Recently I felt that one of my eyes cannot see things clearly, I’m quite worried about it. Sometimes my vision becomes blurred suddenly, I can’t tell why. And I’m wondering that whether it’s all because of my new eyeglasses, whether it doesn’t suit me well. Besides I didn’t get hurt recently, so how could that happen?

You may get astigmatism. The symptom of it is the blurring of one’s vision. And I suggest that you go to your ophthalmologist to let her/him have examination on you.