Well because the target is closer your eyes are going to need time to adjust. What you should do is slowly move your target back slightly towards the arrows each time you bowl.
Personally I have never used boards or arrows,i'm one of those bowlers who lines themselves up and actually closes their eyes at the release point. I know a few top bowlers do this. If you have done everything correctly then you should not need to focus on one small area so much. Every time I have tried to focus on a particular board/arrow I end up throwing a gutter ball,lol!
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I would have got away with it if it was not for those pesky kids (Behind my lane) and those blasted 10 pins.