Eye Floaters

Overview

Eye floaters are tiny specks, dots, squiggles, threads or cobweb shapes that seem to drift across your vision. They are not in the air in front of you; they are inside your eye. The eye is filled with a clear, jelly-like substance called the vitreous (say: VIT-ree-us). As we age, small clumps or strands can form in this jelly, and they cast tiny shadows on the light-sensitive layer at the back of the eye (the retina). Those shadows are what you see as floaters. They often seem to move away when you try to look straight at them, because they float in the eye fluid.

Yes, floaters are extremely common. Many adults notice them at some point, and they become more common as people get older. Most are a normal part of how eyes change with age.

Anyone can get floaters, but they are more likely in people over about 50, people who are short-sighted (need glasses to see things far away), people who have had eye surgery such as cataract surgery, people who have had an eye injury, and people with diabetes or inflammation inside the eye.

Symptoms

Common symptoms

• Small specks, dots, circles, lines, threads or cobweb shapes drifting in your vision
• Shapes that seem to move when you move your eyes and dart away when you try to look directly at them
• Floaters that are easiest to see against a plain, bright background such as a white wall, a screen or the sky
• One floater or several, often in the same eye, that may look slightly different over time

Symptoms in children

• Floaters are uncommon in young children, and children often do not notice or describe them
• A child who says they see spots, shadows, 'bugs' or flashing lights, or who starts rubbing one eye or squinting, should be checked by a doctor or eye specialist
• Any sudden change in a child's vision, or a child who cannot see well out of one eye, needs prompt assessment

Symptoms in older adults

• Floaters become more common with age as the jelly inside the eye shrinks and forms clumps
• A common age-related change called posterior vitreous detachment (the jelly pulling away from the back of the eye) often causes a sudden new floater plus flashes of light
• Floaters can also appear or become more noticeable after cataract surgery
• New or changing floaters in later life deserve a proper eye check, because the risk of a retinal tear is higher

Causes

Main causes

• Normal age-related changes: the vitreous jelly slowly shrinks and forms tiny clumps or strands that cast shadows on the retina
• Posterior vitreous detachment: the jelly pulls away from the back of the eye, often causing a new floater and flashes of light
• Being short-sighted, which makes the eye longer and the vitreous more likely to change early
• Bleeding inside the eye, which can happen with diabetes or after an injury
• Inflammation inside the eye (called uveitis), which can cause cells or clumps to float in the jelly
• A retinal tear or detachment, where the retina is pulled or lifted away from the back of the eye
• Eye surgery, such as cataract surgery, or a previous eye injury

Risk factors

• Being over about 50 years old
• Being short-sighted (myopia)
• Having had cataract surgery or other eye surgery
• A previous eye injury or infection
• Diabetes, especially if blood sugar has been high over time
• Inflammation inside the eye or a history of uveitis
• In rare cases, family history of retinal problems

When to see a doctor

See a doctor urgently if:

• You suddenly get lots of new floaters, or the number of floaters jumps quickly
• You see new flashes of light, sparks or lightning streaks
• A dark shadow, curtain or veil appears in part of your vision
• Your vision suddenly becomes blurred or lost in one eye
• You have eye pain, redness or light sensitivity along with floaters
• New floaters or flashes start after an eye injury or eye surgery

Book a routine appointment if:

• You have had floaters for a while and they are becoming annoying or affecting reading, driving or work
• You are not sure whether your floaters have changed
• You have diabetes and notice any change in your vision
• You simply want reassurance about floaters you have noticed

Diagnosis

A doctor or optometrist will ask about your floaters, when they started, whether they have changed, and whether you have flashes or shadows. They will then examine your eyes, usually using special eye drops to widen (dilate) your pupils so they can look at the back of your eye clearly. This lets them check the retina for tears, holes or detachment and look at the vitreous jelly.

Tests that may be done

• A vision (eyesight) test, checking each eye separately
• Dilated eye exam: drops are put in your eyes to widen the pupil, and the doctor looks inside with a bright light and magnifying lenses
• Slit-lamp examination, which uses a special microscope to look at the front and inside of the eye
• Sometimes an ultrasound scan of the eye (B-scan), if the view inside is blocked, for example by bleeding
• Sometimes photographs or a scan of the retina (such as OCT) to check the back of the eye in more detail

What to expect at your appointment

The eye drops used to widen your pupils can make your vision blurry and your eyes sensitive to light for a few hours. You may find it hard to read or drive afterwards, so it helps to arrange for someone to travel home with you. The examination itself is usually quick and not painful, although the bright light can feel uncomfortable for a moment.

