Eye Floaters: What They Are and When to Worry

Nearly everyone gets floaters eventually.

They’re the specks, threads and cobwebs that drift across your vision, most obvious against a blank white wall or a bright sky.

The question is never really “what are these.” It’s “should I be worried about these.” So let’s answer that one properly.

What are eye floaters?

That’s the National Eye Institute’s explanation, and it’s the clearest one there is: strands of vitreous stick together and cast shadows on your retina.

Two things follow from that, and they explain almost everything patients ask me.

Why they dart away when you look at them. The clump is floating in gel, not fixed in place. When your eye swings across to look at it, the gel swings too, and the floater slides out of the way. The American Optometric Association puts it exactly that way: they seem to dart away when you try to look at them directly.

Why a blank white wall is the worst place to look. A bright, plain background gives the shadow nothing to hide behind, and bright light narrows your pupil, which sharpens the shadow’s edges. Same floater, far more visible. Clear sky, white wall, blank page, bright screen.

Most people have a few. Most people have had them for years without ever mentioning it.

Why do I suddenly have more floaters?

The NHS describes PVD as a harmless process, and for most people it is exactly that. It’s not a disease and it doesn’t need fixing.

Here’s the scale of it.

The 66% figure comes from Cleveland Clinic. The 8 to 15% range is a long-standing clinical estimate, quoted in the American Optometric Association’s guideline on retinal detachment and echoed in the Academy of Ophthalmology’s EyeWiki. The last figure is the National Eye Institute’s.

Read those three together and you get the whole argument of this page. A PVD is common and usually fine. A small share of them tear something. And a tear caught early is very treatable.

Two more details worth knowing.

If a PVD comes with bleeding into the vitreous, the odds of a tear rise sharply, into the range of 50 to 70%. That presentation gets treated as urgent, no exceptions.

And if you’ve had a PVD in one eye, the other eye usually follows within about six months to two years. Knowing that in advance saves a lot of panic later.

When are floaters an emergency?

Here’s the split, side by side.

That right-hand column is drawn almost word for word from the NHS and the National Eye Institute. Neither of them gives a deadline in hours, and I won’t invent one. What they both use is the language of emergency rather than appointments. Same day.

One correction worth making, because it catches people out. You do not need flashes for this to matter. A sudden increase in floaters on its own is on both organisations’ urgent list. Flashes are sometimes there and sometimes not.

Can you actually get rid of floaters?

Let’s take the marketing first, because it’s everywhere.

Supplements. No national eye health authority lists any vitamin, antioxidant or nutraceutical as a treatment for floaters. Not the National Eye Institute, not the NHS, not the American Optometric Association. Nobody.

That isn’t the same as a study proving they fail. It’s that nothing has ever shown they work, and no eye body recommends them. On drops specifically, MedlinePlus is blunt: marketed homeopathic drops have not been shown to have proven benefit.

Eye exercises. Same answer. No recognised eye health body recommends them for floaters.

Laser floater removal. This one deserves a longer answer, because it’s sold hard.

In 2017 the Cochrane Library went looking for randomised trials comparing YAG laser to surgery for floaters. They found none at all. Their conclusion was that it’s unclear whether laser or surgery is better, because the comparison has never been run.

Be careful how you read that. It isn’t proof the laser fails. It’s proof nobody has done the work to show it beats the alternative. There is one small placebo-controlled trial, summarised by the Academy of Ophthalmology’s EyeWiki, in which 54% of the laser group reported improvement against 9% of controls. That’s a real signal, and I’d rather report it than bury it.

What concerns me is the other half of the ledger. EyeWiki documents cataract formation, retinal injury and pressure rises severe enough to need glaucoma surgery, and then says this:

That’s the Academy’s own reference site, not a critic. And note what the laser actually does. MedlinePlus describes it as breaking floaters up so they’re less visible, not removing them. “Laser floater removal” is a product name, not a description.

Vitrectomy. Surgery to remove the vitreous entirely does work. It’s also a major eye operation, and MedlinePlus calls it exactly that.

The cost is usually your natural lens. In one series of patients having vitrectomy with a gas bubble, 80% of those over 50 had developed a cataract within two years, against 7% of those under 50. Retinal detachment, infection, bleeding and raised pressure are all on the complication list too.

For a small number of people whose floaters genuinely wreck their daily vision, that trade can still be worth it, and I’ll refer for it. For most people it isn’t close.

