Have you ever noticed small, shadowy specks, threads, or cobweb-like shapes drifting across your field of vision—especially when staring at a bright sky or a white wall? If so, you’re not alone. These visual disturbances are called eye floaters, and they’re a common experience, especially as we age. But while they’re often harmless, sometimes they can be a sign of a more serious eye issue.
We spoke with Dr. Karen Li, a board-certified ophthalmologist, to understand what floaters are, what causes them, and what you should do if they suddenly appear.
What Exactly Are Eye Floaters?
“Floaters are tiny clumps of cells or strands of collagen inside the vitreous humor—the gel-like substance that fills the back of your eye,” explains Dr. Li. “As light passes through the eye, these clumps cast shadows on the retina, which is what you see as floaters.”
They often appear as:
- Black or gray specks
- Thread-like strands
- Cobwebs or squiggly lines
- Moving spots that drift when you move your eyes
Floaters are more noticeable when looking at bright, uniform backgrounds, like a blue sky or a white screen.
What Causes Floaters?
Floaters are usually a normal part of the aging process. As we get older, the vitreous gel in the eye starts to liquefy and shrink, a process known as vitreous detachment. “When this happens, collagen fibers in the gel can clump together, creating floaters,” Dr. Li says.
Other potential causes include:
- Myopia (nearsightedness) – People with severe nearsightedness are more prone to floaters.
- Eye trauma or injury
- Eye surgeries like cataract removal
- Inflammation in the eye (posterior uveitis)
- Bleeding in the eye due to diabetic retinopathy or injury
When Are Floaters Harmless?
In most cases, floaters are benign and require no treatment. “If you’ve had a few floaters for years and they haven’t changed or increased, there’s usually no cause for concern,” says Dr. Li.
However, if floaters suddenly appear or drastically increase in number, that’s when you need to pay attention.
Warning Signs You Shouldn’t Ignore
Floaters can sometimes be a sign of a more serious eye condition, especially when accompanied by other symptoms. According to Dr. Li, you should seek immediate medical attention if you notice:
- A sudden increase in the number or size of floaters
- Flashes of light in your peripheral vision
- A dark curtain or shadow moving across your field of view
- Loss of side vision
These may indicate a retinal tear or retinal detachment, which is a medical emergency. “If left untreated, retinal detachment can lead to permanent vision loss,” warns Dr. Li.
What to Do If You Start Seeing Floaters
If you suddenly start noticing floaters for the first time or see a significant change, here’s what Dr. Li recommends:
- Don’t panic – A few floaters are common and not necessarily dangerous.
- Monitor your symptoms – Take note of any new floaters, flashes, or changes in vision.
- Schedule an eye exam – Even if it’s not an emergency, it’s smart to get checked by an eye doctor to rule out serious conditions.
- Seek emergency care if needed – If you have flashes, a shadow over your vision, or rapid changes, go to an emergency room or ophthalmologist immediately.
Can Eye Floaters Be Treated or Removed?
For most people, floaters are a minor annoyance that becomes less noticeable over time. “Your brain usually adapts and learns to ignore them,” says Dr. Li.
In rare cases, if floaters are severe and interfere with vision, treatments may include:
- Laser therapy to break up floaters
- Vitrectomy, a surgical procedure to remove the vitreous gel (usually only recommended in extreme cases)
How to Keep Your Eyes Healthy
While you can’t always prevent floaters, you can reduce your risk of serious eye issues by maintaining good eye health:
- Get regular eye exams, especially if you’re over 40 or have vision problems
- Protect your eyes from injury by wearing safety glasses when needed
- Manage chronic conditions like diabetes and high blood pressure
- Eat a healthy diet rich in antioxidants and omega