Hello,
I'm new here. I came to this site from a link at a panic attack website. I've had the sparkly vision problem before. My eye doctor told me it is an ocular migraine. I get them when I'm feeling stressed or after I've had a panic attack. It was pretty freaky the first few times. It always started out as one sparkly strand across my vision and I could still see it when I closed my eyes and within an hour it would cover almost my entire vision. I could see normal things around it, but for the most part it would cover my vision.
I'd never heard of it before and no one I know has ever experienced it before. It's nice to hear that it is at least semi-common.
Airy