Left eye-lid twitching for 3 weeks. Eye doctor confirmed healthy eyes with power change. Yet to buy glass. Twitching while rubbing and blinking fast?

Lid Myokymia. Twitching of the lid is usually associated with fatigue or dry eyes, but any irritation of the trigeminal nerve (CN 5) could cause a reflex contraction of the orbicularis oculi muscle (CN 7 - facial nerve) , resulting in a fasciculation of the lid. In most cases this is benign, and relieved with rest and artificial tears. See an ophthalmologist for an eye examination if persists with new glasses.