I have a VERY slight astigmatism. I find that with higher end red dots it is usually barely noticeable unless the brightness is so high the dot blooms (like if it where on max brightness in a dark room) so typically Aimpoints and the like work fine. They way it was explained to me from someone in the optics industry is that the quality of the emitter (the actual laser beam) and the QC that goes into poking that very little exit hole (basically they take a full size laser and put a cover over it with a pin hole to control dot size and that helps battery life and the output potential of the laser ) has a great effect on the dots shape. So often times cheaper dots are not round to begin with.
I have found on the budget end the Vortex micro and Holosun offerings seem to be the best
The worst for me was the green MRO
Then aimpoints and eotechs are basically perfect … go figure
I have found on the budget end the Vortex micro and Holosun offerings seem to be the best
The worst for me was the green MRO
Then aimpoints and eotechs are basically perfect … go figure