As a skincare expert, I can provide some insights on the topic. Eye twitching, also known as eyelid myokymia, can have various causes, including stress, fatigue, caffeine consumption, and eye strain. While lash serums are generally safe to use, some individuals may experience eye twitching as a rare side effect. However, it's important to note that this reaction is not common and may vary from person to person. If you are experiencing persistent eye twitching or any other discomfort, it's best to consult with a healthcare professional or ophthalmologist to determine the underlying cause and seek appropriate treatment or advice.