Eye floaters are specks or strands drifting across vision, caused by changes in the vitreous gel in the eye. An eye doctor advises monitoring them and seeking care promptly if they appear suddenly, worsen, or accompany flashes or vision loss.

Eye floaters are a common visual experience that many people notice at some point in their lives, yet they are often misunderstood. They appear as tiny spots, squiggly lines, rings, or cobweb-like strands drifting across the field of vision. You might notice them most clearly when looking at a bright background such as a blue sky, a blank computer screen, or a white wall. These small shapes seem to move whenever your eyes move, and when you try to focus directly on them, they appear to dart away. Although they can feel distracting or even alarming at first, floaters are usually harmless and are considered a normal part of how the eye changes over time.

Floaters form when bits of collagen, which are tiny protein fibers, clump together in the vitreous, the clear gel-like substance that fills most of the eye’s interior. As we age, the vitreous gradually becomes thinner and begins to shrink, a process sometimes called vitreous degeneration. This natural change causes the fibers within it to stick together, forming clumps that cast small shadows on the retina, the light-sensitive tissue at the back of the eye. What you actually see are these shadows moving across your vision. Because the vitreous shifts slightly when your eyes move, the floaters appear to drift, creating that characteristic floating effect.

Flashes of light are another related phenomenon that often occur alongside floaters. They may appear as brief streaks, flickers, or spark-like bursts in your vision, especially in dim lighting. These flashes happen when the vitreous gel pulls or tugs on the retina, stimulating its light-sensitive cells and creating the illusion of light. While occasional flashes can be a normal part of aging, they should be taken seriously if they happen frequently or suddenly increase. This combination of floaters and flashes can sometimes signal that the retina is under stress, or in more serious cases, that a tear or detachment is beginning to develop.

Floaters and flashes are most commonly reported in adults between the ages of fifty and seventy-five, although they can occur earlier, particularly in people who are nearsighted. Individuals who have undergone eye procedures such as cataract surgery may also notice them more often. In many cases, these symptoms are benign and do not interfere significantly with vision. However, a sudden change—such as a shower of new floaters, persistent flashes, or a shadow creeping into your field of view—can indicate a more serious underlying issue that requires prompt medical attention.