Those squiggly, drifting shapes in your vision are called eye floaters, and they’re extremely common. They look like tiny threads, cobwebs, rings, or translucent worms that drift when you move your eyes and seem to dart away when you try to look directly at them. Most of the time, they’re completely harmless.
What Floaters Actually Are
Your eye is filled with a gel-like substance called the vitreous. It’s mostly water, but it gets its structure from a network of collagen fibers and a sugar molecule that holds everything together. Over time, those collagen fibers start to clump and form tiny strings or knots. When light enters your eye, these clumps cast small shadows on the retina (the light-sensitive layer at the back of your eye), and your brain registers those shadows as the squiggly shapes you see floating around.
This clumping process is driven partly by light exposure itself. Visible light hitting the vitreous over a lifetime generates free radicals that create cross-links between collagen molecules. At the same time, the gel gradually liquefies and shrinks. Picture a block of gelatin slowly breaking down: some parts become watery while the remaining solid bits float around in the liquid. That’s essentially what’s happening inside your eye.
Why They Show Up More With Age
Floaters can appear at any age. Surveys of younger adults find that roughly 75% of people report seeing them. But the type and severity of floaters tend to change as you get older, particularly after age 50.
As the vitreous continues to shrink and liquefy, it eventually pulls away from the back wall of the eye entirely. This process, called posterior vitreous detachment (PVD), happens in stages. It starts with a partial separation near the center of the retina and progresses until the gel fully detaches from both the central retina and the optic nerve. When the vitreous peels away from the optic nerve, it can leave behind a ring-shaped floater (sometimes called a Weiss ring) that’s larger and more noticeable than the fine threads people see earlier in life.
PVD is a normal part of aging and happens to most people eventually. It often brings a sudden burst of new floaters, which is why many people in their 50s, 60s, and 70s notice a dramatic increase seemingly out of nowhere.
Who Gets Them Earlier
Several factors can accelerate the breakdown of the vitreous gel. Nearsightedness is one of the biggest. If you’re nearsighted, your eyeball is physically longer than average, which stretches the vitreous and makes it more prone to early liquefaction and detachment. Other risk factors include previous eye injuries, cataract surgery, eye inflammation, and diabetic retinopathy (damage to the retinal blood vessels from poorly controlled blood sugar).
When Floaters Signal Something Serious
The vast majority of floaters are benign. But in some cases, the vitreous pulls hard enough on the retina as it detaches to tear it. A retinal tear, left untreated, can progress to a retinal detachment, which is a medical emergency that can cause permanent vision loss.
The warning signs to watch for are specific and distinct from ordinary floaters:
- A sudden shower of new floaters, especially many small dots rather than a few squiggly lines
- Flashes of light in your peripheral vision, like a camera flash or lightning bolt, often more noticeable in the dark
- A shadow or curtain creeping across part of your visual field from any direction
- A sudden decrease in vision
Any of these warrants an urgent eye exam, ideally the same day. One or two new floaters that drift in slowly over weeks are a different story. They’re almost always just another collagen clump catching the light.
Do Floaters Go Away on Their Own?
Floaters don’t typically dissolve. The collagen clumps remain in the vitreous. However, two things happen that make them less noticeable over time. First, they tend to settle lower in the eye, drifting out of your central line of sight. Second, your brain gradually learns to tune them out. This process, called neuroadaptation, is the same mechanism that lets you stop noticing the feel of your clothes on your skin or background noise in a room. For most people, floaters that are very distracting at first become much less bothersome within weeks to months.
Treatment Options for Persistent Floaters
Most floaters don’t need treatment. But for people whose floaters are large, dense, or positioned in a way that genuinely interferes with reading, driving, or daily life, there are two main options.
Laser Treatment
A procedure called YAG laser vitreolysis uses short bursts of laser energy to break up or vaporize the collagen clumps. It’s done in an office setting and doesn’t require surgery. In studies, about 57% of patients experienced a 50% or greater improvement in their symptoms, with no cases of retinal tears or detachment as a complication. Some earlier, smaller studies reported improvement rates as high as 73%. It works best on large, well-defined floaters that sit away from the retina and lens. Fine, scattered floaters are harder to target.
Vitrectomy Surgery
For severe cases, a surgical procedure can remove the vitreous gel entirely and replace it with a saline solution. This is highly effective at eliminating floaters, but it’s a real surgery with real risks, including cataract formation, infection, and retinal detachment. Because of those risks, it’s reserved for people who have had bothersome floaters for at least three months and whose daily functioning is significantly affected. For people with mild or moderate floaters, the risks outweigh the benefits.
A Less Common Lookalike
There’s a separate condition called asteroid hyalosis that can look similar to floaters but has a different cause. Instead of collagen clumps, it involves tiny glittering particles made of calcium, phosphorus, and fatty compounds suspended in the vitreous. Under an eye exam, they look like stars in a night sky. Despite looking dramatic to an eye doctor, asteroid hyalosis rarely causes significant vision problems and almost never requires treatment. If your eye doctor mentions it during an exam, it’s typically an incidental finding.
Living With Floaters
A few practical things can help while your brain adjusts. Floaters are most visible against bright, uniform backgrounds like a blue sky, a white wall, or a computer screen. Reducing screen brightness or using a dark-mode setting can make them less conspicuous. Sunglasses help outdoors for the same reason. When a floater drifts into your central vision, moving your eyes quickly up and down (or side to side) can shift the vitreous fluid and sweep the floater out of the way temporarily.
For most people, floaters are a minor visual nuisance that fades into the background with time. They’re one of those things the body does as it ages that seems alarming the first time you notice it but turns out to be completely ordinary.