Eye Floaters and Flashes

It often starts quietly. You’re driving along Highway 1, working at your computer, or enjoying the coastal light, and something drifts across your vision. A speck. A thread. Maybe even a brief flash of light at the edge of your eye.

What are Eye Floaters?

Floaters are small shapes that appear to drift across your field of vision. They move when your eyes move and often slip away when you try to look directly at them.

Our patients in our Monterey and Salinas offices commonly describe floaters as:

  • Tiny dots or specks
  • Thread-like strands or squiggles
  • Cobwebs or shadowy shapes

Floaters originate within the eye, specifically within the vitreous, a clear gel that fills the center of the eye. As part of the natural aging process, the vitreous slowly becomes more liquid and less uniform in consistency. Small fibers can clump together and cast shadows on the retina, which you perceive as floaters.

Occasional floaters are extremely common (especially after age 50) and usually don’t indicate a serious problem. 

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Illustration of retinal flashes showing bright lightning-like streaks of light across vision, representing flashes in the retina

What Are Flashes of Light?

Flashes look different. Instead of drifting shapes, they appear as sudden bursts of light—often described as lightning streaks, sparkles, or camera flashes.

Flashes occur when the vitreous gel pulls on the retina, mechanically stimulating it. Your brain interprets that stimulation as light, even when no light source is present. You may notice flashes:

  • In your side (peripheral) vision
  • In dark rooms or at night
  • When you close your eyes

Like floaters, flashes are common with aging, but persistent or sudden flashes should never be ignored.

Schedule A Comprehensive Eye Exam

At Vantage Eye Center, our eye doctors regularly evaluate patients across the Monterey Peninsula and Salinas Valley for floaters, flashes, and sudden changes in vision.

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When to See an Eye Doctor Right Away

Specific patterns of floaters and flashes warrant prompt evaluation by an eye care professional:

  • Sudden increase in floaters
  • Flashes that occur repeatedly or persist for more than a few days may indicate ongoing traction on the retina.
  • Floaters and flashes together
  • A new shadow or curtain over your vision, moving across your visual field, is a classic sign of retinal detachment and requires immediate care.
  • Sudden vision changes, including blurry vision, loss of peripheral vision, or any rapid change in vision accompanied by floaters or flashes, require urgent evaluation.

Even if you’re not sure whether your symptoms are severe, it’s better to err on the side of caution. An eye doctor can perform a dilated exam to check the retina and assess for tears or detachments.

How Vantage Eye Doctors Diagnose the Cause

A comprehensive eye exam typically includes dilating your pupils so the doctor can clearly see the vitreous and retina at the back of the eye. Special lenses and imaging tools help detect any tears, detachment, hemorrhage, or other abnormalities. Prompt diagnosis is essential when symptoms are new or severe, as early treatment can preserve vision.

Treatment Options for Floaters and Flashes

For many people with benign floaters or flashes related to normal vitreous aging, no treatment is necessary. The brain often filters out these visual disturbances over time.

If a retinal tear is found, laser therapy or freezing (cryopexy) may be used to seal the retina and prevent detachment. Retinal detachments require surgical intervention, such as vitrectomy or scleral buckle techniques. In rare cases where floaters severely interfere with vision, surgical options like vitrectomy may be considered after careful evaluation.

Commonly Asked Questions & Answers on Eye Floaters and Flashes

Yes, occasional eye floaters are very common, especially as we get older. They usually come from natural changes in the vitreous, the clear gel inside the eye. If you have had the same small floater for years and it has not changed, it is usually not an emergency. However, any sudden increase in floaters, or floaters with flashes or shadows, should be checked right away.

Floaters look like dots, cobwebs, or squiggly lines that drift across your vision. Flashes look more like brief streaks of light, sparkles, or “lightning” at the edge of your vision. Floaters come from tiny clumps inside the vitreous casting shadows on the retina. Flashes happen when the vitreous tugs on the retina and mechanically “triggers” it, even in the dark.

Call an eye doctor immediately or go to an emergency eye clinic if you notice:

  • A sudden shower of new floaters

  • Flashes that start suddenly or keep happening

  • A dark curtain, veil, or shadow moving over part of your vision

  • Any sudden loss of side (peripheral) vision

These can be warning signs of a retinal tear or retinal detachment, which needs prompt treatment to protect your vision.

Most mild floaters and brief flashes from normal vitreous aging do not cause blindness and do not need treatment. The concern is when they are caused by a retinal tear or retinal detachment. If the retina pulls away and is not treated quickly, permanent vision loss can occur. That is why new or worsening symptoms should always be evaluated.

Many people notice floaters less over time. Your brain often learns to “tune them out,” so they become less distracting, even if they are still there. True floaters rarely disappear completely, but if they are stable and your retina is healthy, your eye doctor may simply monitor them at regular exams.

For most patients, treatment is not needed. If floaters are very dense and truly interfere with daily activities, a retinal specialist may discuss options such as vitrectomy (a surgery to remove the vitreous gel) or other procedures in selected cases. Because these surgeries carry risks, they are usually reserved for severe, persistent symptoms after careful evaluation.

If your eye doctor has already examined you and found no retinal tear or detachment, they will recommend a follow-up schedule based on your eye health and risk factors. In general, adults should have regular comprehensive eye exams, and anyone with new or changing floaters, flashes, or shadows in their vision should schedule a visit right away, even if their last exam was recent.