I know centering the sight housing in the peep has gotten a large following over the past few years but I've never agreed with doing that. For one thing, the eye cannot focus on three things at once (peep, sight housing and target) so at least one of those three things is going to be out of focus and fuzzy. IMO, whoever came up with the 'center the housing in the peep' stuff started making sights with round housings and tried to invent some way to sell his sights.

As long as you're looking though the center of the peep, then you shouldn't notice the peepat all. Look through it and center your pin on what you intend to shoot, because the pin is your aiming reference. In fact, you should be focusing on your target and even the pin should be slightly out of focus and fuzzy.

The sight housing is there to protect the pins.Remember when they were called 'pin guards' instead of 'housings?' That's still their only real function. That's the only thingthey're any good for.