bad... Haha... But so far, nothing bad has happened... So it must be good... I hope... Haha... It's not like i'm waiting for anything bad to happen anyway... Neither am i a superstitious person... Just curious about this stuff only...