Eye floaters are a common visual phenomenon that many people experience, though they are often misunderstood. They appear as small spots, squiggly lines, or cobweb-like shapes that drift across the field of vision. You may notice them more clearly when looking at bright backgrounds, like a blue sky or a blank screen. These shapes move when your eyes do, and if you try to focus directly on them, they tend to dart away, making them difficult to track.

Floaters form when tiny protein fibers called collagen clump together in the vitreous, the gel-like substance inside the eye. As we age, the vitreous becomes thinner and shrinks, causing the collagen fibers to stick together.

These clumps cast tiny shadows on the retina, the light-sensitive tissue at the back of the eye. The shadows are what we perceive as floaters, and their movement across our vision is simply the result of the way they interact with the retina.

In addition to floaters, flashes of light can also occur. These flashes appear as brief bursts or streaks of light, which happen when the vitreous gel pulls on the retina. This tugging stimulates the light receptors in the retina, creating the illusion of flashes. While floaters and flashes are usually harmless and a normal part of aging, a sudden increase in either symptom can indicate a more serious issue, such as retinal strain or detachment.

People between the ages of fifty and seventy-five are most likely to experience floaters and flashes, and they are also more common in those who are nearsighted or have had cataract surgery. While these occurrences are generally benign, new or worsening symptoms could suggest an underlying problem, such as a retinal tear, which needs immediate attention.