I see a lot of floaters in my eyes since i was little but recently there's been a lot of dark black ones too. can see with eyes closed, are they bad?

Floaters: Although seeing floaters in your eyes is rather common, changes in the amount or type with or without other changes, like flashing lights, decrease in vision or obscuration of vision may mean a problem. A dilated eye examination by an eye MD is an important first step to determining if a problem is present, especially if your diabetic or other medical problems.