I was referred to that link by our optometrist and FP when I had floaters. My FP and his wife both had floaters a couple of months before I did.
Scary stuff until you find out that they are harmless.
At first you need your eyes checked out to make sure your retina is okay like yours and mine.
Floaters as big as mine are not totally harmless, they obstruct my vision to some degree. The doctor said they would “settle”. They are not as prominent as they were but they are still in between me and whatever I am looking at. (Kinda hard to describe)