Ever get one of those wiggly, transparent lines in your eyes and wonder “what’s going on here?” Well, I did the other day ― ...

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Floaters” are bits of cellular debris in the vitreous humor, which is the gel-filled space in between the lens and the retina.

They are the spots that most people occasionally see before their eyes. The authors propose that floaters are usually diffraction patterns cast on the retina by red blood cells ...