Flashes, Floaters, and the Curtain: What Your Symptoms Are Telling You

New floaters. A flash of light in your peripheral vision. A shadow or curtain creeping across your visual field. These are symptoms that patients frequently dismiss, wait out, or attribute to stress and fatigue. In most cases, they represent a posterior vitreous detachment — a common, age-related event that resolves without treatment. In some cases, they represent something that requires urgent evaluation. The problem is that you cannot tell the difference from the inside, and neither can we without examining you.

This is one area of eye care where the right response is always to call us first.

Your Annual Exam Is About More Than Your Prescription

Glasses and contacts are important — but they are only part of what we do at your annual wellness exam. Getting your prescription right improves your quality of life every day. Evaluating the vitreous, retina, and peripheral fundus protects your long-term vision in ways no prescription change ever could.

We tell every patient the same thing at every visit: "If you ever see new flashes, floaters, or a curtain in your vision, let us know immediately and we will get you in. I would much rather see you and tell you everything looks fine than not see you and wish I had. You are not bothering us — that is exactly what we are here for. Peace of mind, or to get you where you need to go."

That is not a formality. It is the standard of care for this category of symptoms.

What Is a Posterior Vitreous Detachment?

The vitreous is the gel-like substance that fills the interior of the eye. In youth it is firmly attached to the retina. With age — and accelerated by high myopia, prior cataract surgery, eye trauma, or simply genetics — the vitreous gradually liquefies and contracts, eventually pulling away from the retinal surface. This separation is called a posterior vitreous detachment (PVD).¹

The process is extremely common. Most adults over 60 have experienced at least one PVD, often without realizing it.² The event itself is not dangerous. The risk lies in what can happen during the separation.

Why It Requires Urgent Evaluation

As the vitreous pulls away from the retina, it can tug on areas where adhesion is particularly strong — most commonly at the peripheral retina. This traction is what causes the flashing lights patients describe: a mechanical stimulus to the retina that the brain interprets as light. If the traction is strong enough, it can create a retinal tear. If fluid passes through that tear beneath the retina, a retinal detachment follows. Retinal detachment is a vision-threatening emergency.³

The sequence from PVD to tear to detachment is not inevitable — the majority of PVDs resolve without creating a tear. But the minority that do cause tears can do so quickly, and the symptoms that distinguish a benign PVD from a complicated one are not reliably different from the patient's perspective. This is why new-onset flashes and floaters require prompt examination — not a wait-and-see approach.

How We Evaluate

When a patient presents with new flashes or floaters, we perform a dilated fundus examination (DFE) for direct visualization of the vitreous, retina, and peripheral fundus, combined with Optomap widefield imaging to document the retinal periphery with precision and create a reliable baseline for comparison. Together these give us a thorough picture of the vitreous-retinal interface and allow us to identify tears, hemorrhage, or areas of concern that require further action.

We do not have B-scan ultrasound in office. In cases where the view to the retina is obscured — for example, by significant vitreous hemorrhage — referral to a retinal specialist for further evaluation is the appropriate step.

Any finding involving retinal pathology — a new or acute tear, hemorrhage, detachment, or high-risk peripheral lesion — goes directly to our retinal specialist partners. Their expertise and equipment are what those cases require, and timely referral is part of how we take care of you.

What to Do With Your Floaters

For most patients with a confirmed uncomplicated PVD, floaters are a quality-of-life issue rather than a medical one. They are genuinely bothersome — particularly large, dense opacities that drift into the central visual field — and the honest answer is that they improve for most patients over time as the brain adapts and the floater settles inferiorly, but they do not disappear.⁴

Surgical options exist. Vitrectomy removes the vitreous — and with it the floater — but carries real risks including accelerated cataract progression and retinal complications that in most cases do not justify the benefit for floaters alone. YAG vitreolysis uses laser to fragment larger, discrete floaters and is a more targeted option, though it is not appropriate for all floater types and has its own limitations.

Nutritional supplements marketed for vitreous health — such as VitreousHealth — are available and noninvasive. The evidence base supporting these products is limited at this time, and we are transparent about that. For patients whose floaters are significantly affecting daily life and who are not candidates for or interested in procedural options, it is a low-risk consideration worth discussing.

Common Misconceptions

The most consequential one is also the most common: assuming new floaters are simply a normal part of aging and waiting weeks before mentioning them. They may well be benign — but that determination requires an examination, not patience. A retinal tear that is caught early can typically be treated in-office by a retinal specialist with laser or cryotherapy. One that progresses to detachment requires surgery.⁵

The other is the curtain. A shadow, veil, or curtain across any portion of your visual field is not a floater. It is a different symptom entirely and should be treated as an emergency. Do not drive yourself. Call us or go directly to an emergency eye care provider.

The Bottom Line

Most PVDs are benign. But the ones that are not move quickly, and the symptoms do not announce themselves differently. If you experience new flashes, floaters, or any change in your peripheral visual field — call us. That is what we are here for.

For educational purposes only. Not a substitute for individualized medical care.

Flashes, Floaters & PVD

1. Sebag J. Vitreous anatomy and pathology. In: Duane's Ophthalmology. Lippincott Williams & Wilkins; 2006.

2. Byer NE. Natural history of posterior vitreous detachment with early management as the premier line of defense against retinal detachment.

Ophthalmology. 1994;101(9):1503–1514. https://doi.org/10.1016/S0161-6420(94)31141-9

3. Hollands H, et al. Do findings on routine examination identify patients at risk for primary open-angle glaucoma? JAMA.

2009;301(20):2099–2104. https://doi.org/10.1001/jama.2009.709

4. Wagle AM, et al. Utility values associated with vitreous floaters. Am J Ophthalmol. 2011;152(1):60–65. https://doi.org/10.1016/j.ajo.2011.01.026

5. Mitry D, et al. The epidemiology of rhegmatogenous retinal detachment. Eye. 2010;24(9):1535–1543. https://doi.org/10.1038/eye.2010.129