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Condition Focus · Vitreous Health
Eye Floaters
The specks, threads and cobwebs that drift across your vision — why they appear, why most are entirely harmless, and the three changes that mean you should be seen the same day.
Guidance you can trust, from a UK optometry team
Understanding the condition
What are eye floaters?
Most of your eye is filled with the vitreous — a clear gel, about 99% water, held in shape by a fine mesh of collagen fibres. In youth it is uniformly transparent and light passes straight through it.
With age, that gel slowly liquefies and the collagen mesh clumps together into strands and specks. What you see as a floater is not the clump itself, but the shadow it casts on your retina as light passes by.
That's why floaters behave the way they do: they drift rather than sit still, they dart away when you try to look straight at one, and they're most obvious against a bright, plain background like a white wall, a page, or the sky.
You're seeing a shadow, not an object
Clumps of collagen suspended in the vitreous block a little light on its way to the retina. The floater you perceive is the shadow they throw.
The two you're most likely to meet
Age-related floaters and vitreous detachment
Nearly all floaters fall into one of these two groups. One needs nothing more than time; the other is still usually harmless, but does need checking once.
The gradual, everyday kind. A few specks or threads that have been around for months or years and haven't changed. They come from the slow liquefying of the vitreous and need no treatment at all.
- Appear gradually, stay much the same
- More noticeable in bright light or against plain backgrounds
- Become easier to ignore as your brain adapts
The vitreous gel peels away from the retina — a normal part of ageing. It often causes a sudden burst of new floaters, sometimes with brief flashes of light.
- Usually settles by itself over weeks or months
- But it can tear the retina as it pulls away
- Get examined within 24 hours to rule that out
After surgery or injury
Floaters are common after cataract surgery and can follow a blow to the eye. New floaters after an injury should always be checked rather than assumed to be ordinary.
Blood or inflammatory cells
Bleeding into the vitreous — from diabetic retinopathy or a torn retinal vessel — and inflammation such as uveitis both cast floater-like shadows. These need medical assessment.
A sudden shower of new floaters, flashes of light, or a shadow or curtain moving across your vision can mean the retina has torn or begun to detach. This is a same-day emergency — contact an optometrist, an eye casualty unit or A&E immediately. Treated within hours or days, a tear is usually straightforward to repair; left alone, it can cause permanent sight loss.
Know your risk
Who gets floaters, and who needs to be more careful?
Floaters themselves are close to universal with age. What varies is the risk that a change in them signals a retinal problem — and these are the factors that raise it.
Age over 50
The vitreous liquefies steadily from middle age, and vitreous detachment becomes common through the sixties and seventies.
Short-sightedness
A longer, stretched eyeball thins the retina and brings vitreous changes earlier. Highly myopic eyes carry a notably higher risk of retinal tears.
Recent cataract surgery
Floaters frequently become more noticeable after cataract surgery, partly because vision is clearer and partly from changes to the vitreous.
Eye injury
A blow to the eye can disturb the vitreous and damage the retina. New floaters after any injury deserve a prompt examination.
Diabetes
Diabetic retinopathy can cause fragile vessels to bleed into the vitreous. Sudden dark floaters or a red haze need urgent assessment.
A previous tear or detachment
If you've had a retinal tear or detachment in either eye, your risk in the other is higher. Any change in floaters should be treated as urgent.
What they look like
Recognising ordinary floaters
Floaters are described in dozens of ways — grains of sand, hairs, tadpoles, smoke rings, a fly just out of reach. What they share is how they move, and that's the most useful thing to pay attention to.
They drift, then settle — they follow your eye movement with a lag and glide on after you've stopped looking.
They dodge your gaze — looking straight at one moves it away, because you're moving the eye it's suspended in.
Bright, plain backgrounds show them up — a white wall, a screen, a page, or a clear sky.
They fade from awareness — the floater usually stays, but over weeks your brain learns to filter it out.
The part of this page that matters most
The three signs that change everything
Ordinary floaters need no action. But the vitreous can tear the retina as it pulls away, and a tear can progress to a detachment — which threatens sight permanently. Three changes separate the two, and they are worth committing to memory.
You do not need to work out which is happening. If any of the three appear, get examined that day.
A useful habit: once in a while, cover one eye and look at a plain, bright wall, then swap. It takes ten seconds and makes you far more likely to notice a genuine change early, rather than after your other eye has quietly compensated for weeks.
