Bizarre visual phenomenon
May 11, 2009 9:54 AM Subscribe
Occasionally, I experience a strange visual phenomenon that resembles a vortex of some sort...
posted by Acey to Grab Bag (12 answers total) 3 users marked this as a favorite
... I distinctly remember experiencing it aged 14, and it repeatly resurfaces. It is very real, and to me suggests an illusion of depth, like a bubbly vortex or portal in the centre of my vision, moving in on itself and lasting for several minutes. I can't be the first to experience this apparently harmless apparition. So what is it?