Hi, i am new to this forum and i just want to bring up an issue which has been playing on my mind lately. Whenever i stare or sometimes look at my teacher's face and immediately glance towards the wall i get a after image of there face which vanishes when i blink or look away. This only happens when i make try to get the after image but it has scared me as i have never heard of anyone getting after images like i am. I have had my eyes checked and they are fine and i am getting a CT scan tomorrow morning to make sure it isn't a neurological issue. I do have anxiety and could this be the reason why i am getting after images like that? I am really worried as i mentioned and it will be great if i could get a reply, thank you.