What they are
Floaters are moving spots, threads, or cobweb-like shapes in your vision. They often come from changes in the vitreous gel inside the eye. When the gel pulls on the retina, you may see flashes. Sometimes this process causes a retinal tear. A retinal detachment happens when the retina separates from its normal position and threatens sight. 1 · 2
Symptoms that need immediate attention
- A sudden shower or marked increase in floaters
- New flashes of light
- A curtain, shadow, or missing area in your side or central vision
- Sudden blurred or reduced vision
These symptoms may be painless. Contact an eye doctor immediately or go to an emergency department. Waiting to see whether they disappear can put vision at risk. 2
How it is diagnosed
A dilated retinal examination checks for a tear or detachment. Ultrasound or additional imaging may be needed when the view is limited. A symptom description alone cannot reliably distinguish harmless floaters from a retinal problem. 1 · 2
Usual treatment options
Stable floaters without a retinal problem often need no treatment. A retinal tear may need laser or freezing treatment. A detachment can require surgery by a retinal specialist. Even after an initial examination, return urgently if flashes or floaters increase or a shadow or vision change develops. 1 · 2
Questions to ask
- Was a retinal tear or detachment found?
- When should I return, and which new symptoms need an immediate repeat examination?
Sources & review status
About these guides: Prepared from the linked medical and prescribing references, checked October 13, 2026. Approved for publication by Dr. Nicholas Bottaro on October 13, 2026. These pages provide general education, not a diagnosis, treatment plan, or individual prescribing advice.