I've also had floaters and sometimes flashes (pin pricks) of light since childhood. Still have 20/20 vision, and every time I've gotten an eye exam they've said the retina looks healthy. From what I understand it'll be more of a "blizzard" of floaters when detachment is happening. At least for me the number of floaters seems to be highly correlated with my sleep quality. The flashes seem correlated with my blood pressure.