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In a nutshell
Small threads, dots, or cobwebs appear to float in front of the eye. They are especially noticeable against a bright wall and often drift away when you try to look directly at them.
Why does it happen?
The vitreous is a gel-like substance inside the eye. Small condensations cast shadows on the retina, making them visible. Its movement after a shift of gaze lets the shadows lag behind; age-related changes can increase their number.
Observe it yourself
- Briefly look at a normally lit, bright wall and move your gaze once to the side.
- Observe whether any threads you see lag behind. Do not look at the sun or put pressure on the eye.
Stop if uncomfortable. This is not a diagnostic test.
How common – and for whom?
Common
Vitreous opacities are common and tend to be noticed more with age. The frequency and number of visible dots vary between individuals.
Frequency is a qualitative description, not your individual probability.
Is it normal?
Long-standing, unchanged individual floaters are usually harmless.
Voluntary control
They cannot be moved voluntarily; eye movements shift the perceived shadows.
When to seek advice
Suddenly many new dots, new flashes of light, or a curtain-like shadow require an immediate eye examination, even without pain.
Does this happen to you?
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Sources (1)
- Floaters — National Eye Institute (opens a new tab)
Vitreous opacities cause moving shadows; sudden new floaters and accompanying warning signs need an eye examination.
Editorial update: . AI-assisted research and editing; not individually reviewed by a physician. How we research
