Eye floaters are small shapes that drift across your vision, caused by tiny clumps of protein fibers inside the gel that fills your eyeball. They look like specks, threads, cobwebs, or squiggly lines, and they move when you move your eyes. Most floaters are harmless and extremely common, especially after age 50. In some cases, though, a sudden increase in floaters signals a problem that needs immediate attention.
What Floaters Actually Are
Your eyeball is filled with a jelly-like substance called the vitreous, made mostly of water, collagen protein, and a carbohydrate called hyaluronan. When the vitreous changes over time, collagen fibers within it form clumps and strings. These scattered pieces block some of the light passing through the eye and cast tiny shadows on your retina, the light-sensitive layer at the back of your eye. Those shadows are what you see as floaters.
Floaters aren’t on the surface of your eye, which is why blinking doesn’t clear them away. They’re floating inside the gel, so they tend to drift when you try to look directly at them. You’ll notice them most against bright, uniform backgrounds like a blue sky, a white wall, or a lit screen.
Why They Appear
The most common reason floaters show up is aging. As you get older, the vitreous gradually becomes more liquid and starts to shrink. Eventually, it pulls away from the retina in a process called posterior vitreous detachment, or PVD. This happens in stages: the gel first separates from the central area of the retina, then progressively detaches until it’s fully separated from both the retina and the optic nerve.
PVD is a natural part of aging, not a disease. But as the vitreous peels away, it often releases clumps of collagen and other debris into your field of vision. People describe seeing bugs, cobwebs, hairs, or dust. A common shape is a circular or oval shadow called a Weiss ring, which forms when the vitreous pulls away from the optic nerve and leaves a ring-shaped piece of tissue floating freely.
Other factors that accelerate vitreous changes include nearsightedness, eye injuries, eye surgery, and inflammation inside the eye. A condition called uveitis, which is inflammation of the inner eye structures, can produce floaters when inflammatory cells enter the vitreous. In intermediate uveitis specifically, the inflammation directly affects the vitreous gel itself.
When Floaters Are an Emergency
Most floaters are nothing to worry about. But a sudden burst of new floaters, especially accompanied by flashes of light or a shadow creeping over part of your vision, can signal a retinal tear or retinal detachment. This is an emergency that can cause permanent vision loss if not treated quickly.
The warning signs to watch for include:
- A sudden appearance of many new floaters or dark floating shapes
- Flashes of light in one or both eyes
- Blurred vision that comes on rapidly
- A loss of side (peripheral) vision
- A curtain-like shadow spreading across your field of vision
If you notice any of these, get a dilated eye exam within days, ideally sooner. Retinal detachment is treatable, but outcomes are much better the earlier it’s caught. A single new floater that appears gradually and doesn’t come with flashes or vision changes is far less concerning, but it’s still worth mentioning at your next eye appointment.
Do Floaters Go Away on Their Own?
Floaters don’t usually dissolve or disappear. What happens instead is that your brain learns to ignore them. Over weeks to months, most people stop noticing floaters that initially seemed very distracting. The floaters may also settle lower in the eye, drifting out of your central line of sight.
For the majority of people, no treatment is needed. The floaters become part of the background, and they stop interfering with daily life. But for a small percentage, floaters remain large, dense, or centrally located enough to genuinely affect vision and quality of life. Those cases have treatment options.
Treatment for Persistent Floaters
Laser Treatment
A procedure called YAG laser vitreolysis uses short pulses of laser energy to break apart or vaporize floaters inside the eye. In a randomized trial of 52 eyes, patients who received the laser showed significant improvement in symptoms, visual disturbances, and vision-related quality of life compared to a control group at six months. The laser doesn’t improve the sharpness of your vision on an eye chart, but it reduces the visual disruption floaters cause. Serious complications were rare in the study, though the procedure is still relatively new and larger long-term studies are ongoing.
Surgery
For severe cases, a procedure called vitrectomy removes some or all of the vitreous gel and replaces it with a salt solution. This is the most effective option: in one long-term study, floater symptoms resolved in 98.5% of treated eyes. Modern techniques using smaller instruments and a more conservative approach have significantly improved safety. In that same study, none of the 66 eyes developed retinal tears, bleeding, infection, or glaucoma over a follow-up period of three months to four years.
The main trade-off is cataract formation. About 19% of patients with natural lenses needed cataract surgery afterward, on average about 16 months later. That rate is considerably lower than older surgical techniques, which caused cataracts in roughly half of patients. Vitrectomy is typically reserved for people whose floaters significantly impair their daily functioning, since it is still eye surgery with real recovery time.
Who Gets Floaters Most Often
Floaters become increasingly common with age, particularly after 50. People who are significantly nearsighted tend to develop them earlier because their eyes are longer, which causes the vitreous to degenerate faster. Anyone who has had cataract surgery, an eye injury, or inflammation inside the eye is also at higher risk. Diabetic eye disease can cause floaters too, though these are typically from small bleeds inside the eye rather than from collagen clumps.
If you’ve always had a few small floaters that haven’t changed much, that’s normal. The time to pay close attention is when something changes: a sudden increase in number, a new large floater, flashes of light, or any loss of vision.