Something odd...
Couple of days back I had to go get a Nuclear scan for a foot issue. Basically they inject a mildly radioactive substance and you come back later for a scan. The do a couple that are the nuclear scan then a CT scan - the nuclear gives them metabolic info and the CT nails the location.
So... while the nuclear scan is being done, I'm laying there with eyes closed (it's about 10 minutes each scan) and noticed a difference in my 'visual snow' effects.
It was more difficult than usual to notice the VS because the 'vortex' effect was so strong.
Normally I see a large slightly electric blue (like a pale blue spark colour in a circle but with bits 'spitting' out from it.Imagine a plate of some light blue glowing stuff that is sparking - you can't see the parks coming at you but the ones going sideways change the smooth circle into something more like a Sun.
The circle gets smaller and slightly brighter until it turns into a few bright spots and disappears, byut by that time the next 'vortex' is already there and getting smaller.
So, in the scan periods, the colour was much more vivid, closer to a blue LED light of blue. Got very bright as the circle got to the centre, but it wasn't really a circle. For the first time I can recall, the circle was heavily distorted, sometimes looking like something had taken bites out of it and sometimes kinda stretched and twisted. Also I had other smaller vortex-type effects out to the edges, sometimes top and outer eye, sometimes bottom and outer - the inner eye area was where the larger 'blobs' were.
It didn't happen for the CT scan, only the nuclear, so it wasn't the radio-dye stuff.
I asked about the scan and she said the nuclear one was passive - it was more like a photograph in that it picks up the radioactive emissions rather than sending any kind of beam at the site.
I've always thought more information would help me work out just what gives with my visions (& Dr Katz's) effects, but this is just more confusing...