Understanding Eye Floaters and Flashes

Eye floaters are small shapes like spots, threads, or cobwebs that drift across your vision, especially against bright backgrounds. They move with your eyes and are often hard to focus on. Floaters form when collagen fibers clump together in the vitreous—the gel-like substance inside the eye—and cast shadows on the retina. This process becomes more common with age, particularly in people aged 50 to 75, those who are nearsighted, or individuals who have had cataract surgery.

Flashes of light can also occur when the shrinking vitreous pulls on the retina. These quick bursts of light are usually harmless but should not be ignored if they appear suddenly or frequently, as they can signal more serious conditions.

In some cases, floaters or flashes may indicate retinal tears, detachment, uveitis (inflammation), or bleeding inside the eye. Any sudden vision changes should be evaluated promptly by an eye care professional.

Diagnosis typically involves a dilated eye exam, which allows doctors to examine the retina and vitreous more thoroughly. Most floaters don’t require treatment, but in severe cases, options include a vitrectomy—surgical removal of the vitreous—or laser therapy to break down the floaters. However, laser treatment is still considered experimental.

To maintain eye health, regular eye exams and awareness of changing vision are essential. Early detection of potential issues can help protect your sight and prevent long-term complications.