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The sudden onset of flashing lights, a noticeable increase in the amount of floaters, a shadow in your peripheral vision, or a gray curtain moving across your field of vision could be signs of a detachment of the retina â the nerve layer in the back of the eye that sends images to the brain.
Almost all sudden-onset eyelid twitching is benign, meaning the condition is not serious or a sign of a medical problem. However, this kind of eye twitching also can be hard to treat. The only option for making the twitching stop may be to figure out the cause and deal with it.ye strain: Vision-related stress can occur if, for instance, you need glasses or a change of glasses. Your eyes may be working too hard, triggering eyelid twitching. Computer eye strain from overuse of computers, tablets and smartphones is also a very common cause of vision-related stress.