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Eye Floaters and Flashes in Singapore: Harmless or Emergency?

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Eye Floaters and Flashes in Singapore

Written & reviewed by the BestDoctors.sg editorial team · Last updated 2 Jul 2026 · General information, not medical advice

Quick answer. Occasional eye floaters (small specks, dots or cobweb shapes drifting across your vision) are very common and usually harmless, becoming more likely with age and in short-sighted (myopic) people. BUT a sudden shower of new floaters, new flashes of light, or a dark shadow or “curtain” moving across part of your vision can signal a retinal tear or retinal detachment – a sight-threatening EMERGENCY that needs urgent, same-day eye assessment. An ophthalmologist checks the back of the eye with a dilated retinal exam; a tear can often be sealed with laser and a detachment treated with surgery. Do not wait for these symptoms to settle.

Most people notice tiny specks, threads or cobweb-like shapes drifting across their vision from time to time – these are floaters, and they are usually harmless changes in the gel inside the eye. Occasionally, though, new floaters and flashes are the first warning of a retinal tear or detachment, which can permanently damage sight if not treated quickly. This guide explains what floaters and flashes are, who is more at risk in Singapore, and – most importantly – the red-flag symptoms that mean you should be seen by an eye doctor the same day.

At a glance

Floaters and flashes: symptoms and what to do
Symptom Likely meaning What to do
A few floaters you have had for a long time, stable Usually harmless vitreous changes Routine – mention at your next eye check
New floaters or flashes that came on gradually, no shadow Often posterior vitreous detachment (PVD) See an eye doctor soon (within days) for a dilated retinal exam
Sudden shower of many new floaters Possible retinal tear or detachment Urgent same-day eye assessment – do not wait
New, frequent or persistent flashes of light Vitreous tugging on the retina; possible tear Urgent same-day eye assessment
Dark shadow, veil or "curtain" across part of vision Likely retinal detachment – an emergency Go to an eye A&E / emergency eye service immediately
Sudden loss or blurring of part of your vision Retinal detachment or other serious cause Emergency – seek immediate eye care

What are floaters and flashes?

Floaters are small shapes – specks, dots, lines, rings or cobwebs – that drift across your field of vision and seem to dart away when you try to look at them. They are most obvious against a bright, plain background such as a clear sky or a white wall. Floaters are shadows cast on the retina by tiny clumps in the vitreous, the clear gel that fills the inside of the eye. As the vitreous gel ages it liquefies and forms these clumps, so floaters become more common with age.

Flashes are brief sparks, arcs or lightning-like streaks of light, often seen at the edge of vision and more noticeable in the dark. They happen when the vitreous gel tugs on the light-sensitive retina, which the brain interprets as a flash of light.

When floaters and flashes are usually harmless

Occasional floaters are extremely common and, on their own, are usually nothing to worry about. They tend to become more frequent with age, and earlier and more often in people who are short-sighted (myopic) – relevant in Singapore, where myopia is very common.

A frequent and usually benign cause of new floaters and the odd flash is posterior vitreous detachment (PVD) – the age-related process where the vitreous gel separates from the retina. Many people over 50 develop PVD. In most cases the gel peels away cleanly, the retina stays intact, and symptoms settle over weeks to months as the brain learns to ignore the floaters. Importantly, however, the only way to be sure a PVD has not caused a retinal tear is an eye examination – so new symptoms still need to be checked.

Red flags: when it is an emergency

See an eye doctor urgently – the same day – or go to an eye Accident & Emergency department if you notice any of the following, which can mean a retinal tear or retinal detachment:

  • A sudden increase or shower of many new floaters
  • New flashes of light, especially if frequent or persistent
  • A dark shadow, veil or “curtain” coming across part of your vision
  • Sudden loss of vision or a sudden blurring of part of your sight

A retinal detachment is a medical emergency. Crucially, it is usually painless – the absence of pain does not mean it is safe. The longer a detachment is left, the lower the chance of saving full vision, so do not wait to see if it improves on its own.

Who is at higher risk?

You are more likely to develop a retinal tear or detachment if you:

  • Are highly short-sighted (high myopia) – the retina is thinner and more prone to tearing
  • Are over about 40, when PVD becomes more common
  • Have had cataract or other eye surgery
  • Have had an eye injury or trauma
  • Have a personal or family history of retinal detachment

In Singapore, retinal detachment is estimated to affect roughly 10 people per 100,000 each year. Despite Singapore’s very high myopia rates, it remains relatively uncommon – in part because accessible, high-quality eye care allows early detection and treatment.

How the eye is examined

If you have new floaters or flashes, an ophthalmologist will perform a dilated retinal examination: eye drops are used to widen the pupil so the entire retina, including its outer edges, can be inspected in detail. This is the key test to find or rule out a retinal tear or detachment. Occasionally an ultrasound scan of the eye is used if the view is obscured. This is why new or sudden symptoms should always be assessed in person rather than over the phone.

How retinal tears and detachments are treated

The good news is that, caught early, these conditions are treatable:

  • Retinal tear (no detachment yet): prompt laser treatment (or sometimes freezing therapy) seals around the tear to create scar tissue and prevent it progressing to a detachment. This is ideally done quickly – often within a day.
  • Retinal detachment: requires surgery, such as vitrectomy, scleral buckling or pneumatic retinopexy, usually performed urgently. With modern techniques, around 90% of detachments are successfully reattached with one operation, though some need a further procedure.

Outcomes are best when treatment happens before the central (macular) vision is affected – another reason early review matters.

Related guides

Sources

Last updated 21 June 2026. Prices are typical market ranges gathered from the cited sources and vary by clinic, doctor and individual case — they are not quotes. This guide is general information, not medical advice; always consult a qualified, MOH-accredited doctor before any treatment.

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Frequently asked questions

Are eye floaters dangerous?

Most floaters are harmless and simply reflect normal ageing of the gel inside the eye, especially in short-sighted people. They become a concern when there is a sudden increase in floaters, new flashes of light, or a dark shadow across the vision - these can signal a retinal tear or detachment and need urgent eye assessment.

What is the difference between harmless flashes and dangerous ones?

Flashes happen when the vitreous gel pulls on the retina, and a single PVD can cause occasional flashes that settle. However, new, frequent or persistent flashes - particularly together with a shower of new floaters or a shadow in your vision - may mean the retina is being torn and require same-day examination. Because there is no easy way to tell at home, any new flashes should be checked.

Can floaters and flashes go away on their own?

Floaters from a posterior vitreous detachment often become less noticeable over weeks to months as the brain learns to ignore them, and occasional flashes may stop once the gel finishes separating. This only applies once an eye doctor has confirmed there is no retinal tear or detachment. Never assume worsening or new symptoms will simply settle.

Does a retinal detachment hurt?

No - retinal tears and detachments are usually painless. The lack of pain is exactly why people delay seeking help. Judge urgency by the visual symptoms (sudden floaters, flashes, a curtain or shadow, vision loss), not by whether the eye hurts.

I'm very short-sighted in Singapore - should I be worried about floaters?

High myopia is common in Singapore and does raise the risk of retinal tears and detachment because the retina is thinner. This does not mean every floater is an emergency, but it is a good reason to have any sudden new floaters, flashes or shadows checked promptly, and to keep up with regular eye examinations.

Who should I see for sudden floaters and flashes?

You need an ophthalmologist (eye specialist) who can perform a dilated retinal examination. For sudden new floaters, flashes, a curtain across the vision or vision loss, seek urgent same-day review - through an eye specialist's urgent slot, a polyclinic referral to an eye centre, or an eye Accident & Emergency service. Do not wait days for a routine appointment.