Perhaps the bi-focal glasses you have do not fit you.
I use progressive's with no issue, when fitted I was asked what I do, vocation, sports etc.
This can have a bearing on where the transition line is on the lens.
Mine are set low, so it does not interfere with a rifle scope or anything else for that matter.
BTW they where $1300 so they should function with out reservation, and do.
Another thing is 'double vision' when looking at the retical. This may be a result of a cataract that is slowly getting worse, happened to me. New lens and everything is back to normal.
