Floaters & Flashes

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Signs & Symptoms

•  Floaters are specks, dots, cobwebs, or wavy lines that seem to fall within the line of sight. They rarely affect eyesight. They are more visible against a plain or dark background.

•  Flashes are streaks of light that “flash” across the field of vision. They can occur when the eyes are closed or in extreme darkness.


With aging, the middle portion of the eye, called the vitreous, becomes less solid and more liquid. This allows particles (floaters), which have always been in the eye, to begin to move around. Flashes can occur when the vitreous shrinks and pulls on the retina of the eye. This is common. On rare occasions, when the vitreous detaches from the retina, it can rip or tear the retina. This may lead to a detached retina. The retina peels away from the eye wall causing sight loss.

Risk Factors for Floaters and Flashes

•  Eye diseases or injuries.

•  A tear in the retina. Aging and cataract surgery increase the risk for this.

•  High blood pressure.

•  Migraine headaches.

•  Nearsightedness.


Self-care is enough to treat floaters and flashes unless they are due to another medical condition.

Questions to Ask

Self-Care / Prevention

•  Move your eyes up and down (not side to side) several times.

•  Don’t focus on or stare at plain, light backgrounds, such as a blank pastel wall or the light blue sky.

•  You may notice flashes less if you avoid moving suddenly, don’t bend over, and don’t get up quickly from sitting or lying down.

This website is not meant to substitute for expert medical advice or treatment. Follow your doctor’s or health care provider’s advice if it differs from what is given in this guide.


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