I posted a reply to a simaliar post, but I figure I would get better responses by creating a new thread..... Whenever I wake up I see and faint glowing spot in my center vision that quikly turns to a black spot. The spot sometimes will be animated, but not moving around in my field of vision, it is kind of pulsating and flickering. And if I look at the window when the sun is coming up, I can shut my eyes and see the image of the window, and that is normal..... but then, in my center vision, a white spot appears surrounded by a thin black ness, similiar to the image of a camera that has flashed in you eye, but not quite! I figured this was a form of retinopathy from staring a street light a few years back, but the doctors I have visited, said a street light cannot cause this, only the suns uv rays can do this, plus, I only see it in the morning. Also, I had a motor cycle crash about 7 years ago, and have since then been seeing a flashing yeallow spot in my center vision, it goes away only for a few seconds in which my vision is great, and then it comes back, in and out every few seconds. The doctors say my retina is fine and everything checks out good..... Does anyone have any ideas about either of this phenomenon??????
I've replied to other similar posts, so I don't think I can add anything new. These are just my opinions of course.
Do I understand you correctly when you say the black spot goes away during the day?
That's rather peculiar since the afterimage you get when you close your eyes in the morning shows that you have a real blind spot there.
Flashes and movements in this area are caused by the nerves sending signals to the brain. Since you have only one working eye, there could be an aspect of "phantom limb syndrome" as well. Miscellaneous nerve firings. The accident complicates things too, because the affected area could be in the brain and not the eye at all.
Please get the notion out of your head that staring at a streetlight caused any damage. It is simply impossible. It doesn't matter how long you stare at a streetlight, it does not have the brightness or type of wavelength that can burn the retina. Besides, if it did, it wouldn't take a month to show up.
I found your description of yellow and purple interesting, because I see the same thing. A mustard-yellow background, with lavender blobs or ribbons moving around on it. Now, I do have retinal damage, so my dancing blobs and blind spots have a cause, but it boils down to firing nerves sending messages to the visual cortex.
It would be a good idea for you to do what I advised somebody else recently, where a black spot is involved. Download an Amsler grid from the net and look at the centre of it in bright light. If any bits of lines are missing, you have a permanent blind spot (and more information to go on).
Moe, when you said the after image I see indicates a blind spot, is that the only thing it could be, or could there be other reasons? I heard someone mention something about Charles Bonet Syndrome.......... I took the Amsler Grid test, and everything thing was fine as far as the lines being straight, or etc.... but they did disapear with the onset of the flashing yeallow-purplish spot, but just as it fades away in looking at anything, the lines returned to normal in a matter of only a second or two. If this helps any, when I stared at the steet light, the colored rings around the light were there, but the strange thing is, I from that night, I saw those rings when I enter a dark room for around a month. And even still in low light, when I look at a pattern, I see a dull grashish, almost white spot in my central vision. But even the spot in the moring does not completly obstruct my central vision, it is translucent. I hope this helps to get a better idea of the spot/spots. Ohe yeah, I was lying on the floor at night, but I had the room lights on, it was bright in the room, and I had my baseball cap lying on my face, and I noticed whenever I would stare through the little air holes in the cap, I can see the black dot, and again, it is translucent.
You obviously do not have a permanent blind spot, which is good. What I meant about the afterimage was--for the blob to show up as an afterimage, it had to block out normal vision while your eye was open. That is, the spot registered on your retina, rather than the object you were looking at. But now I'm not clear as to whether the spot is there in the afterimage immediately, or if it gradually appears there? In other words, is the afterimage an EXACT replica of what you looked at until the spot shows up, or is the spot there blocking part of the afterimage immediately?
I've mentioned Charles Bonnet a few times. It's caused by neural activity in the brain when there is retinal damage, much like phantom limb pain. Since one of your eyes doesn't work, it's possible you could have this, but it usually causes intricate patterns and real pictures to appear, rather than a spot. It's pretty cool when you know what is happening. Also, the hallucinations come and go, and the pictures change.
Your symptoms are quite baffling. It's good the docs say your retina looks fine. Try not to worry too much, but be vigilant.
Moe, I am glad to hear I do not have a permenant blind spot. Ther image of the window is the same when I close my eyes just like I see it, it but only for a half second. If the window or whaatever it is I'm looking at is more bright, then sometimes I don't even see the spot at all. It must be something in my brain.........