Seeing black spots in your vision is common—about 87% of people report it—but not every spot is harmless. Vitreoretinal specialist Benjamin Lin, MD, says moving specks or squiggles that drift with eye ...

You glance up at a blue sky and notice something dark drifting across your view. Or maybe there’s a fixed, shadowy patch that doesn't move at all. Or perhaps a dark curtain seems to be creeping in ...