Eye Floaters: Causes, Symptoms & When to Seek Urgent Care
Updated: 2 days ago
Medically reviewed by Dr. Baraa Alnahhal, MD · Last reviewed: September 2026
Eye floaters are spots, strings, or cobwebs that drift through your vision when the vitreous — the jelly-like substance inside your eye — liquifies and contracts with age. Clumps of microscopic collagen fibers cast tiny shadows on the retina, and those shadows are what you see. Most floaters are harmless and need no treatment, and many people learn to ignore them over time. However, a sudden increase in floaters, flashes of light, or a gray curtain blocking your vision can signal a retinal tear or detachment — painless but sight-threatening emergencies that require immediate care from an eye specialist.
Quick Answer
What are eye floaters? Spots, strings, or cobwebs drifting in your vision, caused by shadows from collagen clumps in the vitreous jelly of your eye.
Why do they appear? Age-related changes make the vitreous liquify and contract, pulling collagen fibers into clumps and strings that block light.
Are they dangerous? Most are harmless and need no treatment, but floaters can accompany retinal tears — the biggest concern with floaters.
When is it an emergency? Sudden new floaters, many more floaters than usual, flashes of light in the same eye, a gray curtain or blurry area, or darkness on the side of your vision.
How are they treated? Most often with no treatment at all; rarely, laser vitreolysis or surgery (vitrectomy) if floaters block vision. Any underlying cause, such as bleeding or inflammation, is treated first.
What Are Eye Floaters?
Eye floaters are spots in your vision. They may look like black or gray specks, strings, or cobwebs that drift through what you are looking at. They move when you move your eyes, and they appear to dart away when you try to look at them directly.
Eye floaters form when collagen clumps in the vitreous jelly cast tiny shadows on the retina. Most people see them as black or gray specks, strings, or cobwebs — most noticeable against a bright blue sky or white wall.
For most people, floaters are a normal part of aging. The vitreous is a jelly-like substance that fills the space between the eye's lens and its retina. It is made mostly of water, along with collagen — a type of protein — and hyaluronan, a type of carbohydrate. The vitreous helps the eye keep its round shape.
With age, the vitreous liquifies and contracts. As it pulls away from the inside surface of the eyeball, microscopic collagen fibers clump together. These scattered pieces block some light and cast tiny shadows on the retina. Those shadows are the floaters you see.
Once you know the floaters will not cause more problems, adjusting to them can still take time. But over time, most people learn to ignore them or notice them less often. The spots tend to settle down and drift out of the line of vision.
What Eye Floaters Look and Feel Like
Floaters share a recognizable pattern. Here's how they typically show up in daily life.
Appearance: Dark specks, or knobby, transparent strings of floating material
Movement: Spots move when you move your eyes; they dart away when you try to look at them directly
Visibility: Most noticeable against plain, bright backgrounds — a blue sky or a white wall
Behavior over time: Shapes eventually settle down and drift out of the line of vision
What Causes Eye Floaters?
Age-related changes in the vitreous explain most floaters, but five different causes can produce them. Understanding the difference matters because a few causes need prompt treatment.
Age-related eye changes: The vitreous liquifies and contracts; collagen fibers form clumps and strings that cast shadows on the retina. The most common cause; usually harmless
Inflammation in the back of the eye: Posterior uveitis — inflammation of the back of the eye, including the retina and the choroid layer — releases inflammatory debris into the vitreous. Can stem from infection or autoimmune and inflammatory diseases; needs treatment
Bleeding in the eye: Blood cells enter the vitreous from retinal tears or detachments, diabetes, high blood pressure, blocked blood vessels, or injury. Blood cells are seen as floaters; the bleeding source must be found
Torn retina: A contracting vitreous tugs hard enough on the retina to tear it; fluid can leak behind the tear and pull the retina off the back of the eye. Untreated retinal detachment can cause permanent vision loss
Eye surgeries and eye medications: Medications injected into the vitreous can form air bubbles; silicone oil bubbles added during vitreous or retina surgery can also be seen. Bubbles are seen as shadows until the eye absorbs them
The term uveitis refers to inflammation in the uvea, the middle layer of tissue in the eye wall. When it affects the back of the eye, it is called posterior uveitis. Diabetic retinopathy is a diabetes complication that damages the blood vessels of the retina and can cause bleeding seen as floaters.
