Floaters can be seen as dots, strands, cobwebs, circles or various small black shapes which move in your vision. Floaters are very common and can happen at any age, although more common with increasing age. You will particularly notice them if you look at a blank page, wall or the sky.
Floaters are caused by changes in the gel which fills the eyeball, leaving particles floating in this gel which cast shadows on the retina and make them visible to you. Whilst most floaters are considered normal, they can be indicative of more serious eye problems. If you notice new floaters or a change in the size and number of floaters, or if you notice unusual flashes in your vision, you should have your eyes thoroughly examined immediately.