Yes, astigmatism will cause eye twitching because of the easy infection to the eyes. You should use the eye drops with anti-inflammation to get rid of the coming invisible bacterium. You could also use the warm compress to make the eyes feel comfortable. You should not use the computer for a long time with little rest which may worsen your eyes twitching problems.
Well, in my opinion, astigmatism cannot cause eye twitching, so you do not need to worry about it too much. First, according to some experts, astigmatism is a kind of visual condition which is related to its shape. And then, because of it, it can result in an eye that has two different powers. In that condition, blurry vision can occur, and it can be the most common symptom of astigmatism. For other symptoms, you should know that shadow images, eye muscle spasms, eyestrain, and headaches can be possible too. For the treatments, you can wear contact lenses to correct it. So you can have a try.