Retinal Detachment: The Emergency Floaters Can Hide
Retinal detachment is the condition that makes some floaters urgent. It is an emergency situation in which the thin layer of tissue at the back of the eye — the retina — pulls away from its usual position. The retinal cells separate from the layer of blood vessels that provides oxygen and nutrients.
The mechanics are easy to picture: fluid can seep in under a retinal tear and lift the retina off like wallpaper off a wall. Without treatment, a retinal tear may lead to retinal detachment, and retinal detachment can cause blindness. Symptoms of detachment often include flashes and floaters in your vision.
Most floaters are harmless, but a sudden change can signal a retinal tear or detachment — painless but sight-threatening. Contact an eye specialist immediately if new floaters arrive suddenly, flashes of light appear, or vision is blocked.
When Should You See an Eye Specialist?
Most eye floaters don't require treatment. But some changes around floaters are warnings, not annoyances.
Contact an eye specialist immediately if you notice any of the following:
Many more eye floaters than usual
A sudden onset of new floaters
Flashes of light in the same eye as the floaters
A gray curtain or blurry area that blocks part of your vision
Darkness on one side or both sides of your vision (peripheral vision loss)
These symptoms are painless, which makes them easy to dismiss. They could be caused by a retinal tear, with or without retinal detachment — a sight-threatening condition requiring immediate attention. Because floaters are most often a normal part of aging, regular eye exams are recommended to make sure the condition doesn't worsen.
Who Is at Higher Risk for Eye Floaters?
Floaters become more common as you get older and are more common in people who are nearsighted. Here are the main risk factors.
Age over 50 years: The vitreous liquifies and contracts more with age
Nearsightedness: Floaters appear more often in nearsighted eyes
Eye injury: Trauma can cause bleeding or retinal tears
Complications from cataract surgery: Surgery on the eye can trigger vitreous changes
Diabetic retinopathy: Diabetes damages retinal blood vessels, causing bleeding
Eye inflammation: Inflammation releases debris into the vitreous
How Are Eye Floaters Diagnosed?
An eye care specialist conducts a complete eye exam to determine the cause of your floaters. The exam usually includes eye dilation: eye drops widen the dark center of the eye, allowing the specialist to better see the back of the eyes and the vitreous. This is the same tool used to check for retinal tears, detachment, bleeding, and inflammation — the conditions that make floaters dangerous rather than merely annoying.
How Are Eye Floaters Treated?
Most eye floaters don't require treatment. Any medical condition that is causing the floaters — such as bleeding from diabetes or inflammation — should be treated on its own.
Once you know your floaters will not cause more problems, most people adjust to them. Over time, you may be able to ignore them or notice them less often.
If floaters get in the way of your vision — which happens rarely — you and your eye care specialist may consider one of two treatments.
Floaters are evaluated with a dilated eye exam. Emergencies are ruled out first, underlying causes are treated, and most cases simply settle with time. Only rarely do floaters warrant laser vitreolysis or vitrectomy surgery.
Vitreolysis (laser treatment): An ophthalmologist aims a special laser at the floaters in the vitreous; it may break them up and make them less noticeable. Some people report improved vision; others notice little or no difference. There is a risk of damage to the retina if the laser is aimed incorrectly
Vitrectomy (surgery): An ophthalmologist specialized in retina and vitreous surgery removes the vitreous through a small incision; the vitreous is replaced with a solution that helps the eye keep its shape. Surgery may not remove all floaters, and new floaters can develop afterward. Risks include infection, bleeding, and retinal tears
Both treatments are rarely done. The default path for most people is simply to confirm the floaters are harmless at a dilated exam, treat any underlying condition, and give the brain time to adapt.
Preparing for Your Eye Appointment
Make an appointment with a specialist in eye disorders — an optometrist or an ophthalmologist — for an eye exam. If complications requiring treatment are found, you will need an ophthalmologist, a medical doctor who specializes in eye disorders.
Before your appointment, make a list of your symptoms, including situations that increase floaters and times when you see fewer of them. Also list all the medications, vitamins, herbs, and supplements you take, with their dosages, and write down questions to ask.
