Only got one eye that works. Never experienced that with 384 (Bering r25) or 640 scanner going to 640 scope or my old 384 scope with 384 scanner. On the gun I almost always use wh hot except REALLY dense fog ( (bl hot). I do like green or iron hot on my rix st6 scanner. Brightness is set low. As said, try diff color reticles (red is by far best for me) and maybe see the eye docI never got the blindness/ blurry vision with the other scope last year. I’m going to try it on the left eye the next time I can go out. Unfortunately, I’m driving back to my state and our season doesn’t open for a few more months. I cleaned house in Nevada this past week though.