When I went into my grades screen this morning, one of the columns for a quiz that is currently open had an icon that I haven't seen before and that wasn't there yesterday. It is a red eye with a slash through it. I can't figure out why it is there. One student has already taken the quiz... I'm just not sure why this icon is present and if it means I have done something wrong - which is always a possibility. Thank you for any information you may have.