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I hear that it is an absolute, blasted in stone, fact that NO ONE can see the front sight and target at the same time.
There is a possibility that this idea could be wrong.
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Let's go back to basic physics. Get out your 35mm camera. Set the aperture to, oh, say f2.0 for purposes of discussion. Place a target 25 yards from the muzzle of your pistol. Take a picture from the shooter's eye view of the front sight, that is, with the camera at the same distance from the front sight as your eye is when shooting. Focus the front sight in sharp. The target will be blurry.
Now, focus on the target. The front sight will be blurry.
This is not an "idea," it's a function of the laws of physics, subspecialty optics.
If you stop the lens down to, oh, say, f22, or better yet, a pinhole in your lens cap, you will find that that at some particular distance to the target, the front sight and the target will be in acceptable focus. That's why bullseye shooters us a a Merit disc on their glasses; it's an adjustable pinhole to effectively get a tiny aperture so as to increase the hyperfocal distance.
Those of us with blended bifocals can amuse ourselves at the range with our aperture sights, peering through the different focal lengths of our glasses to bring the front sight and then the target into focus. Funny thing, you just can't get them both sharp at the same time.
Shoot the center of the blur and you'll get Xs every time.
Regards,
Walt