The short answer
Eye floaters are small specks, threads or cobwebs that drift across your vision. They’re shadows from tiny clumps in the clear gel that fills your eye. Almost everyone gets them as they get older, and most are harmless. But a sudden shower of new floaters, flashes of light, or a shadow over part of your vision can be a sign of a retinal tear. That needs an eye exam the same day.
You know the ones. Little specks, threads or cobwebs drift across your vision, especially when you look at a bright sky or a white wall. You try to look right at them, and they dart away. Those are eye floaters. If you have them, you’re in good company.
Most of the time, floaters are harmless. They can be annoying, but they don’t hurt your vision. Over weeks and months, your brain usually learns to tune them out.
Once in a while, though, floaters are a warning sign of something serious in the back of the eye, like a retinal tear or detachment. That needs care right away to protect your vision. This guide explains how to tell “normal” from “get seen today.”
Key Takeaways
- Floaters are small shapes that drift through your vision. They come from changes in the vitreous (the clear gel that fills your eye).
- Most floaters are harmless, and they become more common with age.
- A sudden shower of new floaters, flashes of light, or a shadow in your vision can mean a retinal tear or detachment. That’s an emergency.
- Most floaters fade or become less noticeable over time.
- You’re more likely to get floaters if you’re nearsighted, have diabetes, or have had cataract surgery.
- Only an eye exam can tell if your floaters are harmless or a warning sign.
What Are Eye Floaters?
The inside of your eye is filled with a clear, jelly-like gel called the vitreous. It helps your eye keep its round shape. When you’re young, this gel is firm and clear. As you get older, it slowly turns more watery, and tiny strands inside it clump together.
Those clumps cast shadows on your retina (the thin layer at the back of your eye that senses light). What you see as a floater is really the shadow of a clump drifting in the gel. That’s why floaters move when your eyes move, and why they seem to slip away when you try to look straight at them.
Floaters come in many shapes: dots, circles, threads, squiggles or cobwebs. You’ll notice them most against a bright, plain background, like a clear sky, a white wall or a computer screen.
Want to know more about how the parts of your eye work together? Read our guide: Parts of the eye and how they work.
What Causes Eye Floaters?
The most common cause is simply getting older. The National Eye Institute (NEI) says almost everyone develops floaters with age.
Over time, the vitreous gel can shrink and pull away from the back of the eye. This is called a posterior vitreous detachment, or PVD. It’s a normal part of aging. It often brings a batch of new floaters, and sometimes quick flashes of light. PVD itself is usually harmless. But sometimes the gel tugs hard enough to tear the retina, so a new PVD should be checked by an eye doctor.
Other causes include:
- Nearsightedness (when things far away look blurry). Nearsighted eyes tend to get floaters earlier and more often.
- Eye surgery, such as cataract surgery, or an injury to the eye.
- Swelling inside the eye, called uveitis (an inflammation inside the eye), or an eye infection.
- Bleeding inside the eye. In people with diabetes, this can come from diabetic retinopathy (diabetes damage to the blood vessels in the retina).
- A retinal tear or detachment. These are the serious ones.
Who Is Most Likely to Get Floaters?
Anyone can get floaters. NEI says you’re more likely to get them if you:
- Are older, especially over 50
- Are very nearsighted
- Have diabetes
- Have had cataract surgery
Having one of these doesn’t mean you’ll have trouble. It just means floaters are more likely, and worth keeping an eye on.
What Do Normal Floaters Look Like?
Normal floaters look like a few specks or strands that drift when your eyes move, then slowly drift back. You notice them most in bright light. They’ve been there a while, they haven’t changed much, and nothing else is going on with your vision.
Floaters like these are almost always harmless. Over time, your brain tunes them out and you notice them less.
What matters most is change. A sudden change in your floaters, especially with other symptoms, is the thing to take seriously.
Call your eye doctor right away if you notice:
- A sudden shower of new floaters
- Flashes of light, like lightning streaks or a camera flash, often off to the side
- A dark shadow or curtain moving over part of your vision
- A gray or blurry area blocking part of your sight
- Sudden vision loss
These can be signs of a retinal tear or detachment. NEI calls these a medical emergency. Get seen the same day. Don’t wait to see if it goes away.
What Are the Warning Signs of a Retinal Detachment?
A retinal detachment is when the retina pulls away from the back of the eye. It often starts with a small tear. The warning signs are the ones in the box above: a sudden burst of new floaters, new flashes of light, or a shadow or curtain over part of your vision.
The longer a detached retina goes without treatment, the more vision you can lose, and some of it may not come back. Getting checked quickly gives you the best chance to protect your vision. When in doubt, get seen the same day.
Why Do I See Flashes of Light?
Flashes happen when the vitreous gel rubs or pulls on the retina. The American Academy of Ophthalmology (AAO) says it’s common to see flashes now and then as you get older.
A flash now and then can be part of normal aging. But new flashes, lots of flashes, or flashes with a sudden shower of floaters can mean a retinal tear. New flashes are worth a prompt eye exam.
How Are Floaters Checked?
The only way to know if floaters are harmless or a warning sign is a dilated eye exam. You can’t tell the difference by how they look to you.
The dilated eye exam
Your eye doctor puts drops in your eyes to widen your pupils (the black circles in the middle of your eyes). Then the doctor uses special lenses to look at your whole retina, including the far edges, where tears often start. This shows whether the gel has simply pulled away as part of aging, or whether it has torn the retina. For new or sudden floaters, this exam is the most important step.
