I have been using Sig's Romeo Zero red dot sight for a year and because of my astigmatism, the dot looks more like a starburst with a tail. I even looked through my friend's Holosun 407K (red dot) and it was not as clear. So I went with the green colored 507K and although there is slight blur, having both 32 and 2 MOA actually helps greatly me distinguishing exactly where the center point of the dot is. I have went out to the range to zero in the sight and found out that I can shoot .5 inch 3 shot groupings from 10 yards. I was not able to do that with my other red dot sight.
