Overview
The inside of the eye is filled with a clear gel (the vitreous). With age, it shrinks and clumps, casting shadows on the retina that look like floating specks. Floaters are more noticeable against a bright background.
As the gel pulls away from the retina (posterior vitreous detachment), you may see a sudden new floater and flashes. Usually this is harmless, but sometimes it tears the retina, which can lead to retinal detachment and vision loss without quick treatment.
When to get medical care
Causes
Common causes include age-related changes in the vitreous gel and posterior vitreous detachment. Risk is higher with nearsightedness, past cataract surgery, and eye injury. Less common causes include retinal tears and detachment, bleeding in the eye (often from diabetes), and inflammation inside the eye (uveitis).
OwieClear has pages on 4 conditions that can cause floaters or specks drifting in vision. Each shows how soon to get care.
Common causes
- Eye floatersSee a doctor if it doesn't get better
Small specks, threads, or cobwebs that drift across your vision, most noticeable against a bright sky or white wall.
- Bleeding inside the eye (vitreous hemorrhage)May need emergency care
Bleeding into the clear gel inside the eye.
Less likely causes
- Diabetic eye disease (diabetic retinopathy)See a doctor if it doesn't get better
Damage to the blood vessels in the back of the eye from high blood sugar.
- Primary CNS lymphomaOften needs care today
A rare lymphoma that starts in the brain, spinal cord, eyes, or the fluid around the brain.
What you can do at home
- Move your eyes up and down to shift a floater out of view.
- Get a dilated eye exam if floaters are new.
- Know the warning signs of retinal detachment: flashes, a sudden shower of floaters, or a curtain.
- Wear eye protection for sports and work.
Medicines
Most floaters need no treatment and become less noticeable over time. Retinal tears are treated with laser or freezing therapy; detachments need surgery. Rarely, surgery or laser is used for very bothersome floaters.
At the doctor
The eye doctor will look at your retina to rule out a tear.
Questions you may be asked
- When the floaters started
- Flashes of light
- A shadow or curtain
- Nearsightedness, eye surgery, or injury
- Diabetes
The exam
A dilated eye exam.
Tests
- An eye ultrasound if the retina is hard to see
Prevention
You can't prevent most floaters, but you can protect your eyes.
- Wear eye protection
- Control diabetes
- Get regular eye exams
Check your symptoms
Most symptoms have more than one possible cause. The symptom checker looks at all of your symptoms together, plus your age, and shows how soon to get care.
Sources
Last updated 2026-11-13.