Quote:
Even a normal eye cannot focus three points at once.
The front sight should be perfectly focused ! That's why in some of the IPSC matches shooters would wander around mumbling 'front sight ,front sight '
If necessary you can roughly line things up with target focus ,then just before shooting bring your focus back to the front sight !!
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That advice pertains to people who are not trying to shoot with bifocals. The point the original poster was trying to make was that neither lens was good for focusing on the front sight...the close up part of the bifocal has its focal point way too close and the distant focal point of the top lens area kept him from focusing on the front sight. In other words, neither part of the bifocal enables a clear image of the front sight. In my case, I have given up on bifocals for shooting, I just go with a standard pair of shooting glasses and do my best to focus on the front sight...bifocals just make it worse.