The honest good news is the one thing nobody sells you: floaters usually become less noticeable as you get used to them. Note the wording. Not gone. Ignored. That’s a real and reliable process, and for the overwhelming majority it’s the whole treatment.

Who is at higher risk of a retinal tear?

On nearsightedness, the usual threshold for “high myopia” is around minus six diopters or more, though you’ll see different cut-offs quoted. A longer eye means a more stretched, thinner retina, and stretched tissue tears more easily.

The National Eye Institute lists the rest: a personal or family history of retinal detachment, serious eye injury, previous eye surgery including cataract procedures, severe nearsightedness, and diabetes-related retinal conditions.

That cataract surgery entry surprises people. The operation is safe and routine, but removing the lens changes how the vitreous sits and moves, and the risk of detachment goes up afterwards. If you’ve had cataract surgery and you get a burst of new floaters, that’s a call, not a wait-and-see.

And if you have diabetes, floaters can mean something different again: bleeding from fragile new vessels at the back of the eye. That’s covered in our guide to blurry vision in one eye, and it’s another reason the yearly dilated exam matters.

What happens at the appointment

1. History. When did it change, one eye or both, any flashes, any shadow. This alone tells me most of what I need to know about urgency.
2. Vision and pressure. Quick baseline checks in each eye separately.
3. Dilating drops. Roughly 20 minutes to take effect. Bring sunglasses and don’t plan on driving straight after.
4. Indirect ophthalmoscopy. A wide, three-dimensional view of the retina. This is the part that finds tears, and it’s why the drops are non-negotiable.
5. Scleral depression if needed. Gentle pressure on the outside of the lid to bring the very furthest edge of the retina into view. Slightly odd sensation, over in a minute.
6. The plan. Usually reassurance plus a recheck in four to six weeks. Sometimes a same-day referral.

If I find a tear, it’s treated with a laser or a freezing probe to seal the retina down around it. The National Eye Institute notes this is usually done in an office setting, which is worth knowing: a tear caught early is not a hospital operation.

New Jersey’s definition of optometry doesn’t include laser or surgical procedures, so that part goes to a retina specialist. My job is to find it, and to make sure you’re seen quickly rather than handed a phone number.

Frequently asked questions

Are eye floaters serious?

Usually not. Most floaters are age-related clumps in the vitreous gel and are completely harmless, and the American Optometric Association notes they rarely limit vision.

The exception is change. A sudden increase, flashes of light, a shadow or curtain, or vision loss can mean a retinal tear or detachment, and those need same-day attention.

Do eye floaters go away?

Not usually, and this is where a lot of articles mislead people. The floater itself tends to stay. What changes is that your brain adapts and stops flagging it, and some floaters drift out of your direct line of sight.

The NHS puts it as floaters becoming less noticeable as you get used to them. In practice most people stop thinking about them within a few months.

Can floaters be cured with supplements or eye drops?

There’s no evidence for it, and no eye health authority recommends any supplement for floaters. MedlinePlus specifically notes that marketed homeopathic drops have not been shown to have proven benefit.

This is a well-monetised corner of the internet. If a product promises to dissolve floaters, ask what trial it’s relying on.

What causes flashes of light in the corner of my eye?

Usually the vitreous gel tugging on the retina as it separates. The retina interprets any tug as light, so you see a brief arc or flicker, often at the edge of your vision and more obvious in the dark.

That tugging is the exact mechanism that can tear a retina, which is why flashes with floaters go straight to the urgent list rather than the routine one.

Is laser floater removal worth it?

I’d be cautious. A 2017 Cochrane review looking for trials comparing laser with surgery for floaters found none at all, so there’s no good head-to-head evidence either way.

Meanwhile the Academy of Ophthalmology’s own reference site documents cataract, retinal injury and pressure spikes as complications, and questions whether that risk profile makes sense for something that isn’t threatening your sight. For most people it doesn’t.

I had floaters checked last month and I have more now. Do I need to go back?

Yes. A clean exam tells you there was no tear that day, not that one can’t develop afterwards, and tears do turn up in the weeks following a PVD.

That’s why a recheck at four to six weeks is standard, and why any new flashes or new floaters before then mean coming in sooner rather than waiting for the appointment.

This article is general information, not medical advice. If you have had a sudden increase in floaters, flashes of light, or a shadow across your vision, seek same-day eye care rather than reading further.