Small specks or clouds moving in your field of vision as you look at a blank wall or a clear blue sky are known as floaters. Most people have some floaters normally but do not notice them until they become numerous or more prominent.

In most cases, floaters are part of the natural aging process. Floaters look like cobwebs, squiggly lines or floating bugs. They appear to be in front of the eye, but are actually floating inside. As we get older, the vitreous—clear gel-like substance that fills the inside of the eye—tends to shrink slightly and detach from the retina, forming clumps within the eye. What you see are the shadows these clumps cast on the retina, the light-sensitive nerve layer that lines the back of the eye.

The appearance of flashing lights comes from the traction of the vitreous gel on the retina at the time the vitreous pulls away. Flashes look like twinkles or lightning streaks. You may have experienced the same sensation if you have ever been hit in the eye and “seen stars.”

Floaters can get in the way of clear vision, often when reading. Try looking up and then down to move the floaters out of the way. While some floaters may remain, many of them will fade over time.

Floaters and flashes are sometimes associated with retinal tears. When the vitreous shrinks, it can pull on the retina and cause a tear. A torn retina is a serious problem. It can lead to a detached retina and blindness. If new floaters appear suddenly or you see sudden flashes of light, it is important to make an appointment for a dilated exam as soon as possible.

Back to Top