Floaters and Flashes: What They Are and When They Matter
Floaters are those small specks, squiggly lines, or cobweb-like shadows that drift across your vision, especially when you look at a bright background. Flashes are quick bursts of light in your peripheral vision. Most of the time, they're harmless and just part of aging. But sometimes they signal something that needs immediate attention from your eye doctor. We see plenty of patients here at Vision Palace Optical on Avenue U worried about floaters and flashes — and it's smart to get them checked out rather than ignore them.
The key thing to know: occasional floaters are almost always normal. But a sudden increase in floaters, flashes, or a shower of floaters paired with vision loss is a red flag that requires same-day evaluation.
What Causes Floaters
Floaters happen when tiny pieces of the vitreous gel that fills your eye break loose and cast shadows on your retina. The vitreous is clear and gel-like, and as you age, it naturally breaks down and liquefies. This is completely normal and affects most people at some point.
Common, non-serious causes of floaters include:
- Age-related vitreous changes — As we get older, the vitreous gel shrinks and separates from the retina. This is called a posterior vitreous detachment (PVD), and it's harmless in most cases.
- Inflammation inside the eye — Eye inflammation, allergies, or past eye surgery can leave floaters behind.
- Bleeding in the eye — Uncontrolled diabetes or eye injury can cause bleeding, which shows up as dark floaters.
- Nearsightedness — People with myopia are more prone to floaters because of the shape of their eye.
If you've had the same floaters for months or years and your vision hasn't changed, there's usually nothing to worry about. But if you're noticing new floaters suddenly, especially if you're in Sheepshead Bay or working long hours at a computer on Avenue U, it's worth booking an exam to rule out anything serious.
What Causes Flashes
Flashes are different from floaters. They're typically caused by the vitreous gel tugging on your retina as it changes shape or separates. You might see flashes at the edge of your vision, like a camera flash going off inside your eye.
Common causes include:
- Posterior vitreous detachment — The same age-related process that causes floaters. The vitreous pulls away from the retina, and you see flashes for a few weeks or months as it happens.
- Migraine with aura — Some people see flashes of light as part of a migraine headache, even if they don't have a headache yet.
- Retinal tear or detachment — This is rare but serious. If the vitreous pulls hard enough, it can tear the retina or even detach it from the back of the eye. This is an emergency.
The difference matters: isolated flashes that come and go are often harmless. But flashes combined with a sudden flood of new floaters, a dark shadow in your peripheral vision, or loss of vision means you need to see an eye doctor right away.
When Floaters and Flashes Are an Emergency
According to the American Academy of Ophthalmology, a sudden onset of floaters and flashes — especially if accompanied by vision loss or a shadow in your peripheral vision — can signal a retinal tear or detachment. These conditions can lead to permanent vision loss if not treated quickly.
Call us immediately or go to an emergency room if you experience:
- Sudden shower of floaters — dozens appearing all at once
- New flashes — especially if you haven't seen them before
- Dark curtain or shadow — moving across your field of vision
- Loss of peripheral vision — a blank or dark area at the edge of what you can see
- Flashes combined with floaters — both happening at the same time
If this happens to you while you're in Brooklyn or near our Avenue U office, don't wait for an appointment. Retinal detachment is a medical emergency, and waiting even a few hours can make the difference between saving your vision and permanent damage.
Diagnosis and Evaluation
When you come in for an exam at Vision Palace Optical, Dr. Shlivko or Dr. Sheyko will dilate your pupils to get a clear view of your retina and vitreous. Dilation allows us to see whether there's a tear, detachment, bleeding, inflammation, or just normal age-related changes.
We'll also ask about:
- When the floaters or flashes started
- Whether they're getting worse or staying the same
- Whether you've had any eye trauma or surgery
- Your medical history (diabetes, high blood pressure, and blood clotting disorders all affect your eyes)
If we suspect a retinal issue that needs specialist care, we'll refer you to a retinal surgeon in Brooklyn. But in most cases, floaters and flashes are harmless, and we can put your mind at ease right there during your exam.
How to Live with Floaters
If your floaters are harmless — and your doctor confirms they are — here's the reality: you don't need to do anything. They usually fade or become less noticeable over time as your brain learns to ignore them.
A few tips that help patients in Brooklyn manage them:
- Don't focus on them — The more you look for them, the more you'll see them. It's like noticing a crack in your ceiling; once you see it, it's hard to unsee.
- Avoid bright, blank backgrounds — Floaters are most obvious against white walls, snow, or bright sky. Wearing sunglasses and spending time in shaded areas helps.
- Increase contrast — Dark backgrounds make floaters less visible to your brain.
- Stay hydrated and get sleep — There's no solid science here, but patients often report floaters seem worse when they're tired or dehydrated.
If floaters are severely affecting your quality of life, there's a surgical procedure called a vitrectomy that removes the vitreous gel. But this is rarely recommended because the surgery itself carries small risks, and floaters almost always become less bothersome over time.
Frequently Asked Questions
Are floaters a sign of vision loss?
Floaters themselves aren't vision loss — you can see through them. But floaters paired with a sudden change in vision, flashes, or a dark shadow does need urgent evaluation. That combination can mean a retinal tear or detachment, which does cause vision loss if untreated. If you've noticed new floaters and your vision feels different, book an eye exam right away.
Can you prevent floaters?
Not really. Floaters are a normal part of aging, especially if you're nearsighted. There's no diet, supplement, or eye exercise that prevents them. The best you can do is have regular eye exams to catch any serious retinal problems early. We recommend annual comprehensive eye exams for all adults in Brooklyn, particularly if you have risk factors like diabetes or high blood pressure.
Do floaters and flashes go away?
Floaters usually don't disappear completely, but they become less noticeable over months. Your brain adapts and stops noticing them the way it did at first. Flashes from a posterior vitreous detachment typically last a few weeks to a few months as the vitreous finishes separating from your retina. Once that process is done, the flashes stop.
Should I worry about floaters if I'm young?
Young people do get floaters, especially if they're nearsighted. It's less common than in older adults, but it happens. If you're in your 20s or 30s and noticing new floaters, they're usually harmless — but it's still worth getting them checked during a comprehensive eye exam to make sure your retina is healthy.
Can floaters be treated?
If floaters are harmless — which most are — treatment isn't necessary. If they're caused by inflammation or bleeding, treating the underlying condition (like diabetes control or managing an eye allergy) may help. In rare cases where floaters are severely affecting quality of life, vitrectomy surgery is an option, but it's not recommended lightly.
What's the difference between a floater and a flash?
Floaters are shadows cast by material floating in your vitreous gel — they stay in roughly the same spot and move when your eye moves. Flashes are bursts of light, usually at the edge of your vision, caused by the vitreous tugging on your retina. Floaters are usually harmless; flashes can be too, but flashes combined with new floaters need urgent evaluation.
Book Your Eye Exam in Brooklyn
If you're noticing floaters, flashes, or any other changes in your vision, don't wait. Book your eye exam at Vision Palace Optical through Zocdoc or call us at (718) 998-8400. We're at 1723 Avenue U in Sheepshead Bay, open Monday through Saturday. A comprehensive eye exam is the best way to make sure your floaters and flashes are nothing to worry about. We accept most insurance plans, including Medicaid, Medicare, EyeMed, MetroPlus, and more. Coverage varies by plan — call us or book through Zocdoc to verify your benefits before your visit.
References
- American Academy of Ophthalmology. "Floaters and Flashes: When to Be Concerned." AAO Patient Education.
- National Eye Institute — NIH. "Floaters and Flashes: Common Vision Problems." Vision Health Information.