This can be a difficult question to answer. Most of the time, floaters occur due to age-related changes in the eyes. The vitreous gel that fills the center of the eyes decreases and may become dry, resulting in small pieces breaking loose and floating through the middle of the eye. Sometimes, the clumps of protein settle toward the bottom of the eye where they are not noticed. Sometimes, the brain gets used to the floaters so doesn't register them as often as it once did. Sometimes, if you move your head, floaters move out of the field of vision. These small effects can make it seem as though floaters have gone away. It isn't necessary to get rid of floaters if they aren't creating a visual obstruction. Only when they are do you need to talk to an ophthalmologist.