You may have seen "floaters" in your vision, especially if you look at a blank wall or a bright blue sky. What are they? And should we be worried about them? What about visual snow, phosphenes, and the blue entoptic phenomenon? Although you may not recognize all the names, chances are you've seen most of these at some point—and now Inés Dawson will explain them in depth. Enjoy:

If you want more detail on this topic, or video isn't your thing, read this blog post by Dawson going into vastly more depth. For more videos from Dawson, check out her channel Draw Curiosity.