Thank you for replying Uma - that was a very old thread of mine!
I like the first link and will be sure to strike up communication with the blue dot if ever it decides to hang around long enough. I do still get it occasionally, and not necessarily during meditation, but as Gem and Kaere say, it seems to come & go without any fanfare.
fire - I also get the white sparklies, especially if I look into the blue sky on a sunny day (but not at the sun!
)