Why do I see floaters in my vision?

A tiny dark speck drifts across your vision. You look toward it, but it seems to move away. Then another one appears when you glance at a bright wall or the blue sky. These shapes are called eye floaters, and they can be distracting even when your vision is otherwise clear.

Eye floaters are often related to normal changes inside the eye as you age. However, a sudden increase in floaters, especially with flashes of light or a dark shadow, can signal a retinal problem that needs urgent attention.

What are eye floaters?

Eye floaters are small spots, threads, or cobweb-like shapes that seem to drift through your field of vision. They may look like tiny dots, curved lines, or transparent strands. You might notice them most clearly against a bright, plain background.

Although they appear to be in front of your eyes, floaters usually come from inside the vitreous, the clear gel that fills most of the eyeball. Small clumps or strands within this gel cast shadows on the retina, the light-sensitive tissue at the back of the eye. Your brain interprets those shadows as floating shapes.

Why do eye floaters appear?

Age-related changes in the vitreous are the most common reason floaters develop. As the gel gradually becomes more liquid and shrinks, collagen fibers can gather into small clumps. These clumps cast shadows that become visible as floaters.

This process can lead to a condition called posterior vitreous detachment (PVD). In PVD, the vitreous pulls away from the retina. It is not the same as retinal detachment, and it often happens as part of aging. However, the pulling force can sometimes create a retinal tear, which is why new floaters deserve attention.

Other factors can also contribute. People with significant nearsightedness may experience vitreous changes earlier. Inflammation inside the eye can introduce cells into the vitreous, while bleeding from conditions such as diabetic retinopathy may cause dark spots or cloudy areas. Previous eye surgery or an eye injury can also be relevant.

When should eye floaters worry you?

The most important clue is a sudden change. A few stable floaters that have been present for a long time are different from a new shower of spots that appears over a short period.

Pay particular attention to these warning signs:

1. A sudden increase in floaters

A sudden burst of new spots, dots, or cobweb-like shapes may occur when the vitreous pulls on the retina. It can also be associated with bleeding inside the eye. Arrange an urgent eye evaluation rather than waiting to see whether the spots disappear.

2. Flashes of light

Brief flashes, often near the edge of your vision, can happen when the vitreous pulls on or stimulates the retina. New flashes combined with new floaters may indicate a retinal tear. The symptoms do not prove that a tear is present, but they need prompt assessment.

3. A shadow or curtain in your vision

A dark shadow, gray area, or curtain moving across part of your vision is especially concerning. It can be a sign of retinal detachment, which may cause permanent vision loss without timely treatment. Seek emergency eye care immediately, even if your eye does not hurt.

Sudden blurred vision or a noticeable loss of peripheral vision also deserves urgent attention. Do not drive yourself if your sight is significantly affected.

How are new floaters checked and treated?

An eye doctor will usually examine the inside of your eye, often using dilating drops to get a better view of the retina. This exam helps identify a retinal tear, bleeding, or detachment that may not be visible during a basic vision check.

If a retinal tear is found, laser treatment or freezing treatment may help seal the area and reduce the risk of retinal detachment. If the retina has already detached, surgery may be needed.

When floaters are caused by ordinary age-related changes and the retina is healthy, treatment is usually unnecessary. They may become less noticeable over time as your brain adapts, although they do not always disappear completely. Procedures to remove persistent floaters are reserved for selected cases because they carry risks.

If you want to understand other sudden changes in sight, our guide to sudden blurry vision and what to do next explains why some vision changes should not be ignored.

For broader information about maintaining your eye health and making informed care decisions, explore our Vision & Eye Health resources.

FAQs about eye floaters

Do eye floaters go away on their own?

Some floaters become less noticeable as your brain adapts to them. Others remain visible for years. A new or sudden change should still be checked, even if it later seems to improve.

Are eye floaters more common as you get older?

Yes. Changes in the vitreous become more common with age, making floaters more likely. They can also occur in younger people, particularly those with significant nearsightedness or certain eye conditions.

Can eye floaters cause blindness?

Ordinary age-related floaters do not usually cause blindness. However, floaters caused by a retinal tear or retinal detachment may signal a sight-threatening problem that requires urgent care.

Conclusion

Eye floaters are often a normal result of changes in the vitreous, but their pattern matters. New floaters, flashes of light, or a curtain-like shadow should never be dismissed as ordinary aging. A prompt dilated eye exam can help identify a retinal problem before more vision is lost.

References

1. American Academy of Ophthalmology – What Are Floaters and Flashes?
2. National Eye Institute – Retinal Detachment
3. Mayo Clinic – Eye Floaters: Symptoms and Causes