Written & medically reviewed by Dr. Sanjay Anbu, MBBS· Last reviewed
Occasional floaters — small specks drifting across your vision — are usually harmless and increase with age. But a sudden shower of new floaters or flashes of light can signal a retinal detachment, a sight-threatening emergency.
A few floaters that drift, especially against bright backgrounds, are common
They increase gradually with age and are usually harmless
Flashes of light can occur as the gel inside the eye separates (often benign)
The concern is a SUDDEN change — new floaters, flashes or a shadow
When to see a doctor urgently
A sudden shower of new floaters, or flashes of light — urgent eye assessment
A dark curtain or shadow moving across your vision — emergency (possible retinal detachment)
Sudden loss of vision
Floaters after an eye injury
A sudden change is an emergency. Long-standing stable floaters are usually harmless, but a sudden increase, flashes, or a shadow across vision needs same-day eye care to prevent permanent sight loss. MedDroid gives general information, not a diagnosis.
Frequently asked questions
Are eye floaters dangerous?
A few stable floaters are usually harmless and common with age. A sudden increase in floaters, flashes of light, or a shadow across vision is an emergency needing same-day eye care.
What causes flashes of light in the eye?
Often the gel inside the eye pulling on the retina, which can be benign — but sudden flashes with new floaters can precede a retinal detachment and need urgent review.
When should I worry about floaters?
Seek urgent eye care for a sudden shower of new floaters, flashes, a curtain/shadow over vision, or sudden vision loss.
Reviewed by Dr. Sanjay Anbu, MBBS. MedDroid is an AI medical assistant and can make mistakes. It provides general health information, not a diagnosis or medical advice — always consult a qualified clinician. In an emergency, contact your local emergency number immediately.