Generally, it is caused by vitreous degeneration, which is a natural aging phenomenon, that is, with the increase of age, glass will "liquefy" and produce some turbidity. Therefore, the official name of floaters is "vitreous disorder" or "vitreous floater". Seeing the black spots flying around in front of you is like the name of a floater. When opaque objects in the vitreous body are projected onto the retina, floaters will occur. It is more obvious in strong light or white background. Sensitive people can even describe their various shapes. Many floaters exist for a long time, unchanged all the year round, do not affect vision, and have no eye organ lesions after examination, which is of little clinical significance.

I sometimes see that my eyes are tired and I need to have a good rest. Don't worry, it's normal.