I have a little black thing on the left side of my face that I see with my left eye, someone told me it was called a floater, I would like to see if it is anything to be concerned with? it looks like a cross between a Mosquito and a spider as I started to research the subject matter I seen that it could be serious, I just had some tests CT Scan, MRI, lots of blood drawn there may of been more tests that I can't name right now can you help with some information, do you think there is any need for more tests like a Cardiac Cathe, or anything else that would shine some light on this subject, do I need to fear a stroke?