1 · Flashes of light
Brief arcs or sparks, usually at the edge of vision and often more obvious in the dark. They mean the vitreous is tugging on the retina.
2 · A sudden shower of new floaters
Not one or two more, but a distinct burst — dozens of specks, or a sudden dark smudge that wasn't there yesterday.
3 · A curtain or shadow
A dark area spreading across your field of vision from one side, or from above or below. This suggests the retina is already detaching.
Any of the three?
Contact an optometrist, an eye casualty unit or A&E the same day. It is always better to be checked and reassured.
Assessment & treatment
How floaters are checked and treated
Assessment is straightforward, and the honest answer for most people is that no treatment is needed — which is genuinely good news, not a brush-off.
A dilated retinal examination
Drops widen the pupil so your optometrist can examine the whole retina, right out to its edges where tears usually occur. Expect blurred vision for a few hours afterwards, and don't drive to the appointment.
Reassurance and time
For ordinary floaters this is the whole treatment. The floater rarely disappears, but it typically sinks out of the line of sight and your brain stops flagging it.
Laser treatment for a tear
If a retinal tear is found, laser or freezing treatment seals the retina around it in a single outpatient visit, usually preventing a detachment entirely.
Vitrectomy — rarely, and carefully
Surgically removing the vitreous is reserved for floaters that severely impair vision, because it carries real risks including cataract and retinal detachment. It's a specialist decision, never a first resort.
- You suddenly see many more floaters than usual
- You see flashes of light, sparks or arcs
- A dark curtain or shadow is spreading across your vision
- Your vision drops suddenly, or a new dark smudge appears
These can indicate a retinal tear or detachment. Contact an optometrist, an eye casualty unit or A&E immediately — a tear treated within days is usually repaired straightforwardly, while a delayed detachment can cause permanent sight loss.
Living with them
Getting on with ordinary floaters
Once a serious cause has been ruled out, the job shifts from treating floaters to living alongside them — and most people find that gets markedly easier.
Give it time
Neuroadaptation is real. Most people who find floaters intrusive at first report months later that they rarely notice them, even though little has physically changed.
Adjust light and contrast
Floaters stand out most against bright, uniform backgrounds. Softer indoor lighting, a warmer screen and good sunglasses outdoors all reduce how visible they are.
Know your normal
Once you know what your usual floaters look like, a genuine change is far easier to spot. That awareness is the most valuable thing you can take from this page.
Keep up regular eye tests
A routine examination checks the retina as a matter of course, and gives you someone who already knows your eyes if something does change.
Nutrition & the vitreous
Nutrients studied for vitreous health
No food or supplement dissolves an existing floater. Research interest is in the collagen and hyaluronic acid that give the vitreous its structure, and whether supporting them influences how the gel ages.
The evidence here is early and limited. Treat any product in this space as an optional extra with modest expectations — and never as a reason to delay having new floaters examined.
| L-Lysine | An amino acid involved in the body's normal collagen formation |
| Vitamin C | Contributes to normal collagen formation for the normal function of blood vessels |
| Zinc | Contributes to the maintenance of normal vision |
| Grape seed extract | A source of proanthocyanidins, studied as antioxidants |
| Citrus bioflavonoids | Plant compounds studied alongside vitamin C for connective tissue support |
Food supplements do not remove floaters and are not a treatment for any eye condition. Nothing here should delay an eye examination — if your floaters have changed suddenly, are accompanied by flashes, or come with a shadow across your vision, seek care the same day. Speak to your optometrist or GP before starting a supplement, particularly if you take other medication.
From our range · Optional support
VitroCap N — targeted nutritional support for the vitreous
If you'd like to do something nutritional while your floaters settle, VitroCap N combines L-lysine, vitamin C, zinc, grape seed extract and citrus bioflavonoids in a single daily capsule, formulated specifically around vitreous health.
VitroCap N is a food supplement, not a medicine. It does not remove floaters and does not treat, prevent or cure any eye condition. It is not a substitute for having new or changing floaters examined.
Common questions
Frequently asked questions
Are eye floaters dangerous?
Will my floaters ever go away?
What's the difference between floaters and flashes?
Can floaters be removed?
Why did I get lots of floaters suddenly?
Does screen time cause floaters?
Does Ocular Express provide medical advice?
This page is for general information and awareness only and does not constitute medical advice or a diagnosis. It is not a substitute for a professional eye examination. If you have concerns about your vision, please consult a GOC-registered optometrist or your GP. Content clinically reviewed by the Ocular Express optometry team — last reviewed July 2026.