Your specialist will likely ask questions such as:
When did your eye floaters begin?: Establishes whether onset was sudden or gradual
Which eye has the floaters?: Helps localize the problem to one eye
Have your symptoms been continuous or occasional?: Patterns point to different causes
Have you recently noticed an increase in floaters?: A sudden increase can signal a retinal tear
Have you seen light flashes?: Flashes often accompany retinal tears or detachment
Does anything improve or worsen your symptoms?: Helps characterize the floaters
Have you ever had eye surgery?: Surgery can cause bubble-related floaters
Do you have conditions like diabetes or high blood pressure?: Both can cause bleeding seen as floaters
Good questions to ask your doctor include: Why do I see these eye floaters? Will they always be there? What can I do to prevent more from occurring? Are treatments available? Are there brochures or recommended websites? Do I need a follow-up appointment, and if so, when?
Bottom Line
Eye floaters are one of the most common — and most misunderstood — vision changes. In most cases they are simply the visible sign of a vitreous jelly that has begun to change with age, and they fade into the background of your vision over time. No treatment is needed, and no alarm is warranted.
The important exception is the sudden change. New floaters arriving all at once, many more than usual, flashes of light in the same eye, a gray curtain across your vision, or darkness at the edges — any of these can point to a retinal tear or detachment that is painless but sight-threatening. The same symptom that is usually harmless can occasionally be the warning sign of an emergency, and a dilated eye exam is the only way to tell the difference.
Your next steps: if you have steady, long-standing floaters, mention them at your next routine eye exam. If you are over 50, nearsighted, diabetic, or recently had eye surgery, schedule a regular exam if you haven't had one recently. And if floaters ever arrive suddenly, or come with flashes or a curtain over your vision, contact an eye specialist immediately — do not wait to see if it passes.
Frequently Asked Questions
What are eye floaters?
Eye floaters are small shapes in your vision that appear as dark specks or knobby, transparent strings of floating material. They are caused by tiny shadows that clumps of collagen fibers cast on the retina from inside the vitreous jelly of the eye. Floaters move when you move your eyes and seem to dart away when you try to look at them directly.
Are eye floaters normal or a sign of something serious?
Most eye floaters are a normal part of aging caused by the vitreous jelly liquifying and contracting. They don't require treatment. However, a sudden increase in floaters, flashes of light, or a gray curtain blocking part of your vision can signal a retinal tear or detachment — painless but sight-threatening conditions that need immediate care. A dilated eye exam is the only reliable way to tell which situation you're in.
Why do I suddenly see more floaters?
A sudden onset of new floaters, or many more floaters than usual, can mean the vitreous has tugged hard enough on the retina to tear it, or that there is bleeding or inflammation inside the eye. Causes include retinal tears, retinal detachment, diabetic retinopathy, high blood pressure, blocked blood vessels, eye injury, or uveitis. This is the scenario where you should contact an eye specialist immediately.
Can eye floaters go away on their own?
Most eye floaters don't require treatment, and they don't vanish — but they usually become much less noticeable. The shapes tend to settle down and drift out of your line of vision, and once you know they won't cause more problems, your brain gradually learns to ignore them. Regular eye exams are recommended to ensure nothing is worsening behind them.
When should I worry about eye floaters?
Worry enough to act fast if you see any of these: many more floaters than usual, a sudden onset of new floaters, flashes of light in the same eye as the floaters, a gray curtain or blurry area blocking part of your vision, or darkness on one or both sides of your vision. These painless symptoms could be caused by a retinal tear or detachment, and retinal detachment can cause blindness if untreated. Get a dilated eye exam right away.
Are there treatments for eye floaters?
Most floaters need no treatment, and the default advice is to let them fade into the background. When floaters rarely get in the way of your vision, two options exist: vitreolysis, a laser that breaks up floaters (results vary, with a risk of retinal damage if aimed incorrectly), and vitrectomy, surgery that removes the vitreous through a small incision (risks include infection, bleeding, and retinal tears, and new floaters can develop afterward). Any underlying cause, such as bleeding or inflammation, is treated first.
References
Eye floaters — Symptoms and causes (Mayo Clinic)
Eye floaters — Diagnosis and treatment (Mayo Clinic)
This article is based on clinical reference sources current as of July 2, 2024. Medical information changes over time — this content is for general education and is not a substitute for professional medical advice. Always consult a licensed clinician for diagnosis and treatment.
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