Visual Snow

I too get this, mainly when trying to sleep, mostly when dark. I also get like swirling patterns or shapes of light when I shut my eyes, if I get the visual snow if they are open.

When that happens I know for the life of me I won't be getting to sleep. I don't know what to call it to Google it though!

It sometimes triggers migraines too
 
Get it when I strain myself. Must be something to do with pressure in blood vessels of the eyes. Had a serious bout of severe constipation a couple of years ago and nearly every mega-log resulted in that when it was finally pushed out. Actually gave myself two black eyes once from straining -- vessels in the soft tissue around the eyelids burst! WHAAAAAAT!
 
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