Why you might see floaters and when to worry about them
Floaters are small spots, threads, squiggles or cobweb-like shapes that seem to drift across your vision. They may be easiest to notice against a bright sky, a white wall or a computer screen. Many are harmless changes inside the eye, but a sudden increase in floaters can sometimes signal a retinal problem that needs prompt attention.
For people in Australia, a new visual disturbance may appear during a drive along the Hume Highway, after a day at the beach, or while working outdoors under a clear Queensland or South Australian sky. Knowing the difference between a familiar floater and a warning sign can help you decide whether to arrange a routine eye test, contact an optometrist urgently or attend an emergency department.
What floaters look like
Floaters are often described as tiny black dots, translucent circles, wispy strands, insects or drifting cobwebs. They move when your eyes move, then seem to lag behind as your gaze stops. Looking directly at one can make it disappear because the floater is suspended within the eye rather than sitting on the surface of your vision.
Most floaters come from the vitreous, a clear, gel-like substance filling the space between the lens and retina. With age, the vitreous gradually becomes less firm and can develop clumps or strands. Light passing through the eye casts shadows from these structures onto the retina, creating the appearance of moving spots.
A stable floater that has been present for months or years is commonly less concerning, particularly if it has not changed and your vision remains clear. Even so, an eye examination is worthwhile when floaters are new, troublesome or difficult to distinguish from other visual symptoms.
Why they appear
Age-related vitreous changes are the most common explanation. The gel can slowly shrink and pull away from the retina in a process called posterior vitreous detachment. This is frequent in later adulthood, although it can occur earlier in people who are very short-sighted, have had cataract surgery or experienced an eye injury.
Floaters can also follow inflammation inside the eye, bleeding into the vitreous or a tear in the retina. A retinal tear may allow fluid underneath the retina and lead to retinal detachment, which can threaten sight. Less commonly, migraine-related visual symptoms produce shimmering patterns or zigzags, although these usually affect a wider area and last for a limited period.
An eye health professional can separate these possibilities through a dilated retinal examination and, where appropriate, retinal imaging. Practices such as Kramer Family Eyecare use detailed diagnostic assessment to look beyond the front of the eye and evaluate the retina and surrounding structures.
Signs that need urgent attention
Seek same-day eye care if you suddenly notice many new floaters, a shower of black dots or repeated flashes of light. Flashes can happen when the vitreous pulls on the retina. They may look like brief streaks, sparks or lightning at the edge of your vision, especially in a dark room.
A dark curtain, grey veil, missing section of vision or rapidly worsening blur is an emergency warning sign. So is a sudden loss of side vision, significant eye pain with visual change or new symptoms after an impact. These signs can occur with retinal detachment, retinal bleeding or other conditions that require rapid treatment.
In Australia, contact an optometrist or ophthalmologist urgently, or attend the nearest emergency department if prompt eye care is unavailable. Healthdirect, available on 1800 022 222, can provide general health guidance, but a phone assessment should not delay emergency care when vision is suddenly changing. Do not drive yourself if your sight is impaired.
How an eye examination works
An optometrist will ask when the floaters began, whether they are increasing and whether you have flashes, blurred vision, pain or a curtain-like shadow. They may check visual acuity, eye pressure, peripheral vision and the front of the eye before using dilating drops to examine the retina.
Dilation can make your eyes light-sensitive and blur near vision for several hours. Bring sunglasses, arrange transport if needed and avoid planning detailed screen work immediately afterwards. A dilated examination is particularly important when symptoms are recent because a retinal tear can be small and painless.
Retinal photography or optical coherence tomography may add useful information, although imaging does not replace a carefully performed clinical examination. If the view is blocked by blood or a dense cataract, referral to an ophthalmologist and further testing may be necessary.
Who has a higher risk
The likelihood of vitreous or retinal problems rises with age, short-sightedness, previous cataract surgery and a personal or family history of retinal detachment. A previous eye injury, inflammation or eye operation also matters. Tell the clinician about these factors, even if the current floater seems minor.
People with diabetes need regular retinal monitoring because changes in small blood vessels can cause bleeding and new floaters. High blood pressure and blood-thinning medicines may also be relevant to the assessment, although prescribed medicines should never be stopped without medical advice.
Bright Australian sunlight does not directly create ordinary vitreous floaters, but it can make them easier to notice. Proper UV protection still matters: wear sunglasses that meet Australian standards, use a broad-brimmed hat and protect children’s eyes during long days outdoors. Tradies, farmers, gardeners and athletes should also use suitable protective eyewear to reduce injury risk.
Monitoring and treatment options
If the examination shows ordinary age-related floaters without a retinal tear or other disease, treatment may not be needed. The brain often becomes less aware of them over time. Moving your eyes gently or changing the background may make a floater less distracting, but there is no proven eye exercise, supplement or home remedy that dissolves it.
A retinal tear may be treated with laser or a freezing procedure to create a seal around the affected area. Retinal detachment generally requires ophthalmic surgery, with the approach depending on the location and extent of the detachment. Fast assessment can preserve more vision, which is why waiting to see whether symptoms settle is unsafe when warning signs are present.
For persistent, severe floaters that interfere with reading, driving or work, an ophthalmologist may discuss vitrectomy or, in selected cases, laser treatment. These procedures have risks and are not appropriate for ordinary mild floaters. The decision depends on the examination findings, the effect on daily life and the balance between possible benefit and complications.
Protecting your vision day to day
Routine eye examinations help identify retinal disease, glaucoma, diabetic changes and other problems before symptoms become obvious. Adults should follow the schedule recommended for their age and risk factors. Children, people with diabetes and those with a strong family history may need more frequent checks.
Simple habits support safer eye care. Keep your glasses clean, use protective eyewear for tools and contact sports, manage diabetes and blood pressure, and avoid rubbing an injured eye. When travelling, store spectacles in a hard case rather than loose in a beach bag or car console; these safe glasses storage habits reduce scratches and accidental damage.
The table below summarises how different symptoms are usually approached. It is a guide rather than a diagnosis, since the same description can have different causes in different eyes.
| Visual symptom | Possible explanation | Recommended response |
|---|---|---|
| One or two familiar floaters that have not changed | Age-related vitreous strands or clumps | Mention them at a routine eye examination |
| A sudden shower of new floaters | Vitreous detachment, retinal tear or bleeding | Arrange same-day eye assessment |
| Flashes with new floaters | Traction on the retina or retinal tear | Seek urgent optometry or ophthalmology care |
| Curtain, veil or missing side vision | Possible retinal detachment | Attend an emergency department or urgent eye service immediately |
| Zigzags or shimmering patterns lasting 5–60 minutes | Migraine-related visual aura or another neurological cause | Seek medical advice, especially if it is new or one-sided |
| Floaters with pain, redness or marked light sensitivity | Inflammation, infection or another eye condition | Obtain prompt medical assessment |
A new floater is not automatically dangerous, but a sudden change deserves respect. Note the time it started, whether it affects one or both eyes, and whether flashes, blurred vision or a shadow are present. Arrange urgent assessment for sudden or increasing symptoms, and treat any curtain-like shadow or vision loss as an emergency.