Other tests
If part of the retina is hard to see, or if there’s bleeding in the eye, your eye doctor may use other tests. One is an ultrasound of the eye, which uses sound waves to see inside. Another is an OCT scan, which takes a detailed picture of the layers of the retina. Both tests are quick.
Tip for your visit
Bring someone to drive you home. The dilating drops can make your vision blurry and bright light uncomfortable for a few hours.
How Are Eye Floaters Treated?
Here’s the good news: most floaters don’t need any treatment. AAO says floaters tend to fade and become less noticeable over time.
Watch and wait
For normal floaters, the usual advice is to give it time. Your brain adapts, and floaters usually bother you less over weeks to months. This is the right first step for most people.
When floaters get in the way of daily life
Once in a while, floaters are so thick or so many that they make it hard to read or see. In these rare cases, a surgery called a vitrectomy can remove the gel and the floaters. AAO says this surgery has risks and is seldom needed. Your eye doctor will talk with you about the risks and benefits.
Treating the cause
If your floaters come from a retinal tear, a detachment or bleeding, treatment goes after that problem. A retinal tear can often be sealed with a laser or a freezing treatment. A detachment usually needs surgery soon. Bleeding from diabetes is treated as part of caring for diabetic eye disease. In all of these, getting care quickly matters.
Noticed new floaters or flashes? Don’t wait.
Can You Prevent Eye Floaters?
You can’t really prevent floaters that come with age. They’re a normal part of how your eyes change. But you can protect your eyes and catch problems early:
- Get regular eye exams, especially after 50, or if you’re nearsighted or have diabetes.
- Wear safety glasses for sports, yard work and shop work.
- If you have diabetes, keep your blood sugar in your target range.
- Learn the warning signs, so you can act fast if something changes.
- Don’t rub your eyes to try to get rid of a floater. It won’t help.
The best thing you can do is know when to call. Telling a normal floater from an emergency is what protects your vision.
When Should I See an Eye Doctor for Floaters?
Make an appointment if you have new floaters, even mild ones, so your eye doctor can check that your retina is healthy. NEI says to tell your eye doctor about new floaters that appear suddenly and don’t go away. This matters most after age 50, or if you’re nearsighted.
Get care the same day if you have a sudden burst of new floaters, flashes of light, a shadow or curtain over your vision, or any sudden vision loss. It’s always better to get checked and hear good news than to wait on a retinal detachment.
Living With Floaters
For most people, living with floaters takes some patience. In the first few weeks, they can be distracting. But your brain is good at learning to ignore them, and most fade into the background over time.
A few tips can help:
- Move your eyes up and down, or side to side. This can shift a floater out of your line of sight.
- Use soft, even lighting. Bright, plain backgrounds make floaters stand out.
- Remember that most floaters are harmless. Knowing that can ease the worry.
If your floaters ever change suddenly, don’t brush it off as “just my floaters.” That’s exactly the time to get checked.
Frequently Asked Questions
Are eye floaters dangerous?
Usually not. Most are a harmless part of aging. The exception is a sudden shower of new floaters, especially with flashes or a shadow in your vision. That can mean a retinal tear or detachment and needs care the same day.
Will my floaters ever go away?
Most floaters become much less noticeable over weeks to months as your brain adapts. They may not disappear completely, but they usually stop bothering you.
What’s the difference between normal floaters and an emergency?
Floaters you’ve had for a while that haven’t changed are almost always harmless. A sudden shower of new floaters, flashes of light, or a dark curtain over your vision is a warning sign. Get seen the same day.
Can floaters be removed?
Yes, but it’s not usually recommended. A surgery called a vitrectomy can remove floaters, but it has risks. It’s only used when floaters make everyday seeing very hard.
Do screens cause floaters?
No. Screens don’t cause floaters. But a bright screen is a plain background, so it can make the floaters you already have easier to notice.
I’m nearsighted. Am I more likely to get floaters?
Yes. Nearsighted eyes tend to get floaters earlier and more often, and they have a higher risk of retinal tears. Regular eye exams and knowing the warning signs matter even more.
Should I get new floaters checked, even if they seem minor?
Yes, it’s a good idea. Only a dilated eye exam can show if new floaters are harmless or a sign of a retinal problem. A quick check gives you peace of mind or early care.
Get Your Floaters Checked Close to Home
Floaters are usually nothing to worry about, but knowing when to act matters. If you’ve noticed new floaters, or you’re seeing flashes of light or a shadow in your vision, get your eyes checked soon. Dr. James Powers and our team see patients at our St. Petersburg, Clearwater and New Port Richey offices, and we can tell you whether your floaters are harmless or need treatment.
Ready to schedule your eye exam?
- New Port Richey — 5413 US Highway 19, New Port Richey, FL 34652
- Clearwater — 2565 Enterprise Rd, Clearwater, FL 33763
- St. Petersburg — 603 7th St S, St. Petersburg, FL 33701
More guides: Glaucoma · Macular degeneration · Dry eye · Parts of the eye
Sources: National Eye Institute, “Floaters” (nei.nih.gov); American Academy of Ophthalmology, “What Are Floaters and Flashes?” (aao.org).
This article is general information, not medical advice for your eyes. For advice about your own eyes, call us or see your eye doctor.