I have a set of Bushnell Trophy binos. When I got them out this Muzzleload season and looked throught them my eyse seemed liked they crossed and my vision blurred. Try as I might, I couldnt get them to focus. I tried refocussing them with the eye piece and then the center wheel. Still was freaking my eyes out. Everytime i took them away from my eyes, it was like I had blurred vision for a few seconds and instant headache. I let my buddys try them to see if it was just me and they also had the same results. They were awesome the past several seasons and I had been carrying them over my Steiners since they were more powerfull. They havent been dropped or abused in any way. They still look brand new when you clean the dust off them. Something apparently has gone haywire internally between last season and this one. I have boxed them up and they are on the way to Bushnell to check them out. Hopefully they will fix or replace them. Im just glad I had another pair to fall back on this season.