is this a daily occurence? how long does the flash last? is it in certain lighting only? are there new floaters? when is your next appointment?
There are a couple of possibilities
One is that the implant is reflecting lights off of its edge in certain lighting conditions, this is normal most of the time
Other is that the gel in the back of the eye is undergoing changes, this puts you at risk for retinal tears
You need to mention this to him at the next visit and have the eye dilated and checked to make sure all it well, most likely, it is not a worrisome thing and you can have the other eye done as well, regards XXXXX
What I was referring to as a possibility is a tear in the retina, that is the thin layer of tissue in the back of the eye that can be damaged and if left untreated or unnoticed can lead to blindness in the eye. This is why it is important to get a dilated exam, if one is discovered an in office laser can help fix it. Regards