You see tiny moving dots, known as floaters, because of small clumps or strands in the eye's jelly-like vitreous, which cast shadows on your retina, appearing as specks or threads that drift with eye movement, often more noticeable against bright backgrounds like a blue sky or white wall. While usually harmless age-related changes, a sudden increase in floaters or flashes of light can signal a serious issue like retinal tear, requiring immediate medical attention.
Floaters are small specks or clouds moving in your field of vision. You may see them more clearly when looking at a plain background, such as a blank wall. Floaters are actually tiny clumps of gel or cells inside the vitreous, the clear jelly-like fluid that fills the inside of your eye.
Most eye floaters are caused by age-related changes that occur as the jelly-like substance (vitreous) inside your eyes liquifies and contracts. Scattered clumps of collagen fibers form within the vitreous and can cast tiny shadows on your retina. The shadows you see are called floaters.
You may notice that the floaters you see move with your vision and they can make it hard to read. While some floaters may be harmless and temporary, for people with diabetes, they can be a sign of a serious problem in your eye. If you're seeing floaters, get your eyes checked right away.
One lesser-known symptom of high blood pressure is the occurrence of flashing lights in the eyes, also called “floaters.” These small specks or spots appear to float across your field of vision and can be a sign that the condition is affecting the blood vessels in your eyes.
The vitreous humour in your eyes is made of 98% of water. If you're constantly dehydrated, this gel-like substance can lose shape or shrink. This can lead to the occurrence of floaters because the proteins in this substance do not remain dissolved and thus, they solidify.
Electronic screens such as smart phones, tablet personal computers (PCs), and liquid-crystal displays (LCDs) emit blue light that accelerates vitreous degeneration, resulting in vitreous opacity and increased floaters, with floating shadows in front of the eyes as the main complaint.
Acute glaucoma symptoms include ocular discomfort, impaired vision, and epiphora. Headache, nausea, and abdominal discomfort are all associated systemic symptoms.
Are there different types of floaters?
Floaters look like small specks, dots, circles, lines or cobwebs in your field of vision. While they seem to be in front of your eye, they are floating inside. Floaters are tiny clumps of gel or cells inside the vitreous that fills your eye. What you see are the shadows these clumps cast on your retina.
Early signs of an eye stroke (retinal artery occlusion or ischemic optic neuropathy) typically involve sudden, painless vision loss or changes, most often in only one eye, including blurred vision, blind spots, floaters, or a dark shadow covering part of your sight. It often happens upon waking and is a medical emergency requiring immediate attention to potentially save sight and identify a risk for a full stroke.
"It's very normal to have an occasional translucent floater or one or two small dark floaters that you see every now and then — almost everyone sees those," Dr. Davis says. "Those types of floaters are very common and there are usually not any issues with those."
Symptoms
Floaters are typically harmless, but they can easily be confused with other vision changes like large spots in your vision. These symptoms can be signs of other medical conditions, like: High blood pressure. Stroke.
As people age, the vitreous humor inside the eye can shrink and pull away from the retina, leading to PVD. This condition can cause flashes of light or sparkles, particularly in the peripheral vision. While PVD is usually not serious, it can sometimes lead to retinal detachment, which is a medical emergency.
Stage 1: Glaucoma begins with any alteration to your drainage system, which leads to increased intraocular pressure.
Halos around lights: Rainbow-like rings around lights, especially at night, can be a red flag. Eye pain or pressure: A dull ache or intense pressure may signal acute glaucoma.
Visual symptoms can include blurred vision, tunnel vision, or loss of one side of the visual field, depending on the location of the damage. Other symptoms can include eye pain (especially with movement), loss of color vision, flashing lights, and sometimes headache or nausea.
Other signs and symptoms may include:
Eye floaters are more likely to come from aging, inflammation, eye injuries or eye surgeries and medications. Brain tumors can cause changes in vision, especially if they affect the occipital lobe.
The 5 key warning signs of a stroke, often remembered with the FAST acronym, are sudden Face drooping, Arm weakness, Speech difficulty, and the crucial Time to call 911; other signs include sudden trouble seeing, walking, dizziness, or a severe headache, requiring immediate emergency care.
Floaters are actually caused by bits of collagen floating around in the vitreous, which is a gel-like substance located at the back of the eye. As we age, the collagen fibers in the vitreous sometimes begin shrinking down into small fibrous shreds that then clump together and cause eye floaters.
The 10-10-10 rule for eyes is a simple strategy to combat digital eye strain: every 10 minutes, take a 10-second break and look at something at least 10 feet away, giving your eyes a rest from near-focus on screens. This practice helps prevent eye fatigue, dryness, and headaches by allowing eye muscles to relax and encouraging blinking, which is often reduced during screen use, says Healthline and Brinton Vision.
During an eye exam, your optometrist can check your vision to find out what's causing your sudden increase in floaters. One potential underlying cause is high blood pressure, which damages delicate blood vessels and makes floaters more noticeable.