Floaters need immediate medical attention of an ophthalmologist because of
the risk of
the severe retinal detachment, which can cause vision loss. However, there are other causes of floaters which are less severe.
The shapes of floaters vary, with effects such as spots, dots, wavy lines, cloud-like shapes, spidery-webs, and other variations. There may be one large floater, or many smaller floaters, or any combination. Floaters may be caused by opaque substances (e.g.