Any ideas what this could be? He pointed at his right eye when I asked him. I looked in both and couldn't see anything. I also tried that rinsing thing where you pour water down the bridge of their nose so it rinse out the eye (he liked it and asked me to do it again. weirdo). Anyway, that didn't seem to stop it. He has gone to bed now but I'm worrying that I've missed checking something! He was doing it for over an hour before bedtime. They went to the zoo today so am wondering..
TIA