my girlfriend has very bad eyesight and complains of not being able to focus the sights well... she loves the 99C because of the ease of operation and her fit.
any suggestions on training and or sight replacement
You could try some night sights. I hear good things about the Trijicons.
Try painting the front white sight dot with cadmium yellow or fluorescent yellow.
I wear no line bifocals and the contrast of color makes for better target acquisition.
$100 Trijicons are great when its dark not so great in broad daylight at the range IMO.
The p99c is a fine compact shooter.