Ever get one of those wiggly, transparent lines in your eyes and wonder “what’s going on here?” Well, I did the other day ― and I’m choosing to inflict the horror of what I learned on all of you, too. According to the NHS, floaters are very common and are usually safe. They can take the form of small, dark dots, rings, cobweb-like structures, and squiggles. But as for why they happen,the NHS site adds: “They’re usually caused by a harmless process called posterior vitreous detachment (PVD), where the gel inside your eyes changes.”What’s that?!The National Eye Insitute says it often has to do with ageing. More specifically, Moorfields Eye Hospital says, “The hollow space in the middle of your eyeball is filled by a clear, jelly-like substance called the vitreous