Don't know how old you are, but if you're 40+, you may also want to see an opthamologist to rule out issues with your retina. Earlier this year I had eye surgery because I had some blood vessels leak. I was with a pediatric patient, talking to the mom. I suddenly saw gnats flying in front of me. I grabbed at them a couple of times, then realized I needed to just ignore them because it would be weird to explain what I was doing by saying "We've got gnats here, I guess." After she left, I kept seeing them and they increased in number. I looked it up real quick and it said I needed to get in right away in case my retina was tearing away. So I did. They fixed it - no more gnats