As we age the vitreous inside the eye tends to shrink and may eventually separate from the inside surface of the eye. This is called a posterior vitreous detachment or PVD. When PVD occurs it is often accompanied by flashes of light and the appearance of tiny black spots in the vision. In general PVD’s are not dangerous but they can lead to more serious conditions. If vitreous detachment is left untreated these conditions can lead to vision loss.