Eye Floaters and Flashes: When Should You Be Concerned?
- David B. Sabin
- May 7
- 4 min read
Seeing small specks, cobwebs, strings, or shadows drifting through your vision can be unsettling. These are called eye floaters, and they are often caused by normal changes inside the eye. Some people also notice flashes of light, which can look like lightning streaks, camera flashes, or flickers in the side vision.
While floaters and flashes are sometimes harmless, they should never be ignored when they appear suddenly. In some cases, they can be warning signs of a retinal tear or retinal detachment, which requires urgent eye care. The National Eye Institute lists sudden new floaters, flashes, and a curtain or shadow in vision as possible symptoms of retinal detachment.
At OPT-ISM in Tampa, we take new floaters and flashes seriously because early evaluation can help protect your vision.
What Causes Eye Floaters?
Floaters usually come from changes in the vitreous, the clear gel-like substance that fills the inside of the eye. Over time, the vitreous naturally becomes more liquid and can form small clumps or strands. These tiny changes cast shadows on the retina, which you see as floaters.
Floaters may look like:
Small dots or specks
Cobwebs
Threads or strings
Transparent circles
Dark spots that move when your eye moves
Many floaters are related to aging and are not dangerous by themselves. However, a sudden increase in floaters is different and should be checked promptly. Mayo Clinic recommends contacting an eye specialist immediately if there is a sudden increase in floaters, especially when flashes or vision loss are also present.
What Causes Flashes of Light?
Flashes often happen when the vitreous pulls or tugs on the retina. The retina is the light-sensitive tissue in the back of the eye. When it is stimulated by traction, your brain may interpret that signal as a flash of light.
Flashes may appear as:
Lightning streaks
Flickering lights
Sparkles
Camera-like flashes
Brief flashes in the side vision
One common cause is a posterior vitreous detachment, also called a PVD. This happens when the vitreous separates from the retina. PVD is common with age and often does not require treatment, but it must be evaluated because the pulling can sometimes create a retinal tear. The National Eye Institute notes that vitreous detachment can cause floaters and flashes, and diagnosis is made with a dilated eye exam.
Why Retinal Tears Matter
A retinal tear can happen when the vitreous pulls hard enough to create a break in the retina. If fluid passes through that tear, the retina can begin to lift away from the back of the eye. This is called a retinal detachment.
A retinal detachment is a medical eye emergency. Without prompt treatment, it can cause permanent vision loss. Symptoms can include new floaters, flashes, reduced vision, or loss of side vision. Mayo Clinic notes that contacting an eye doctor right away can help save vision when retinal detachment symptoms occur.
The important point is this: you cannot tell on your own whether new floaters or flashes are harmless or serious. A dilated retinal exam is needed to check for holes, tears, bleeding, or detachment.
Urgent Symptoms: When to Seek Same-Day Eye Care
You should seek same-day eye care if you notice:
A sudden shower of new floaters
New flashes of light
Floaters and flashes together
A dark curtain, veil, or shadow in your vision
Loss of side vision
Blurry or distorted vision that appears suddenly
New floaters after eye trauma
New floaters if you are highly nearsighted
New symptoms after eye surgery
A curtain or shadow over the vision is especially concerning and may indicate retinal detachment. The National Eye Institute describes this as a dark shadow or “curtain” in the side or central vision.
If you are experiencing these symptoms, do not wait days or weeks to see if they improve. Call an eye doctor right away.
What Happens During the Eye Exam?
When you come in for floaters or flashes, your eye doctor will usually perform a dilated eye exam. Dilation allows the doctor to carefully examine the retina, including the far peripheral retina where tears can occur.
Depending on your symptoms, your exam may include:
Vision testing
Eye pressure measurement
Dilated retinal evaluation
Retinal imaging
Peripheral retinal examination
Referral to a retina specialist if a tear, hole, or detachment is found
Retinal imaging can be helpful, but it does not always replace a full dilated exam when symptoms are urgent. The goal is to make sure there is no retinal tear, retinal bleeding, or retinal detachment.
Are Floaters Ever Treated?
Most floaters do not need treatment once the retina has been confirmed to be healthy. Over time, many people notice them less because the floaters may settle or the brain adapts to them.
Treatment is usually focused on the underlying cause. For example, floaters caused by bleeding, inflammation, diabetes, or retinal disease require evaluation and management of the source. Mayo Clinic notes that most floaters do not require treatment, but medical causes such as bleeding from diabetes or inflammation should be treated.
Same-Day Eye Care in Tampa for Floaters and Flashes
New floaters and flashes can be scary, but getting checked quickly is the safest approach. Many cases are caused by normal vitreous changes, but some are early warning signs of a retinal tear or detachment.
At OPT-ISM, we offer medical eye evaluations for urgent symptoms like floaters, flashes, eye pain, red eyes, vision changes, and concerns about retinal health.
If you notice a sudden change in your vision, especially new floaters, flashes, or a curtain-like shadow, contact OPT-ISM in Tampa for same-day eye care.
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