In most cases, spots or “floaters” are very common and are a part of the natural aging process. As we get older, the vitreous (the 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 lining the back of the eye.
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.
If you experience a sudden “flash” of light or rush of floaters, you may have a tear in your retina or your retina may be detaching from the back of the eye. This is a serious condidtion that must be treated by a medical professional as quickly as possible to avoid permaninet vision loss.