I had the same problem with my Strikefire, so I sent it back and received another brand new one from Vortex, but it was the same. Turns out the problem was with my eyes, not the Strikefire and I have 20/20 vision and do not where glasses or contacts. When looking through it, focus on the target, not the dot. If you focus on the dot, it will be blurry, if you focus on the target, or shoot with both eyes open, the dot will be round. Google red dot not round problems, it is a very common problem, and 98% of the time, it is the shooters eyes that are the problem. There are others on this board who helped me when I had the same problem as you, and they know alot more than I do and can help steer you in the right direction. By the way, Vortex customer service is probably the best in the buisness, they will take care of issue you have.