As we age, our vitreous starts to thicken or shrink. Sometimes clumps or strands form in the vitreous. If the vitreous pulls away from the back of the eye, it is called posterior vitreous detachment.
Floaters usually happen with posterior vitreous detachment.
They are not serious, and they tend to fade or go away over time. Severe floaters can be removed by surgery, but this is seldom necessary.
Flashes can look like flashing lights or lightning streaks in your field of vision. Some people compare them to seeing “stars” after being hit on the head. You might see flashes on and off for weeks, or even months.
Flashes happen when the vitreous rubs or pulls on your retina.
As people age, it is common to see flashes occasionally.