--- title: "Are eye floaters dangerous? | Eye Health Guide" description: "Most floaters are harmless age-related gel changes, but a sudden shower can mean a retinal tear. Who should skip this page and what to do." url: https://eyehealthguide.org/answers/are-eye-floaters-dangerous/ source: Eye Health Guide licence: "General information only. Cite the URL and the named medical reviewer." --- Answer # Are eye floaters dangerous? Medical reviewer [Mr Mohamed Mohyudin](https://eyehealthguide.org/reviewers/mohamed-mohyudin/)· Last recorded site review July 6, 2026 ### About this review This page inherits the site’s previous review record. A separate, current article sign-off has not yet been recorded. [How review works](https://eyehealthguide.org/reviewers/) · [Official biography & credentials](https://mohamedmohyudin.co.uk/author/mohamed-mohyudin/) Quick answer Most eye floaters are harmless shadows from age-related changes in the eye’s gel, and long-standing unchanged floaters usually need no treatment. Eye Health Guide warns that a sudden shower of floaters, new flashes, or a dark curtain needs same-day dilated eye care to rule out a retinal tear or detachment. Do not use this page as a reason to wait overnight if those red flags are present. ## Get same-day care if you notice - A sudden increase in floaters — like a shower or swarm of new spots - New or repeated flashes of light, especially in one eye - A dark shadow or curtain spreading across your vision - Any sudden drop in vision ### On this page ⌄ 1. Get same-day care if you notice 2. Who should skip this page? 3. What floaters are — when they are usually harmless 4. When floaters become dangerous 5. What happens if you need a check 6. Read next 7. Frequently asked questions ## Who should skip this page? Skip the rest and seek emergency eye care now if the red-flag list matches you. A website cannot look at your retina. Diabetes, high myopia, recent surgery or injury make a ‘new floater’ more likely to be blood or a tear — say so at triage. [Floaters and flashes condition guide](https://eyehealthguide.org/conditions/floaters-and-flashes/)[Flashes and floaters symptom page](https://eyehealthguide.org/symptoms/flashes-and-floaters/) ## What floaters are — when they are usually harmless Floaters are spots, threads or cobwebs that drift, most obvious against a bright sky or a white wall. They are shadows on the retina from clumps in the vitreous gel. They become more common with age and in short-sighted eyes. Long-standing floaters that stay stable are a normal part of ageing for most eyes. The usual cause is posterior vitreous detachment (PVD). The brain often learns to ignore stable specks. That reassurance applies to unchanged floaters, not to a new shower. ## When floaters become dangerous The danger is the sudden change, not the existence of a speck. As the gel pulls away it can tear the retina. A tear can progress to detachment. Timing — hours to days — decides urgency, not how annoying an old thread looks. - Sudden cobweb or ring plus flashes: often new PVD — still needs a dilated exam the same day - Shower of black dots, curtain, or sudden blur: tear, detachment or vitreous haemorrhage until examined - One or two old threads unchanged for months: mention at the next routine test [Posterior vitreous detachment](https://eyehealthguide.org/conditions/posterior-vitreous-detachment/)[Retinal tear](https://eyehealthguide.org/conditions/retinal-tear/)[Retinal detachment](https://eyehealthguide.org/conditions/retinal-detachment/) ## What happens if you need a check The examiner dilates the pupil and looks at the far retina. Most people are reassured the same visit. If a tear is found, laser or freezing can often seal it before detachment spreads. Do not drive until the drops wear off, and do not accept an undilated ‘quick look’ as enough for new flashes. ## Read next ## Frequently asked questions ### Do floaters ever go away? Long-standing floaters often become less noticeable as the brain ignores them, and some settle lower in the eye. They rarely vanish completely. Stable floaters are usually nothing to worry about. ### Are floaters normal at my age? They become more common from middle age and in short-sighted people. A gradual increase over years is typical; a sudden increase over hours or days is not. ### Can I ignore one or two floaters? One or two stable floaters that have been there for months are usually harmless. Seek same-day care if they suddenly multiply or come with flashes or a shadow. ### What will the optometrist do? They examine the back of the eye, usually with dilating drops, to check for tears or detachment. Most people are reassured the same visit. ### Does diabetes change the advice? Yes. Sudden dark floaters can be vitreous blood. If you have diabetes, treat a new shower as an emergency even if you already attend retinopathy screening. Your next step ## Take this to your appointment Write down what has changed, when it started, your current medicines and the questions you want answered. Take these to your eye-care appointment. Sudden loss of sight, severe eye pain or a dark curtain across vision needs immediate assessment. Do not wait to complete a worksheet. ## Sources for this information These references support the information on this page. Follow the linked source for its full context. - [NHS — Floaters and flashes in the eyes](https://www.nhs.uk/symptoms/floaters-and-flashes-in-the-eyes/) - [National Eye Institute - Floaters](https://www.nei.nih.gov/eye-health-information/eye-conditions-and-diseases/floaters)