Black Floaters in the Eye
Black or grey floaters are usually a harmless result of the gel inside the eye (the vitreous) separating from the retina. If you also see flashes of light or a sudden increase in floaters, have your eyes examined straight away to rule out a retinal tear.
What causes floaters?
The back of the eye is filled with a gel called the vitreous. Over time the vitreous becomes denser and may separate from the retina. The resulting clumps are seen as grey or black specks that move with eye movements, especially when looking at a light-coloured surface.
When is it urgent?
Most vitreous separations are harmless. However, if the vitreous is stuck to the retina, a tear can form as it separates, and a tear can lead to retinal detachment.
Have an eye examination without delay if you notice:
- Flashes of light
- A sudden increase in floaters
- A curtain or shadow across your vision
Treatment
Harmless floaters usually need no treatment and tend to become less noticeable over time. For very large floaters that clearly disturb vision, laser treatment may be considered in selected patients; the evidence for it is still limited.
Frequently asked questions
Are floaters dangerous?
Usually not; if there are flashes or a sudden increase, seek an examination straight away.
Do floaters go away?
They usually become less noticeable over time.
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This page is for general information only and does not replace a medical consultation. Anatomy and treatment plans differ from patient to patient.