Eye floaters are small shapes that drift across your vision, especially noticeable when you look at a bright sky, white wall, or computer screen. They appear as squiggly lines, threadlike strands, tiny dots, or cobweb-like patches. Floaters are extremely common: surveys suggest roughly 75% of adults have noticed them at some point, even people in their early twenties.
What Causes Floaters
Your eye is filled with a gel-like substance called the vitreous humor. In younger eyes, this gel has a uniform, jelly-like consistency. As you age, the gel gradually breaks down. Water molecules redistribute, creating small pockets of liquid inside the gel. At the same time, microscopic collagen fibers that were evenly spread throughout the vitreous clump together into tiny aggregates.
These clumps of collagen cast shadows on the retina (the light-sensitive tissue at the back of your eye), and those shadows are what you perceive as floaters. The shapes you see correspond to the actual shape of the clump: a long strand of tangled fibers looks like a squiggly line, while a small ball of collagen appears as a dark dot.
A more dramatic version of this process happens when the vitreous pulls away from the retina entirely, something called a posterior vitreous detachment (PVD). This typically occurs in your sixties or seventies and affects most people by their eighties. When the vitreous separates, it can release a sudden shower of new floaters and sometimes cause flashes of light. PVD itself is usually harmless, but it carries a small risk of tearing the retina as the gel peels away.
Who Gets Them
Almost everyone eventually does, but certain factors speed up the process. Nearsightedness (myopia) is the biggest risk factor in younger people. Nearsighted eyes are longer than average, which stresses the vitreous and causes those collagen fibers to aggregate earlier. For people under 40 who are bothered by floaters, myopia is the leading cause.
Age remains the dominant factor overall. The vitreous begins liquefying as early as your forties, and the process accelerates from there. Cataract surgery, eye inflammation, and eye injuries can also trigger earlier vitreous changes and new floaters.
When Floaters Signal an Emergency
A few floaters that have been drifting around for weeks or months are almost always harmless. What matters is sudden change. The warning signs of a retinal detachment include a sudden burst of many new floaters, flashes of light in one or both eyes, or a dark shadow or “curtain” creeping across part of your vision. A retinal detachment is a medical emergency. Without prompt treatment, it can cause permanent vision loss.
The key distinction is speed and volume. One or two new floaters that appear gradually are rarely concerning. Dozens of new floaters appearing over minutes or hours, particularly alongside flashes or a shadow in your peripheral vision, warrant an immediate trip to an eye doctor or emergency room.
How Floaters Are Diagnosed
An eye doctor will dilate your pupils and examine the inside of your eye to check the vitreous and retina. This dilated exam is the standard first step and can reveal whether the vitreous has separated from the retina and whether any retinal tears have formed.
For a more detailed look, ultrasound imaging can map the entire vitreous body. Ultrasound is sensitive enough to detect tiny changes in the density and concentration of collagen clumps throughout the gel. Another imaging tool, optical coherence tomography (OCT), provides detailed views of where the vitreous meets the retina but can’t image the full depth of the vitreous the way ultrasound can.
Do Floaters Go Away on Their Own?
Floaters don’t typically dissolve or disappear, but your brain gradually learns to filter them out. This process, called neuroadaptation, means you stop consciously registering the shadows even though they’re still technically there. The timeline varies from person to person. For many, floaters become far less noticeable within a few months. Some people adapt within weeks, while others remain aware of their floaters for much longer, especially if the floaters are large or centrally located.
Floaters may also physically settle lower in the eye over time, drifting out of your direct line of sight. Between neuroadaptation and gravitational settling, most people who develop new floaters find they’re significantly less bothersome after three to six months.
Treatment Options
Most floaters don’t require treatment. For the minority of people whose floaters seriously interfere with reading, driving, or quality of life, two interventions exist.
Laser Vitreolysis
A specialized laser (called a YAG laser) can break apart large collagen clumps inside the eye. The procedure is done in an office, takes a few minutes, and doesn’t require incisions. About 57% of patients in long-term studies experienced at least a 50% improvement in their symptoms, and none developed retinal tears or detachments as a delayed complication. It works best on single, well-defined floaters that sit a safe distance from the retina and the lens. Diffuse, wispy floaters are harder to target.
Vitrectomy Surgery
Vitrectomy removes the vitreous gel entirely and replaces it with a clear salt solution. It’s the most effective treatment for severe floaters, but it carries real surgical risks. In a large meta-analysis, cataracts developed in about 32% of cases (making this the most common side effect), retinal tears occurred in roughly 3%, and retinal detachment happened in about 1.5%. More serious complications like infection inside the eye were rare, occurring in roughly 0.2% of cases. Because of these risks, vitrectomy is generally reserved for people whose floaters substantially impair daily functioning and who haven’t improved with time or laser treatment.
Living With Floaters
For the vast majority of people, floaters are an annoyance rather than a medical problem. A few practical strategies can reduce how much they bother you. Wearing sunglasses on bright days cuts down on the contrast that makes floaters most visible. Adjusting screen brightness and using dark mode on devices can also help. When a floater drifts into your central vision, shifting your gaze quickly up and then down can move it out of the way, since the fluid inside your eye swirls when you change direction.
If your floaters have been stable for months and your eye doctor has confirmed there’s no retinal damage, the most effective “treatment” is simply giving your brain time to tune them out. Most people eventually reach a point where they only notice their floaters when they think about them or stare at a blank, brightly lit surface.