Weird blurry effect in viewport and also in camera view when playback

After finishing a cycle when I play the playback there is some kind of blurry effect that I noticed. I thought at fist that it was something with the noise texture that I put on the character’s hair. But after putting a simple color, the blurry effect was still there.
Does this blurry effect will be there when I will render it? What should I do if so? Please need help