I've just started wearing contacts and when shooting have noticed that my pins have taken on a "halo" effect. I can't shoot worth a d*** with my bi-focals. I can shoot with my old mono-vision glasses and don't get the "halo", but my distance vision is notas good as with my new contacts. Ihave an Extreme RT900 sight with 0.019 pins. Has anyone else experienced this? And are there any suggestions as to solving the "halo" effect?