I was having a conversation with a coworker who is was a Marine Corp sharpshooter. The discussion was about head position and shooting with an astigmatism in an eye. He explain that you may have the shot all lined up and the line to the target may actually be more to the left of the target as seen by the effected eye. This particularly true when tilting the head to one side and sighting over the bands in the gangster slingshot hold. When the eyes are not in the horizontal plane because of the head tilt , the target seen may actually be over to one side in reality. Bottom line. The shot is consistently to say the left. This was my case. I have an astigmatism in my right dominant eye which is closest to the bands when I tilt my head and aim. I found I place the shot to the left of the bulls eye. The solution was to not tilt so much keeping my eyes horizontal and using both to see the target. Has anyone else had experience with this? I know a lot of us aren't spring chickens anymore and are having eye issues.