Treatment

In most cases, no treatment is needed. Floaters are usually harmless, and your brain gradually learns to filter them out. The most helpful thing is often to have your eyes checked once to make sure everything is fine, and then to give yourself time to adjust. If floaters are caused by a retinal tear, that does need treatment, which is why a sudden change in symptoms matters.

Self-care at home

• Try moving your eyes up and down or side to side; this shifts the floaters away from the centre of your vision for a while
• Look at plainer backgrounds when you need to concentrate, and adjust lighting so it is comfortable rather than glaring
• Use sunglasses in bright light if floaters seem more obvious outdoors
• Reduce screen brightness or increase text size if floaters make reading harder
• Keep a simple note of when you first noticed them and whether anything has changed, so you can tell your eye care professional
• Try not to keep chasing the floaters with your eyes, as this can make you notice them more

Medical treatments

There is no medicine, drop or supplement that reliably removes floaters, so treatment is not usually offered for ordinary floaters. If floaters are caused by an underlying problem, such as inflammation, bleeding from diabetes, or a retinal tear, the eye specialist will treat that underlying cause. In selected cases, some eye clinics offer a procedure using a focused laser to try to break up large floaters, but this is not suitable for everyone and is not widely available. Any decision about treatment should be made with an eye specialist who can explain the benefits and risks for your eyes.

When is surgery considered?

Surgery is rarely needed for floaters. In a small number of people with very large or dense floaters that seriously affect daily life, an eye specialist may discuss a procedure called vitrectomy, where the jelly inside the eye is removed and replaced with a clear fluid. This is a significant operation with real risks, including infection, bleeding, retinal detachment and faster cataract formation, so it is only considered after careful discussion. For most people, the risks of surgery outweigh the annoyance of floaters, and simply monitoring with regular eye checks is the better option.

Living with this condition

Floaters can be irritating, especially at first, but most people find they notice them less over time. Simple tricks, like shifting your gaze or using a plain background when reading, can help in the moment. Keep an eye on any changes: a sudden increase in floaters or new flashes is the main thing to watch for, and it is worth knowing the signs so you can act quickly if they happen.

Lifestyle tips

• Have regular eye tests as advised by your optometrist, and mention your floaters at each check
• If you have diabetes, keep your blood sugar, blood pressure and cholesterol as well controlled as possible, as this protects the eyes
• Wear protective eyewear for DIY, sports or work that could injure your eyes
• Take breaks from screens and use good lighting to reduce eye strain
• Avoid rubbing your eyes hard
• Get enough sleep and stay hydrated, which helps your eyes feel comfortable

Diet and exercise

There is no special diet that gets rid of floaters, and no food or supplement has been proven to clear them. Eating a balanced diet rich in fruit and vegetables, and staying active, is good for your general health and for your circulation, which supports healthy eyes. If you have diabetes, following your agreed eating and activity plan matters most for protecting your sight. Always check with your doctor or pharmacist before starting any new supplement, especially one marketed for eye health.

Mental health and emotional wellbeing

It is very common to feel anxious when you first notice floaters, particularly if you have heard they can be linked to eye problems. Most floaters are harmless, and anxiety usually settles once you have had a proper eye check and know what to watch for. If floaters are affecting your mood, sleep or ability to concentrate, or if worry about your eyes is becoming constant, talk to your doctor. Support is available, and you do not have to cope alone. If you ever feel overwhelmed or have thoughts of harming yourself, contact your local emergency services or a crisis support line in your country straight away.

Prevention

Most floaters cannot be prevented, because they come from natural age-related changes inside the eye. What you can do is protect your eyes and catch problems early: have regular eye tests, manage conditions like diabetes well, wear eye protection when needed, and act quickly if your floaters suddenly change.

Screening programmes

Routine eye tests are the best form of screening. In the UK, NHS eye tests are available, and free tests are offered to certain groups, such as people with diabetes or a family history of glaucoma. People with diabetes are usually offered regular diabetic eye screening. Ask your optometrist or doctor how often you should be checked.

Complications

If left untreated

• Most floaters cause no complications at all and simply become less noticeable
• If floaters are caused by an untreated retinal tear, the retina can detach, which can lead to permanent vision loss if not treated quickly, which is why sudden new floaters or flashes need urgent attention
• Bleeding inside the eye or inflammation can cause lasting problems if the underlying cause is not treated
• In some people, large floaters can make reading, driving or detailed work harder, even when the eye itself is healthy

Long-term outlook

The outlook for most people with floaters is very good. They are usually a harmless nuisance that becomes easier to live with over time. Even if you need an eye check or treatment for a retinal problem, seeing an eye specialist early gives the best chance of protecting your sight. Most people find that within a few months they think about their floaters far less than they did at the start.

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