The eyes are also ballance receptors, for standing shooting a close patch would not help, the big blinder on the rearsight can also have an influence, and impair your ability to control sway. The ideal blinder is a small one just wide enough to block the line of vision to the target but allow you to see either side of it, idealy mounted forward of the eye on glasses frame or hat.
Good Shooting
Robin
Walther KK500 Alutec expert special - Barnard .223 "wilde" in a Walther KK500 Alutec stock, mmm...tasty!! - Keppeler 6 mmBR with Walther grip and wood! I may be a Walther-phile?