1 Touch Response: The keys on a digital piano or keyboard can be weighted (similar to those of a traditional piano), touch sensitive (unweighted but still sound loud when struck hard), or neither.
In very rare instances, eyelid twitching can indicate a more serious condition, like the beginning stages of multiple sclerosis or a lesion on the brain stem. Those conditions typically begin with a host of symptoms, and in this circumstance the eyelid twitch soon moves to the facial muscles, as well.
Most eyelid spasms go away without treatment in a few days or weeks. If they donât go away, you can try to eliminate or decrease potential causes. The most common causes of eyelid twitch are stress, fatigue, and caffeine. To ease eye twitching, you might want to try the following: Drink less caffeine.