Why are there black spots moving when the eyes see things?

When the vitreous body is turbid, it is a conscious phenomenon, that is, when looking at the white wall or overlooking the sky, black spots float in the field of vision, sometimes in the form of floaters, commonly known as "floaters", the number may be one or more, and move with the change of sight. This is the image state that cells feel about transparent body's opacity, which is called endoscopicity and can be divided into physiological and pathological.

When the vitreous body is liquefied, because the reticular structure of the vitreous body pulls on the retina, it often makes people feel a sense of flash, which eventually leads to retinal detachment.

After macular degeneration, it may also lead to visual field defect, but it does not move with the line of sight.

If the vitreous body is turbid and there is no flash, it is generally not a big problem. If you are not at ease, you can go to the hospital for a check-up.