I still work the bag both ways. I do notice the difference in how solid or fast punches feel.

From southpaw my punches feel faster, especially the jab.
From orthodox things are stronger. I have a good shovel hook (even if I say so myself) but it doesn't feel so good to the head (possibly with being a girl and most people you end up training with are taller you're throwing at an angel.)

My natural tendancy is to be front footed, I am conscious of that. It's interesting to notice how your boxing style changes when you focus on staying evenly balanced.

It's very interesting for me to consider how much is natural and how much learnt. For about 2 and half years I was taught as a southpaw and I feel more evenly balanced that way, orthodox I have to remind myself to be.

Never considered the role of eyesight.

We did used to perform visual reaction drills.
Person holds the pad, the other hand is used to cue, sometimes in front of you sometimes at your peripheral vision. As you got better the cue would become smaller. Good drill.