When I fold a little bit my eyes and I look at a luminous source (like a light bulb or a window if there's sun outside), I see many spherical shapes and sometimes shapes like wires. I'm nearsighted but strangely I see quite well how the shapes are defined. Furthermore when I move my eyes the same shapes appear, but sometime they move on and others take their place. So I'm guessing it's a problem of my eyes (I have the effects from both). The spherical shapes looks like red blood cells seen from an optical microscope but transparent. I've noticed this "problem" since about 3 years. Is that normal?