By popular demand here is a short video I made on Using Zippers One-Handed
I asked my Amputee mate Shane if he had any tips and I think his was a perfect description of how to do it, and how the same logic is useful for a variety of things.
Zippers? Thumb and forefinger grab zip, remaining fingers grip/push down on zipper. Pushing fingers apart pulls zip upward.
I always say you have two hands on each hand…. If that makes sense. Thumb+index finger + middle finger = one hand, little finger + ring finger + thumb = other hand. You need strong fingers.