Flashes and Floaters
Flashes and Floaters
Flashes and floaters are common visual symptoms that many people notice as they age. While they are often harmless, in some cases they can be a warning sign of a more serious eye condition that requires urgent attention.
What Are Floaters?
Floaters appear as small dark specks, threads, or cobweb-like shapes that drift across your vision. They are caused by tiny clumps within the vitreous gel (the clear substance that fills the inside of the eye). These clumps cast shadows on the retina, which you see as floaters.
What Are Flashes?
Flashes look like brief flickers or streaks of light, often compared to lightning or sparks. They occur when the vitreous gel pulls or tugs on the retina. Flashes are more common in people who are short-sighted (myopic), have had eye surgery, or have sustained eye trauma.
When to Be Concerned
Occasional floaters and flashes are common and usually not dangerous. However, you should seek immediate assessment if you experience:
A sudden increase in floaters
New or frequent flashes of light
A dark curtain or shadow moving across your vision
These may be signs of a retinal tear or retinal detachment, conditions that require urgent treatment to prevent permanent vision loss.
Posterior Vitreous Detachment (PVD)
One of the most common causes of flashes and floaters is posterior vitreous detachment (PVD) — a natural age-related process where the vitreous separates from the retina. PVD is usually benign but can sometimes cause a retinal tear, which makes proper evaluation essential.
Diagnosis and Management
At Eye Doctor Clinics, our consultant ophthalmologists use advanced retinal imaging and a dilated slit-lamp examination to assess patients with flashes and floaters. Depending on the findings, treatment may involve:
Monitoring and reassurance (for benign PVD)
Laser therapy or surgery if a retinal tear or detachment is identified
Takeaway
Most floaters and flashes are harmless, but new or sudden symptoms should never be ignored. Prompt examination by an ophthalmologist can make the difference between reassurance and urgent sight-saving treatment.