A sudden increase in floaters can range from harmless ageing changes to serious retinal problems.
Common benign cause
The most frequent reason is posterior vitreous detachment, where the eye’s gel separates from the retina. This usually happens in mid or later life.
- Floaters may look like cobwebs, rings, or little insects
- Often accompanied by brief flashing lights at the side
- Vision may otherwise remain clear
- Risk is higher in short-sighted people and after surgery
Serious causes needing urgent review
Sometimes new floaters indicate bleeding or retinal tears. Early detection prevents progression to detachment.
- Sudden “shower” of black spots or streaks
- Floaters with a curtain, shadow, or loss of side vision
- Floaters following trauma to the eye or head
- Emergency assessment is recommended the same day
