What are objects floating like worms in human eyes?

Have you ever seen something floating in your vision? It is like a worm or it can also be a transparent water. But strangely, you keep trying to see more clearly, it disappears and when you look away, it appears.

1. What is the world in the eyes of young children under one year old?
2. The reason why the eyes wake up every morning and full of rust will surely surprise you
3. In the future, these excess body parts may completely disappear due to evolution

Don't worry, they're not a living organism or an eye defect, but a piece of tissue, red blood cells or protein clusters in the eyeball. When we look at the sky, floating objects appear to be a very normal thing that everyone faces.