Most floaters are a sign of a healthy eye getting older
Your eye is filled with a clear, gel-like substance called the vitreous humour. As you get older, this gel gradually shrinks and becomes more liquid. Small clumps of protein form within it, and these cast shadows onto the retina at the back of the eye. Those shadows are what you perceive as floaters.
This process is entirely natural. It happens in almost everyone, usually from around the age of 40 onwards, and more so in people who are short-sighted. Floaters move with your eye because they are suspended in the vitreous gel. They drift when your eye is still, and are most visible against a bright sky or a white background.
In the majority of cases, floaters settle with time. The brain adapts remarkably well, and many people stop noticing them altogether within a few weeks or months.
Floaters that have been present for a long time, have not changed, and are not accompanied by any other symptoms are almost always benign. If you have had the same floaters for years, you can be reassured.
These symptoms happen because the gel inside the eye can pull on the retina as it changes with age. In most cases this is harmless, but occasionally it can lead to a tear in the retina, which is why these warning signs matter.
Some symptoms need same-day attention
The retina is a thin layer of tissue lining the back of the eye, responsible for detecting light much like the film in a camera. It can become torn or detached, and floaters are sometimes the first sign that this has happened. A retinal tear or detachment is serious and requires prompt treatment to protect your sight.
If you notice any of the following, contact an urgent eye care service or your optometrist the same day. Do not wait to see if things improve on their own.
- Sudden increase in floaters
- Flashes of light
- A dark shadow or curtain in the vision
- Any loss of vision
These symptoms do not always mean something serious has happened. But they are the signs that the eye needs to be examined urgently. The examination is quick, straightforward, and in most cases reassuring.
Recognising the warning signs of a retinal problem
The overwhelming majority of floaters are harmless
Floaters are one of the most common symptoms seen in eye clinics. In the vast majority of cases, the examination is entirely normal and no treatment is needed.
When a patient is examined, the pupil is dilated with drops so that the peripheral retina can be checked thoroughly. If everything looks healthy, they leave with a clear answer. If a retinal tear is found early, it can be treated quickly and very effectively with a simple laser procedure. The key is acting promptly when you notice the warning signs above.
The floaters themselves, once the retina has been confirmed as intact, do not require treatment in most cases. They tend to become less troublesome with time as the vitreous settles and the brain adapts.
Quick summary
- Most floaters are caused by normal age-related changes in the vitreous gel and are entirely harmless
- They are more noticeable against bright, plain backgrounds and tend to improve over time
- A sudden large increase in floaters always deserves prompt examination
- Flashing lights alongside new floaters need same-day assessment
- A dark shadow or curtain in your vision is urgent, seek help the same day
- If your floaters are long-standing and unchanged, routine monitoring is appropriate
- Most retinal tears, found early, can be treated quickly and effectively
Common questions about floaters
Are floaters dangerous?
In most cases, no. The floaters most people notice are caused by normal changes in the vitreous gel and are entirely harmless. They do not damage the eye or meaningfully affect vision. The situation that requires urgent attention is when floaters appear suddenly, in large numbers, and are accompanied by flashes of light or changes to your field of vision. Those symptoms may indicate a retinal tear, which needs prompt examination.
Can floaters go away?
They can improve, though they rarely disappear entirely. Over time, the vitreous settles, the floaters tend to drift below the line of sight, and the brain becomes very efficient at ignoring them. Most people find that floaters which felt intrusive when they first appeared become far less noticeable within a few months. Surgical treatment to remove floaters exists but carries risks, and is reserved for cases where they are severely affecting quality of life.
Do I need to see an eye doctor?
If your floaters are long-standing, have not changed, and you have no other symptoms, you do not necessarily need an urgent appointment, though it is always reasonable to mention them at a routine eye examination. If your floaters are new, if they appeared suddenly, or if you are experiencing any of the warning signs described above, you should be seen the same day. When in doubt, it is always better to be examined than to wait.
If these symptoms are present, the eye needs to be examined promptly. In most cases the examination is reassuring, but it is important not to delay.
Most floaters are harmless and very common. learn more about when floaters are a normal part of ageing.
Not sure what your floater symptoms mean? Use the quick checker tool to guide your next step.
Try the floaters toolLast medically reviewed: May 2026
