After many years of curiosity, I have finally discovered that there is a name for something I've had for as long as I can remember: seeing afterimages a lot more easily and often than other people. It's called palinopsia, and it sounds like it's related to other, usually neurological, conditions. I have always been able to look at an object for less than a second, then look away and immediately see its afterimage. Bright lights have always bothered me because I see them for several minutes after the light is gone, and driving at night was always scary because of the headlights of the other cars. Having lived all my life with this, it has never bothered me, but I have always been curious as to why I was different from other people. I never mentioned it to a doctor because I was used to it and I've never seen it as a problem.
Now that I know what it is, I'm wondering if it could be related to any of my other health problems. Most of the problems it seems to usually be related to are life threatening and would have killed me by now or at least would have been noticeable much earlier, since I would have to have had the problem all my life. Anyway, I have a multitude of other health problems and symptoms, including asthma, low blood pressure, fainting, psychogenic non-epileptic seizures (but epilepsy wasn't completely ruled out), migraines, fibromyalgia symptoms, digestive symptoms mostly relieved by removing gluten, dairy, corn and soy, joint pain, easy bruising, muscle cramping (especially in my hands), recurrent tendinitis, joints that sprain easily, Raynaud's phenomenon (cold hands and feet that sometimes turn white and go numb), heart palpitations, daily headaches (not migraines), muscle twitches, extreme fatigue, difficulty sleeping, and probably several other things I'm forgetting right now...like brain fog. ;) I know this is an eye forum, but I also know that sometimes eye symptoms can lead people to a diagnosis when none of the other symptoms do. If nothing else, I'd love to know if there are other people out there like me with palinopsia.