Hi, My Wife Has Recently Complained Of Eye-floaters, Which I

Hi, My wife has recently complained of eye-floaters, which I have had, and they come and go in my experience. But, she has just informed me that occasionally over the past two weeks, she also has experienced flashes of light on the outside vision area, especially when things are very dark (I think this just makes her more aware of this light). She is having NO pain associated with it, nor any dizziness or other sight issues. What is likely going on here? Thank You! Chuck